00407708 n68 21 n cabinet installation guide (v200r010_01)

N68-21-N Cabinet Installation Guide

Issue 01

Date 2008-03-20

Part Number 00407708

Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd

Huawei Technologies Co., Ltd. provides customers with comprehensive technical support and service. For anyassistance, please contact our local office or company headquarters.

Huawei Technologies Co., Ltd.Address: Huawei Industrial Base

Bantian, LonggangShenzhen 518129People's Republic of China

Website: http://www.huawei.com

Email: [email protected]

Copyright © Huawei Technologies Co., Ltd. 2008. All rights reserved.No part of this document may be reproduced or transmitted in any form or by any means without prior writtenconsent of Huawei Technologies Co., Ltd. Trademarks and Permissions

and other Huawei trademarks are the property of Huawei Technologies Co., Ltd.All other trademarks and trade names mentioned in this document are the property of their respective holders. NoticeThe information in this document is subject to change without notice. Every effort has been made in thepreparation of this document to ensure accuracy of the contents, but the statements, information, andrecommendations in this document do not constitute a warranty of any kind, express or implied.

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http://www.huawei.com

mailto:[email protected]

Contents

About This Document.....................................................................................................................1

1 Safety Information.....................................................................................................................1-11.1 Safety Precautions...........................................................................................................................................1-11.2 Electricity Safety.............................................................................................................................................1-31.3 Inflammable Environment...............................................................................................................................1-51.4 Battery.............................................................................................................................................................1-51.5 Radiation.........................................................................................................................................................1-71.6 Working at Heights.........................................................................................................................................1-91.7 Mechanical Safety.........................................................................................................................................1-111.8 Others............................................................................................................................................................1-12

2 N68-21-N Cabinet Overview....................................................................................................2-1

3 Preparing for the N68-21-N Cabinet Installation.................................................................3-13.1 Unpacking the RNC........................................................................................................................................3-23.2 Preparing Tools for the N68-21-N Cabinet Installation..................................................................................3-8

4 Installing the N68-21-N Cabinet.............................................................................................4-1

5 Installing the RNC Cabinet on the Concrete Floor (N68-21-N)........................................5-15.1 Materials Required for Installing the N68-21-N Cabinet on the Concrete Floor............................................5-25.2 Positioning the RNC Cabinet on the Concrete Floor (N68-21-N)..................................................................5-25.3 Securing the RNC Cabinet on the Concrete Floor (N68-21-N)......................................................................5-75.4 Combining RNC Cabinets (N68-21-N).........................................................................................................5-13

6 Installing the RNC Cabinet on the ESD Floor (N68-21-N)................................................6-16.1 Materials Required for Installing the N68-21-N Cabinet on the ESD Floor...................................................6-36.2 Introduction to RNC Anti-Seismic Support Assembly...................................................................................6-3

6.2.1 Components of RNC Anti-Seismic Support Assembly.........................................................................6-46.2.2 Fastening Push Buttons on the RNC Anti-Seismic Supports.................................................................6-56.2.3 Cutting RNC Anti-Seismic Supports and Guide Rails...........................................................................6-6

6.3 Positioning the RNC Cabinet on the ESD Floor (N68-21-N).........................................................................6-96.4 Assembling RNC Anti-Seismic Supports.....................................................................................................6-136.5 Installing the Floating Nuts on RNC Anti-Seismic Supports.......................................................................6-186.6 Securing the RNC Anti-Seismic Supports on the Concrete Floor (N68-21-N)............................................6-196.7 Securing the RNC Cabinet on the ESD Floor (N68-21-N)...........................................................................6-22

N68-21-N Cabinet Installation Guide Contents

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6.8 Combining RNC Cabinets (N68-21-N).........................................................................................................6-28

7 Installing Power Cables and PGND Cables of the N68-21-N Cabinet............................7-17.1 RNC Power Cables and PGND Cables to Be Installed...................................................................................7-2

7.1.1 RNC Power Cables.................................................................................................................................7-27.1.2 RNC PGND Cables................................................................................................................................7-5

7.2 Connections of RNC Power Cables and PGND Cables................................................................................7-107.3 Installation Specifications for RNC Power Cables and PGND Cables.........................................................7-117.4 Connecting Power Cables and PGND Cables Between the N68-21-N Cabinet and the PDF......................7-11

7.4.1 Overhead and Underfloor Cabling Modes...........................................................................................7-127.4.2 Installing Power Cables and the PGND Cable Between the N68-21-N Cabinet and the PDF (OverheadCabling).........................................................................................................................................................7-157.4.3 Installing Power Cables and PGND Cables Between the N68-21-N Cabinet and PDF (Underfloor Cabling).......................................................................................................................................................................7-17

7.5 Installing Inter-Cabinet(N68-21-N) PGND Cables.......................................................................................7-207.6 Checking the Power-On Status of the RNC Cabinets...................................................................................7-20

8 Installing Cabinet (N68-21-N) Accessories........................................................................... 8-18.1 Cabinet Accessories to Be Installed (N68-21-N)............................................................................................8-28.2 Installing Side Doors of the N68-21-N Cabinet..............................................................................................8-28.3 Installing Front/Back Doors of the N68-21-N Cabinet...................................................................................8-48.4 Installing PGND Cables to Doors of the Cabinet (N68-21-N).......................................................................8-5

9 Labeling RNC Cabinets............................................................................................................9-1

10 Labeling Power Cables and PGND Cables of the RNC.................................................10-1

11 Appendix..................................................................................................................................11-111.1 Checklist for RNC Cabinet Installation......................................................................................................11-211.2 Exploded View of the N68-21-N Cabinet...................................................................................................11-311.3 Layout of Power Switches on the RNC Cabinet.........................................................................................11-611.4 Connections of Power Cables and PGND Cables in the RNC Cabinet......................................................11-7

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Figures

Figure 1-1 Wearing an ESD wrist strap...............................................................................................................1-5Figure 1-2 Lifting a weight................................................................................................................................1-10Figure 1-3 Slant angle........................................................................................................................................1-11Figure 1-4 One meter higher than the eave........................................................................................................1-11Figure 2-1 Appearance of the N68-21-N cabinet.................................................................................................2-2Figure 3-1 Straightening the tongue.....................................................................................................................3-4Figure 3-2 Removing the cover from the case.....................................................................................................3-5Figure 3-3 Removing the side boards...................................................................................................................3-6Figure 3-4 Unpacking a carton ............................................................................................................................3-7Figure 5-1 Equipment room layout (Unit: mm)...................................................................................................5-3Figure 5-2 Installation holes for one cabinet (unit: mm)......................................................................................5-4Figure 5-3 Installation holes for a row of cabinets (unit: mm).............................................................................5-5Figure 5-4 Installing the expansion bolt assembly...............................................................................................5-7Figure 5-5 Removing metal packing accessories.................................................................................................5-8Figure 5-6 Back view of the subrack....................................................................................................................5-9Figure 5-7 Installing the N68-21-N cabinet on the concrete floor.....................................................................5-11Figure 5-8 Testing the insulation of the RNC cabinet........................................................................................5-12Figure 5-9 Fixing the connecting plates on the top of two adjacent cabinets....................................................5-14Figure 5-10 Installing connecting plates on the lintels of two adjacent cabinets...............................................5-15Figure 6-1 Teeth of the strut rail and the push button..........................................................................................6-5Figure 6-2 Fastening the push button...................................................................................................................6-6Figure 6-3 Guide rail installation for combining an even number of cabinets in a row.......................................6-7Figure 6-4 Guide rail installation for combining an odd number of cabinets in a row........................................6-7Figure 6-5 Guide rail installation for installing a single cabinet..........................................................................6-8Figure 6-6 Equipment room layout (Unit: mm).................................................................................................6-10Figure 6-7 Installation holes for one cabinet (unit: mm)....................................................................................6-11Figure 6-8 Installation holes for a row of cabinets (unit: mm)...........................................................................6-12Figure 6-9 Positions for cutting the ESD floor (unit: mm)................................................................................6-13Figure 6-10 Installing the columns.....................................................................................................................6-14Figure 6-11 Installing column connectors..........................................................................................................6-15Figure 6-12 Installing the guide rails.................................................................................................................6-15Figure 6-13 Installing angle brackets.................................................................................................................6-16Figure 6-14 Assembled support (unit: mm).......................................................................................................6-17

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Figure 6-15 Installing floating nuts (unit: mm)..................................................................................................6-18Figure 6-16 Installing the base...........................................................................................................................6-20Figure 6-17 Installing the expansion bolt assembly...........................................................................................6-21Figure 6-18 Fixing the N800 support.................................................................................................................6-22Figure 6-19 Removing metal packing accessories.............................................................................................6-23Figure 6-20 Back view of the subrack................................................................................................................6-24Figure 6-21 Fixing the cabinet to the support....................................................................................................6-25Figure 6-22 Cabinet fixed to the support............................................................................................................6-27Figure 6-23 Testing the insulation of the RNC cabinet......................................................................................6-28Figure 6-24 Fixing the connecting plates on the top of two adjacent cabinets..................................................6-29Figure 6-25 Installing connecting plates on the lintels of two adjacent cabinets...............................................6-30Figure 7-1 -48 V/RTN internal power cable of the RNC.....................................................................................7-4Figure 7-2 External power cable of the N68E-22 cabinet....................................................................................7-4Figure 7-3 External power cable of the N68-21-N cabinet..................................................................................7-4Figure 7-4 External PGND cable of the N68-21-N cabinet...............................................................................7-10Figure 7-5 External PGND cable of the N68E-22 cabinet.................................................................................7-10Figure 7-6 Internal RNC PGND cable...............................................................................................................7-10Figure 7-7 Cable connections.............................................................................................................................7-10Figure 7-8 Cable holes of the RNC cabinet.......................................................................................................7-13Figure 7-9 Overhead cabling mode....................................................................................................................7-14Figure 7-10 Underfloor cabling mode................................................................................................................7-14Figure 7-11 Install the power cables and the PGND cable between the N68-21-N cabinet and the PDF (overheadcabling)................................................................................................................................................................7-15Figure 7-12 Installing power cables and the PGND cable between the N68-21-N cabinet and PDF (underfloorcabling)................................................................................................................................................................7-18Figure 7-13 Inter-cabinet (68-21-N) PGND cables ...........................................................................................7-20Figure 8-1 Installing side doors of the N68-21-N cabinet....................................................................................8-3Figure 8-2 Installing the front/back doors of the N68-21-N cabinet....................................................................8-4Figure 8-3 Installing PGND cables to the N68-21-N cabinet doors.................................................................... 8-6Figure 9-1 Row labels.......................................................................................................................................... 9-1Figure 9-2 Column labels.....................................................................................................................................9-1Figure 9-3 Position for attaching the product label .............................................................................................9-2Figure 11-1 Exploded view of the N68-21-N cabinet........................................................................................11-4Figure 11-2 Assignment of power switches on the RSR power distribution box..............................................11-6Figure 11-3 Layout of power switches on the RBR power distribution box.....................................................11-7Figure 11-4 Connections of power cables and PGND cables in the N68-21-N cabinet....................................11-8Figure 11-5 Connections of power cables and PGND cables in the N68E-22 cabinet....................................11-10

Figures N68-21-N Cabinet Installation Guide

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Tables

Table 2-1 Engineering specifications for the N68-21-N cabinet..........................................................................2-2Table 3-1 General tools required for the N68-21-N installation..........................................................................3-9Table 5-1 Materials required for installing the N68-21-N cabinet on the concrete floor.....................................5-2Table 6-1 Materials required for installing the N68-21-N cabinet on the ESD floor...........................................6-3Table 6-2 Components of the RNC anti-seismic support assembly ....................................................................6-4Table 7-1 External power cables of the N68-21-N cabinet..................................................................................7-2Table 7-2 External power cables of the N68E-22 cabinet....................................................................................7-3Table 7-3 Internal power cables of the RNC........................................................................................................7-3Table 7-4 PGND cables of the N68-21-N cabinet................................................................................................7-5Table 7-5 PGND cables of the N68E-22 cabinet.................................................................................................7-7Table 8-1 Cabinet accessories to be installed (N68-21-N)...................................................................................8-2Table 11-1 Checked items for RNC cabinet installation....................................................................................11-2Table 11-2 Parts of the N68-21-N cabinet..........................................................................................................11-5Table 11-3 Relation between the switches and subracks....................................................................................11-7Table 11-4 Connections of power cables and PGND cables in the RNC cabinet (N68-21-N)..........................11-8Table 11-5 Connections of power cables and PGND cables in the RNC cabinet (N68E-22)..........................11-10

N68-21-N Cabinet Installation Guide Tables


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About This Document

PurposeThis document describes how to install the N68-21-N cabinet. It covers how to install the cabinet,accessories, external power cables, the PGND cables and how to attach engineering labels tothese cables. This document also provides other references related to the cabinet installation.

Product VersionThe following table lists the product version related to this document.

Product Name Version

RNC V200R010

Intended AudienceThis document is intended for the RNC installers.

Organization

1 Safety Information

2 N68-21-N Cabinet Overview

The N68-21-N cabinet features a modular design. It provides ample space for installing devicessuch as subracks and the power distribution box, so as to facilitate capacity expansion andmaintenance.

3 Preparing for the N68-21-N Cabinet Installation

Before the installation, you need to unpack the N68-21-N cabinet. Ensure that all tools requiredfor installing the N68-21-N cabinet are ready.

4 Installing the N68-21-N Cabinet

The N68-21-N cabinet installation involves installing the cabinet, accessories, external powercables, and PGND cables. In addition, you also need to check the power-on status of the cabinet,attach engineering labels to the cabinet, and attach engineering labels to the external powercables and PGND cables.

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5 Installing the RNC Cabinet on the Concrete Floor (N68-21-N)

This describes how to install the N68-21-N cabinet on the concrete floor.

6 Installing the RNC Cabinet on the ESD Floor (N68-21-N)

This describes how to install the N68-21-N cabinet on the ESD floor.

7 Installing Power Cables and PGND Cables of the N68-21-N Cabinet

This describes how to install the power cables and PGND cables that connect the N68-21-Ncabinet to the power distribution frame (PDF). When the cabinets are combined, you also needto install the PGND cables between the cabinets.

8 Installing Cabinet (N68-21-N) Accessories

This describes how to install the side doors, front doors, back doors of the N68-21-N cabinet,and how to install PGND cables to those doors.

9 Labeling RNC Cabinets

The labels to be attached to the RNC cabinet are the row labels, column labels, and productlabels.

10 Labeling Power Cables and PGND Cables of the RNC

After the power cables and PGND cables of the RNCs are installed, remove the temporary labelsfrom the cables and attach engineering labels to these cables.

11 Appendix

This provides the exploded view of the N68-21-N cabinet and an installation checklist.

Conventions1. Symbol Conventions

The following symbols may be found in this document. They are defined as follows

Symbol Description

DANGERIndicates a hazard with a high level of risk that, if not avoided,will result in death or serious injury.

WARNINGIndicates a hazard with a medium or low level of risk which, ifnot avoided, could result in minor or moderate injury.

CAUTIONIndicates a potentially hazardous situation that, if not avoided,could cause equipment damage, data loss, and performancedegradation, or unexpected results.

TIP Indicates a tip that may help you solve a problem or save yourtime.

NOTE Provides additional information to emphasize or supplementimportant points of the main text.

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2. General Conventions

Convention Description

Times New Roman Normal paragraphs are in Times New Roman.

Boldface Names of files,directories,folders,and users are in boldface. Forexample,log in as user root .

Italic Book titles are in italics.

Courier New Terminal display is in Courier New.

3. Command Conventions


Boldface The keywords of a command line are in boldface.

Italic Command arguments are in italic.

[ ] Items (keywords or arguments) in square brackets [ ] are optional.

{x | y | ...} Alternative items are grouped in braces and separated by verticalbars.One is selected.

[ x | y | ... ] Optional alternative items are grouped in square brackets andseparated by vertical bars.One or none is selected.

{ x | y | ... } * Alternative items are grouped in braces and separated by verticalbars.A minimum of one or a maximum of all can be selected.

[ x | y | ... ] * Alternative items are grouped in braces and separated by verticalbars.A minimum of zero or a maximum of all can be selected.

4. GUI Conventions


Boldface Buttons,menus,parameters,tabs,window,and dialog titles are inboldface. For example,click OK.

> Multi-level menus are in boldface and separated by the ">" signs.For example,choose File > Create > Folder .

5. Keyboard Operation


Key Press the key.For example,press Enter and press Tab.

Key1+Key2 Press the keys concurrently.For example,pressing Ctrl+Alt+Ameans the three keys should be pressed concurrently.

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Key1,Key2 Press the keys in turn.For example,pressing Alt,A means the twokeys should be pressed in turn.

6. Mouse Operation

Action Description

Click Select and release the primary mouse button without moving thepointer.

Double-click Press the primary mouse button twice continuously and quicklywithout moving the pointer.

Drag Press and hold the primary mouse button and move the pointerto a certain position.

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1 Safety Information

1.1 Safety PrecautionsThis section describes certain safety precautions and helps to choose the measurement deviceand testing device. Read and follow these safety precautions before installing, operating, andmaintaining Huawei devices.

Following All Safety Precautions

Before any operation, read the instructions and precautions in this document carefully tominimize the possibility of accidents.

The Danger, Caution, and Note items in the package of documents do not cover all the safetyprecautions that must be followed. They only provide the generic safety precautions foroperations.

Symbols

DANGERThis symbol indicates that casualty or serious accident may occur if you ignore the safetyinstruction.

CAUTIONThis symbol indicates that serious or major injury may occur if you ignore the safety instruction.

NOTE

This symbol indicates that the operation may be easier if you pay attention to the safety instruction.

N68-21-N Cabinet Installation Guide 1 Safety Information


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Complying with the Local Safety Regulations

When operating the device, comply with the local safety regulations. The safety precautionsprovided in the documents are supplementary. You must comply with the local safetyregulations.

General Installation Requirements

The personnel in charge of installation and maintenance must be trained and master the correctoperating methods and safety precautions before beginning work.

The rules for installing and maintaining the device are as follows:

l Only the trained and qualified personnel can install, operate and maintain the device.

l Only the qualified specialists are allowed to remove the safety facilities, and repair thedevice.

l Any replacement of the device or part of the device (including the software) or any changemade to the device must be performed by qualified or authorized personnel of Huawei.

l Any fault or error that might cause safety problems must be reported immediately to thepersonnel in charge.

Grounding Requirements

The following requirements are applicable to the device to be grounded:

l Ground the device before installation and remove the ground cable after uninstallation.

l Do not operate the device in the absence of a ground conductor. Do not damage the groundconductor.

l The unit (or system) must be permanently connected to the protection ground beforeoperation. Check the electrical connection of the device before operation and ensure thatthe device is reliably grounded.

Safety of Personnel

Ensure the following:

l When lightning strikes, do not operate the device and cables.

l When lightning strikes, unplug the AC power connector. Do not use the fixed terminal ortouch the terminal or antenna connector.

NOTE

The previous two requirements are suitable for the wireless fixed terminal.

l To prevent electric shock, do not connect safety extra-low voltage (SELV) circuits totelecommunication network voltage (TNV) circuits.

l To prevent laser radiation from injuring your eyes, never look into the optical fiber outletwith unaided eyes.

l To prevent electric shock and burns, wear the electrostatic discharge (ESD) clothing, glovesand wrist strap, and remove conductors such as jewelry and watch before operation.

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Device Safetyl Before operation, the device must be secured on the floor or other fixed objects, such as

the walls and the mounting racks.l Do not block ventilation openings while the system is running.

l When installing the panel, tighten the screw with the tool.

1.2 Electricity Safety

High Voltage

DANGERl The high voltage power supply provides power for running the system. Direct contact with

the high voltage power supply or contact through damp objects may result in fatal danger.l Non-standard and improper high voltage operations may result in fire and electric shock.

l The personnel who install the AC facility must be qualified to perform operations on highvoltage and AC power supply facilities.

l When installing the AC power supply facility, follow the local safety regulations.

l When operating the AC power supply facility, follow the local safety regulations.

l When operating the high voltage and AC power supply facilities, use the specific toolsinstead of common tools.

l When the operation is performed in a damp environment, ensure that water is kept off thedevice. If the cabinet is damp or wet, shut down the power supply immediately.

ThunderstormThe following requirements are suitable only for the wireless base station or the device with anantenna or GPS antenna.

DANGERIn a thunderstorm, do not perform operations on high voltage and AC power supply facilities oron a steel tower and mast.

High Electrical Leakage

CAUTIONGround the device before powering on the device. Otherwise, the personnel and device are indanger.



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If the "high electrical leakage" flag is stuck to the power terminal of the device, you must groundthe device before powering it on.

Power Cable

CAUTIONDo not install and remove the power cable with a live line. Transient contact between the coreof the power cable and the conductor may generate electric arc or spark, which may cause fireor eye injury.

l Before installing or removing the power cable, turn off the power switch.

l Before connecting the power cable, ensure that the power cable and label comply with therequirements of the actual installation.

Fuse

CAUTIONTo ensure that the system runs safely, when a fuse blows, replace it with a fuse of the same typeand specifications.

Electrostatic Discharge

CAUTIONThe static electricity generated by the human body may damage the electrostatic sensitivecomponents on the circuit board, such as the large-scale integrated circuit (LIC).

In the following situations, the human body generates a static electromagnetic field:

l Movement of body parts

l Clothes friction

l Friction between shoes and the ground

l Holding plastic in hand

The static electromagnetic field will remain within the human body for a long time.

Before contacting the device, plug boards, circuit boards, and application specific integratedcircuits (ASICs), wear a grounded ESD wrist strap. It can prevent the sensitive components frombeing damaged by the static electricity in the human body. If neither the ESD wrist strap nor anappropriate PGND point is provided, wear the ESD gloves.

Figure 1-1shows how to wear an ESD wrist strap.



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Figure 1-1 Wearing an ESD wrist strap

1.3 Inflammable Environment

DANGERDo not place the device in the environment that has inflammable and explosive air or fog. Donot perform any operation in this environment.

Any operation of the electrical device in the inflammable environment causes danger.

1.4 Battery

Storage Battery

DANGERBefore handling the storage battery, read the safety precautions for the handling and connectionof the storage battery.

Incorrect operation of storage batteries may cause danger. During operation, ensure thefollowing:

l Prevent any short-circuit.

l Prevent the electrolyte from overflowing and leakage.

Electrolyte overflow may damage the device. It will corrode the metal parts and the circuitboards, and ultimately damage the device and cause short-circuit of the circuit boards.



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General Operations

Before installing and maintaining the storage battery, ensure the following:

l Use special insulation tools.

l Use eye protection devices and operate with care.

l Wear rubber gloves and an apron in case of an electrolyte overflow.

l Always keep the battery upright when moving. Do not place the battery upside down or tiltit.

Short-Circuit

DANGERShort-circuit of the battery may cause injury. Although the voltage of a battery is low, hightransient current generated by short-circuit will release a surge of power.

Keep metal objects away from the battery to prevent short circuit. If they have to be used,disconnect the battery in use before performing any other operation.

Harmful Gas

CAUTIONl Do not use unsealed lead-acid storage batteries, because the gas emitted from it may result

in fire or device corrosion.

l Lay the storage battery horizontally and fix it properly.

The lead-acid storage battery in use will emit flammable gas. Therefore, store it in a place withgood ventilation and take precautions against fire.

High Temperature

CAUTIONHigh temperature may result in distortion, damage, and electrolyte overflow of the battery.

When the temperature of the battery exceeds 60oC, check whether there is acid overflow. If acidoverflow occurs, handle the acid immediately.



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Acid

CAUTIONIf the acid overflows, it should be absorbed and neutralized immediately.

When handling a leaky battery, protect against the possible damage caused by the acid. Use thefollowing materials to absorb and neutralize acid spills:

l Sodium bicarbonate (baking soda): NaHCO3

l Sodium carbonate (soda): Na2CO3

Antacids must be used according to the instructions provided by the battery manufacturer.

Lithium Battery

CAUTIONThere is danger of explosion if the battery is incorrectly replaced.

l Replace the lithium battery with the same or equivalent type recommended by themanufacturer.

l Dispose of the used battery according to the instructions provided by the manufacturer.

l Do not dispose of the lithium battery in fire.

1.5 Radiation

Electromagnetic Field Exposure

CAUTIONHigh power radio-frequency signals are harmful to human body.

Before installing or maintaining an antenna on a steel tower or mast with a large number oftransmitter antennas, the operator should coordinate with all parties to ensure that the transmitterantennas are shut down.

The base transceiver station (BTS) has RF radiation (radiation hazard). Suggestions for theinstallation and operation of BTSs are given in the following section. Operators are also requiredto comply with the related local regulations on erecting BTSs.

l The antenna should be located in an area that is inaccessible to the public where the RFradiation exceeds the stipulated value.



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l If the areas where RF radiation exceeds the stipulated value are accessible to workers,ensure that workers know where these areas are. They can shut down the transmitters beforeentering these areas. Such areas may not exist; but if they exist, the areas must be within arange of less than 10 m around the antennas.

l Each forbidden zone should be indicated by a physical barrier and striking sign to warn thepublic or workers.

Laser

CAUTIONWhen handling optical fibers, do not stand close to, or look into the optical fiber outlet withunaided eyes.

Laser transceivers or transmitters are used in the optical transmission system and associated testtools. Because the laser that is transmitted through the optical fiber produces a small beam oflight, it has a very high power density and is invisible to human eyes. If a beam of light entersthe eye, the retina may be damaged.

Normally, staring into the end of an unterminated optical fiber or broken optical fiber with theunaided eyes from a distance of more than 150 mm [5.91 in.] will not cause eye injury. Eyesmay, however, be damaged if an optical tool such as a microscope, magnifying glass or eyeloupe is used to stare into the bare optical fiber end.

Read the following guidelines to prevent laser radiation:

l Only the trained and authorized personnel can perform the operation.

l Wear a pair of eye-protective glasses when you are handling lasers or optical fibers.

l Ensure that the optical source is switched off before disconnecting optical fiber connectors.

l Never look into the end of an exposed optical fiber or an open connector if you cannotensure that the optical source is switched off.

l To ensure that the optical source is switched off, use an optical power meter.

l Before opening the front door of an optical transmission system, ensure that you are notexposed to laser radiation.

l Never use an optical tool such as a microscope, a magnifying glass, or an eye loupe to lookinto the optical fiber connector or end.

Read the following instructions before handling optical fibers:

l Only the trained personnel can cut and splice optical fibers.

l Before cutting or splicing an optical fiber, ensure that the optical fiber is disconnected fromthe optical source. After disconnecting the optical fiber, use protecting caps to protect allthe optical connectors.



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1.6 Working at Heights

CAUTIONWhen working at heights, ensure that the objects do not fall.

When working at heights, ensure that the following requirements must be met:

l The personnel who work at heights must be trained.

l The operating machines and tools should be carried and handled safely to prevent themfrom falling.

l Safety measures, such as wearing a helmet and a safety belt, should be taken.

l In cold regions, warm clothes should be worn before working at heights.

l Ensure that the lifting appliances are well prepared for working at heights.

Lifting Weights

CAUTIONDo not access the areas under the arm of the crane and the goods in suspension when liftingweights.

l Ensure that the operators have been trained and qualified.

l Check the weight lifting tools and ensure that they are intact.

l Lift the weight only when the weight lifting tools are firmly mounted onto the weight-bearing object or the wall.

l Use a concise instruction to prevent incorrect operation.

l The angle between the two cables should be less than or equal to 90o in the lifting of weights(See Figure 1-2).



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Figure 1-2 Lifting a weight

Safety Guide on Ladder UseChecking the Ladder

l Check the ladder before using it. Check the maximum weight that the ladder can support.

l Never overload the ladder.

Placing the Ladder

l The slant angle is preferred to be 75o. The slant can be measured with the angle square orwith arms, as shown in Figure 1-3. When using a ladder, place the wider end of the ladderon the ground and take protective measures on the base of the ladder against slippage. Placethe ladder on a stable ground.

When climbing the ladder, ensure the following:

l The gravity of the body does not shift from the edge of the ladder.

l Keep balance on the ladder before performing any operation.

l Do not climb higher than the fourth highest step of the ladder.

If you tend to climb to the roof, the length of the ladder should be at least one meter higher thanthe eave, as shown in Figure 1-4.



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Figure 1-3 Slant angle

Figure 1-4 One meter higher than the eave

1.7 Mechanical Safety

Drilling

CAUTIONDo not drill on the cabinet without permission. Inappropriate drilling on the cabinet may damagethe electromagnetic shielding and internal cables. Metal shavings from the drilling may resultin a short-circuit of the circuit board if they get into the cabinet.

l Before drilling a hole on the cabinet, remove the cables from the cabinet.



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l During the drilling, wear blinkers to protect your eyes.

l During the drilling, wear the protective gloves.

l Prevent the metal shavings from getting into the cabinet. After drilling, clean the metalshavings in time.

Handling Sharp Objects

CAUTIONWhen carrying the device by hand, wear the protective gloves to prevent injury by sharp objects.

Handling Fansl When replacing a component, place the component, screw, and tool at a safe place to prevent

them from falling into the running fan.l When replacing the ambient equipment around the fan, do not place the finger or board

into the running fan until the fan is switched off and stops running.

Moving Heavy ObjectsWear the protective gloves when moving heavy objects.

CAUTIONl Be careful when moving heavy objects.

l When moving the chassis outwards, be aware about the unfixed or heavy objects on thechassis to prevent injury.

l Two persons should be available to move a chassis; one person must not move a heavychassis. When moving a chassis, keep your back straight and move stably to prevent asprain.

l When moving or lifting a chassis, hold the handle or bottom of the chassis. Do not hold thehandle of the installed modules in the chassis, such as the power module, fan module, orboard.

1.8 Others

Inserting and Removing a Board

CAUTIONWhen inserting a board, wear the ESD wrist strap or gloves. Insert the board gently to preventany bent pins on the backplane.



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l Insert the board along the guide rail.

l Avoid contact of one board with another to prevent short-circuit or damage.

l Do not remove the active board before powering off.

l When holding a board in hand, do not touch the board circuit, components, connectors, orconnection slots.

Bundling Signal Cables

CAUTIONBundle the signal cables separately from the strong current cables or high voltage cables.

Cabling RequirementsAt a very low temperature, movement of the cable may damage the plastic skin of the cable. Toensure the construction safety, comply with the following requirements:

l When installing cables, ensure that the environment temperature is above 0oC.

l If cables are stored in the place below 0oC, move the cables into a place at a roomtemperature and store the cables for more than 24 hours before installation.

l Move the cables with care, especially at a low temperature. Do not drop the cables directlyfrom the vehicle.



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2 N68-21-N Cabinet Overview

The N68-21-N cabinet features a modular design. It provides ample space for installing devicessuch as subracks and the power distribution box, so as to facilitate capacity expansion andmaintenance.

Appearance of the N68-21-N CabinetThe color of the N68-21-N cabinet surface is purple gray and silver gray. Figure 2-1 shows theappearance of the N68-21-N cabinet.

N68-21-N Cabinet Installation Guide 2 N68-21-N Cabinet Overview


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Figure 2-1 Appearance of the N68-21-N cabinet

Engineering Specifications for the N68-21-N CabinetTable 2-1 describes the engineering specifications for the N68-21-N cabinet.

Table 2-1 Engineering specifications for the N68-21-N cabinet

Item Specification

Dimension (H x W x D) 2,130 mm (H) x 600 mm (W) x 800 mm (D)

Available space height 44 U

Weight Rack: ≤ 105 kg; Empty cabinet: ≤ 155 kg;Cabinet in full configuration: ≤ 410 kg

Power supply Four -48 V DC inputs

2 N68-21-N Cabinet Overview N68-21-N Cabinet Installation Guide


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Item Specification

EMC l GR 1089

l ETSI EN300 386

l Council directive 89/336/EEC

N68-21-N Cabinet Installation Guide 2 N68-21-N Cabinet Overview


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3 Preparing for the N68-21-N CabinetInstallation

About This Chapter

Before the installation, you need to unpack the N68-21-N cabinet. Ensure that all tools requiredfor installing the N68-21-N cabinet are ready.

3.1 Unpacking the RNCWhen the packing cases that contain the RNC cabinets and components are delivered to the site,unpack the cases and check the equipment quality so as to facilitate the smooth installation.

3.2 Preparing Tools for the N68-21-N Cabinet InstallationThe tools required involve measuring tools, marking tools, drilling tools, fastening tools, pliers,auxiliary tools, meters, and some special tools.

N68-21-N Cabinet Installation Guide 3 Preparing for the N68-21-N Cabinet Installation


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3.1 Unpacking the RNCWhen the packing cases that contain the RNC cabinets and components are delivered to the site,unpack the cases and check the equipment quality so as to facilitate the smooth installation.

Prerequisitel Site preparation for the RNC installation is complete.

l The packing cases that contain the cabinets and components are ready on site.

Context

CAUTIONElectronic devices such as boards and Application Specific Integrated Circuit (ASIC) are ESD-prone. When operate with these devices, correctly put on an ESD wrist strap. Ensure that theESD wrist strap is properly connected to the ESD connector on the cabinet. If neither the ESDwrist strap nor an appropriate PGND point is provided, wear the ESD gloves.

l When moving the equipment, prevent the equipment from colliding with objects such asdoors, walls, or shelves.

l Do not touch the unpainted metal surface of the equipment or its components with sweat-soaked or dirty gloves.

Procedure

Step 1 Unload the packing cases.

CAUTIONArrange the packing cases in sequence and the labels in the same direction to facilitate the check.

Step 2 When unloading the equipment, check whether the quantity of the packing cases on the sitematches with the Packing List. Ensure that the place of delivery is the correct installation place.

If... Then...

The quantity of the packing cases on site matches with the Packing List. Go to Step 4.

The quantity of the packing cases on site does not match with the PackingList.

Go to Step 3.

3 Preparing for the N68-21-N Cabinet Installation N68-21-N Cabinet Installation Guide


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Step 3 In case of any error, the installation supervisor must stop the unpacking immediately and sendthe Article Problem Feedback Form to the order management engineer in the local Huawei officewithin three days. Note that this form must be signed by the customer.

Step 4 Check whether the packing cases are intact and the equipment is placed upright in transit.

If... Then...

Any packing case is damaged or soaked. Go to Step 5.

The packing cases are intact. Go to Step 6.

Step 5 Stop the unpacking immediately, make investigations to find the cause, and contact the ordermanagement engineer in the local Huawei office for further treatment.

CAUTIONTo protect the equipment and find out the causes, perform the following steps: Move theunpacked equipment indoor for proper storage, take photos of the storage environment and ofthe rusted or corroded equipment, packing cases, and packing materials. Keep these photos forlater verification. Store the packing cases and materials in a proper place.

Step 6 Unpack the wooden cases.

CAUTIONl Before the unpacking, move the wooden cases into or close to the equipment room if there

is enough space. This prevents damage to the cabinets in transit.l You can find articles rapidly according to the names, codes, locations, and quantities of the

articles on the Packing List.l Here shows an example of a wooden case that contains the cabinet. The methods for

unpacking other types of wooden cases are similar.

1. Place the wooden case on the ground. Ensure that the side with the wooden frame faces thebottom.

2. Use a wrench, a straight screwdriver, or a claw hammer to straighten the tongue.Refer to Figure 3-1.



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Figure 3-1 Straightening the tongue

3. Remove the cover. If the wooden case contains a carton, take out the carton and then openit according to Step 7. If the wooden case contains a cabinet, go to the next step. Refer toFigure 3-2.



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Figure 3-2 Removing the cover from the case

4. Remove the side boards of the wooden case in the same way as described previously. Referto Figure 3-3.



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Figure 3-3 Removing the side boards

5. Erect the cabinet with the BOTTOM side down.

CAUTIONIf the cabinet falls during the erection, it may cause personnel injury. Therefore, thisoperation requires three to five installers to work together.

6. Remove the base of the case, that is, the side with the wooden frame.7. Remove the foamed wrap angles.8. Remove the vacuum plastic bag.

Step 7 Unpack the carton, as shown in Figure 3-4.



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Figure 3-4 Unpacking a carton

(1) Carton label (2) Strap (3) Pressure-sensitive adhesive tape(4) Foam block (5) Board label (6) Board

1. Check the types and quantities of the articles in the carton according to the label on thecarton.

2. Cut the straps using the diagonal pliers.3. Rip the adhesive tape along the joint seams using the paper knife. Do not insert the knife

too deep, otherwise the articles may be damaged.4. Unpack the carton and take out the articles.

Step 8 Unpack boards.

CAUTIONl Electronic components are extremely sensitive to static electricity. Therefore, properly wear

an ESD wrist strap or glove when unpacking the boards.l The ESD bag contains the desiccant to keep the bag dry. When taking the board from a cold

dry place to a hot damp place, wait at least 30 minutes before unpacking the board. Otherwise,moisture condensed on the board surface may damage the board.

1. Check that there is no evident damage on the board packages.2. Open the packages and check that the boards are in good condition. For any problem,

contact the order management engineer at the local Huawei office.

Step 9 Check whether the unpacked boards need to be installed immediately, and proceed accordingly.

If... Then...

The board needs to be installedimmediately.

Place the board on an ESD surface anddischarge the static electricity.

The board does not need to be installedimmediately.

Pack the board with the original materials andplace them at a cool dry place away from directsunlight or strong electromagnetic radiation.

Step 10 Check the articles one by one according to the name, type, and quantity of each article stated onthe Packing List.



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The checking of the articles covers the following aspects:l Appearance: Check that there are no defects on the appearance of the cabinet; there is no

looseness, distortion, or damage; the identification is legible; all nameplates and decoratingplates are available and meet the requirements.

l Integrity: Check that all the parts and accessories required for the installation of cabinets areavailable.

l Computer terminal: Check that the monitor, keyboard, and mouse are all available and ingood condition.

l Boards: Check that the type and quantity of the boards are consistent with the Packing List;no printed circuit board is broken; no component is detached from the board.

NOTE

The installation supervisor should be responsible for the inspection of the electrically sensitive equipmentand components.

If... Then...

The item saying "Outstanding articles" isstated on the Packing List.

The installation supervisor informs the ordermanagement engineer at the local Huaweioffice for further treatment. At the same time,both parties sign the Packing List.

There is any absent, wrong, or extrashipment, or any damaged articles.

Note the following points: Representatives ofHuawei and the customer both sign theUnpacking Inspection Memo and PackingList. The installation supervisor must fill in theArticle Problem Feedback Form and sends itback to the order management engineer at thelocal office within three days. The installationsupervisor must keep the problematic articlestogether with the inner and outer packing intactfor future investigation and verification.

All the products are intact. Place the inspected articles by the type. Then,both parties sign the Packing List.

----End

3.2 Preparing Tools for the N68-21-N Cabinet InstallationThe tools required involve measuring tools, marking tools, drilling tools, fastening tools, pliers,auxiliary tools, meters, and some special tools.

General ToolsThe general tools required for the N68-21-N installation are listed in Table 3-1.



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Table 3-1 General tools required for the N68-21-N installation

Types Tools

Measuring tools Long tape, 50 m ribbon tape, 5 m measuring tape, 400 mm level bar, andlevel instrument

Marking tools Marking pen, pencil

Drilling tools Percussion drill with matching bits of Ф6, Ф8, Ф10, Ф12, Ф14, and Ф16,and vacuum cleaner

Fastening tools Straight screwdrivers (M3 to M6)Cross screwdrivers (M3 to M6)Adjustable wrenchSocket wrenches (M6, M8, M10, M12, M14, M17, M19)Double ring wrenches (M6, M8, M10, M12, M14, M17, M19)Combination wrenches (M17 and M19)Long-arm wrench

Pliers Sharp-nose pliers, diagonal pliers, pincer pliers, electric hand drill, file,hacksaw, crowbar, rubber hammer, and nail hammer

Auxiliary tools Paper knife, bellows, plumb, fork, ladder, heat blower, and insulating tape

Special ToolsSpecial tools required for the N68-21-N installation: earth resistance meter, ESD wrist strap,ESD glove, cable peeler, clamping pliers, safety knife, and multi-purpose crimping pliers.

MetersMeters required for the N68-21-N installation: multimeter, 500 V megohm meter (for testinginsulation resistance).

NOTE

The meters must be checked and certified.



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4 Installing the N68-21-N Cabinet

The N68-21-N cabinet installation involves installing the cabinet, accessories, external powercables, and PGND cables. In addition, you also need to check the power-on status of the cabinet,attach engineering labels to the cabinet, and attach engineering labels to the external powercables and PGND cables.

Prerequisitel The RNC equipment is unpacked and accepted.

l The tools required for the installation are all ready.

Procedure

Step 1 Install the N68-21-N cabinet.

If... Then...

Installing the N68-21-N cabinet on the ESDfloor,

Refer to 6 Installing the RNC Cabinet on theESD Floor (N68-21-N).

Installing the N68-21-N cabinet on theconcrete floor,

Refer to 5 Installing the RNC Cabinet on theConcrete Floor (N68-21-N).

Installing the N68-21-N cabinet on othertypes of floor,

Contact Huawei engineers for technicalsupport.

Step 2 Install power cables and PGND cables for the N68-21-N cabinet. Refer to 7 Installing PowerCables and PGND Cables of the N68-21-N Cabinet.

Step 3 Install accessories for the N68-21-N cabinet. Refer to 8 Installing Cabinet (N68-21-N)Accessories.

Step 4 Attach engineering labels to the RNC cabinet. Refer to 9 Labeling RNC Cabinets.

Step 5 Attach engineering labels to external power cables and PGND cables. Refer to 10 LabelingPower Cables and PGND Cables of the RNC.

----End

N68-21-N Cabinet Installation Guide 4 Installing the N68-21-N Cabinet


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5 Installing the RNC Cabinet on the ConcreteFloor (N68-21-N)

About This Chapter

This describes how to install the N68-21-N cabinet on the concrete floor.

Prerequisitel The cabinet to be installed is delivered to the site, unpacked, and accepted.

l The cabinet components to be installed are all ready.

1. 5.2 Positioning the RNC Cabinet on the Concrete Floor (N68-21-N)The positioning of the N68-21-N cabinet on the concrete floor includes the following steps:determining cabinet positions, marking the positions, drilling holes, and installingexpansion bolt assemblies.

2. 5.3 Securing the RNC Cabinet on the Concrete Floor (N68-21-N)This describes how to secure the N68-21-N cabinet on the concrete floor.

3. 5.4 Combining RNC Cabinets (N68-21-N)This describes how to combine multiple N68-21-N cabinets.

N68-21-N Cabinet Installation Guide5 Installing the RNC Cabinet on the Concrete Floor (N68-21-

N)


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5.1 Materials Required for Installing the N68-21-N Cabineton the Concrete Floor

This installation requires only the N68-21-N cabinets which serve as the RSR cabinet and theRBR cabinet.

Table 5-1 lists the materials.

Table 5-1 Materials required for installing the N68-21-N cabinet on the concrete floor

Type Quantity

RSR cabinet 1

RBR cabinet 0-1, depends on the site requirements

5.2 Positioning the RNC Cabinet on the Concrete Floor(N68-21-N)

The positioning of the N68-21-N cabinet on the concrete floor includes the following steps:determining cabinet positions, marking the positions, drilling holes, and installing expansionbolt assemblies.

Prerequisitel The parts required for the installation are all ready. The parts refer to the expansion bolt

assemblies M12 x 102.l The materials required for the installation are all ready. The material refers to the equipment

room layout.l The tools required for the installation are all ready. The tools refer to the tape measure, ink

fountain, marking pen, percussion drill with the Ф16 and Ф18 bits, vacuum cleaner,protective glasses, dustproof cover for electronic equipment, socket wrench, and rubberhammer.

Procedure

Step 1 Use a tape measure to determine the position for installing the cabinet according to sitemeasurement or dimensions provided by the equipment room layout, as shown in Figure 5-1.

5 Installing the RNC Cabinet on the Concrete Floor (N68-21-N) N68-21-N Cabinet Installation Guide


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Figure 5-1 Equipment room layout (Unit: mm)

CAUTIONIf the installation positions have to be changed, it is recommended that the new positions fulfillthe following requirements:

l The distance between two rows of combined cabinets is at least 1000 mm.

l The distance between a wall and its closest cabinet is at least 800 mm.

l The distance between a wall and its closest row of cabinets is at least 800 mm.

l The aisle for the equipment room should be at least 1000 mm in width.


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Step 2 Draw lines.1. Determine the position of the datum line which is parallel to the front of the cabinets

according to the dimensions specified in the Equipment Room Layout.2. According to Figure 5-2 or Figure 5-3, use a tape measure to determine several marking

points. Use an ink fountain or a marking pen to draw two straight lines parallel to the datumline. The spacing between the two straight lines is 408 mm.

Figure 5-2 Installation holes for one cabinet (unit: mm)



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Figure 5-3 Installation holes for a row of cabinets (unit: mm)

CAUTIONLine drawing is one of the primary jobs of installation. The imprecise drawing will causegreat inconvenience to the later work. Therefore, to guarantee the preciseness of the linedrawing is to guarantee the quality of the whole project.

3. Determine the position of the installation hole of the first expansion blot assembly. Withthis position as reference, mark the installation holes of the other expansion blot assemblies.

4. Implement another measurement after all the drilling positions are marked to ensure thatthe dimensions of the holes are correct.

Step 3 Drill holes.


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NOTE

Hole drilling is one of the primary jobs of installation. The imprecise drilling will cause great inconvenienceto the later work. Therefore, to guarantee the quality of the hole drilling is to guarantee the quality of thewhole project.

l Before drilling holes, ensure that the positions of the holes are correct based on Figure 5-2 or Figure5-3.

l For some types of concrete floors, for example, the post-tension slabs with tension steel cables, consultthe architectural engineers and get their permission before drilling the holes.

l Check the thickness of the concrete floor before the drilling and note that penetrating the concrete flooris forbidden. If the concrete floor is not thick enough to hold the expansion bolt assemblies, change forother proper expansion bolt assemblies.

l Take dustproof measures on the electronic equipment before the drilling, for example, cover theelectronic equipment with dustproof cover.

l Clean the dust with a vacuum cleaner while drilling holes. Before removing the dustproof cover fromthe electronic equipment, clean the pieces of concrete which accumulate during the drilling.

l Wear safety goggles during the drilling to protect your eyes from the harm of dust.

1. Install the Ф16 bit on the percussion drill and fix the scaleplate on the percussion drill toensure that the drilling depth is from 85 mm to 90 mm.

NOTE

The drilling depth must not be smaller than 85 mm or greater than 90 mm. Otherwise, the expansionbolt assembly cannot be properly installed and fastened.

2. Align the drilling bit upright to the drilling position. Hold the drill stock tightly, and drilla hole. Use a vacuum cleaner to clean the dust while drilling the hole.

NOTE

If the ground is too hard and slippery to settle the drill bit, dig a pit using a chisel before the drilling.If a reinforcing steel bar is found where the hole is drilled, give up the hole and drill another hole alittle inward along the diagonal.

3. Clean the dust in the hole. Check that the hole is deep enough. Otherwise, drill deeper.Check that the hole is straight. Otherwise, try to correct it. If you cannot correct the slant,do not use the hole.

4. Replace the Φ16 bit with the Φ18 bit, and drill the holes until their diameter meets therequirement.

NOTE

If the hole is not straight and you cannot correct it, give it up and drill another hole.

Step 4 Install expansion bolt assemblies. Figure 5-4 shows how to assemble the expansion boltassembly.



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Figure 5-4 Installing the expansion bolt assembly

(1) Expansion bolt (2) Flat washer (3) Steel tube

(4) Plastic tube (5) Expansion tube (6) Conical nut

1. Clean all dust inside and outside the holes by using the vacuum cleaner.

2. Measure the distance between the holes. If the position of a hole is not correct, re-positionand drill a new hole.

3. Insert the expansion bolt assembly vertically into the installation hole on the ground.

4. Hammer the expansion bolt assembly by using a rubber hammer until the expansion boltassembly reaches the bottom of the installation hole, as shown in Figure 5-4.

5. Use the socket wrench to loosen the bolt, and then remove the bolt, the flat washer, and thesteel tube. Properly store the bolt, the flat washer, and the steel tube for later installation.

----End

PostrequisiteRecord the results of positioning the N68-21-N cabinet in the table, as shown in Data Sheets ofRNC Hardware Installation.

5.3 Securing the RNC Cabinet on the Concrete Floor(N68-21-N)

This describes how to secure the N68-21-N cabinet on the concrete floor.

Prerequisitel The equipment required for the securing is ready. The equipment refers to the N68-21-N

cabinet.

l The materials required for the installation are all ready. The materials refer to the insulatingpads, flat washers 12, spring washers 12, adjusting pads (optional), and expansion boltassemblies.


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l The tools required for the installation are all ready. The tools refer to the horizontal ruler,torque wrench, and multimeter.

Context

CAUTIONThe gravity center of the N68-21-N cabinet lies in the upper part. Therefore, do not lift or pushthe cabinet alone. To ensure personnel safety and equipment safety, the displacement of a cabinetrequires at least two persons and that you use appropriate tools.

Procedure

Step 1 Remove the protection boards from the front and the back of the cabinet.

Step 2 Remove the metal packing accessories from the cabinet columns, as shown in Figure 5-5.

Figure 5-5 Removing metal packing accessories

Step 3 Remove the lowest subrack and store it properly for future use.



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NOTEThe components installed in the lower part (5U high) of the cabinet will interfere with the cabinetinstallation (1 U = 44.45 mm). Therefore, you must remove the components before the cabinet installationand reinstall them after the cabinet installation.

1. On the back of the subrack, remove the bolt M3 on the right of the plastic cover of thepower cable terminal, and loosen the bolt M3 on the left until the plastic cover is movable.Do not remove the bolt M3 on the left. Refer to Figure 5-6.

Figure 5-6 Back view of the subrack

(1) Monitoring cable of the power distribution box (2) Power cable (3) PGND cable

(4) Plastic cover (5) Bolt M3 (6) Board frame

2. Remove the power cables. Figure 5-6 shows the positions of the power cables.

CAUTIONRemember the installation positions of the power cables when removing the cables becauseyou need to install the power cables back later.

3. From the back of the subrack, remove the PGND cables and the monitoring cable of thepower distribution box. Figure 5-6 shows the positions of the cables.

4. Use the cable ties to bind these cables to the mounting bars, and properly store the boltsand nuts for future use.

5. In the front of the cabinet, use the cross screwdriver to remove all the eight bolts M6 x 12that fix the subrack to the cabinet, and store the bolts for future use.


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CAUTIONThree persons are required to remove the subrack. Ensure personnel safety.

6. One person pushes the subrack out along the guide rail from the back of the cabinet. Theother two persons hold the mounting ears and the bottom of the subrack to pull the subrackout of the cabinet from the front of the cabinet.

7. Keep the subrack properly for later installation.

Step 4 Lay insulating pads on the floor, as shown in Figure 5-7. Each cabinet uses two insulating pads.



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Figure 5-7 Installing the N68-21-N cabinet on the concrete floor

(1) Expansion bolt (2) Spring washer 12 (3) Flat washer

(4) Large flat washer (5) Insulating washer (6) Steel tube

(7) Installation hole (8) Insulating pad (9) Adjusting pad (optional)


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Step 5 Put the cabinet in the planned position. Align the installation holes on the cabinet with the holesfor the expansion bolt assemblies.

Step 6 Use the horizontal ruler to check the levelness of the cabinet. If the cabinet is not at one level,adjust it by inserting adjusting pads between the insulating pads and the floor. Refer to Figure5-7.

CAUTIONEnsure that the adjusting pads are inserted between the insulating pads and the floor. If theadjusting pads are inserted between the insulating pads and the cabinet, the insulating pads cannotperform the insulation.

Step 7 As shown in Figure 5-7, put the steel tube, insulating tube, and large flat washer on theinstallation hole. Ensure that the convex of the insulating tube faces downwards.

Step 8 Fit the spring washer 12 and flat washer on the bolt, and vertically insert the bolt into the steeltube, as shown in Figure 5-7.

Step 9 Diagonally fasten the four expansion bolt assemblies to 80 N.m.

Step 10 Measure the resistance between the fixing bolt and the grounding bolt at the bottom of thecabinet.

1. Set the multimeter to the megohm range.

2. Measure the resistance between the fixing bolt and the grounding bolt, as shown in Figure5-8.

Figure 5-8 Testing the insulation of the RNC cabinet

1 Resistance tester of the multimeter 2 Fixing bolt 3 Grounding bolt



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If Then,

The resistance ≥ 5 megohm, The cabinet is insulated from the support. End this test.

The resistance < 5 megohm, The cabinet is not insulated from the support. Go to Step 11.

Step 11 Uninstall the cabinet.

Step 12 Check that all insulating parts are installed and in good condition.The insulating parts refer to the insulating pads and insulating tubes used during the cabinetinstallation.

Step 13 Reinstall the cabinet.

Step 14 Go to Step 10, and then perform the insulating test again until the resistance is at least 5 megohm.

Step 15 Reinstall the subrack that has been removed in the cabinet.

1. Two persons hold the mounting ears and the bottom of the subrack and push the subrackinto the cabinet along the guide rail. Use the eight bolts M6 x 12 to fix the subrack to thecabinet.

2. On the back of the cabinet, connect the PGND cables, power cables, and the monitoringcable of the power distribution box. Reinstall the two plastic covers, as shown in Figure5-6.

----End

PostrequisiteRecord the installation results in the checklist, as shown in Data Sheets of RNC HardwareInstallation.

5.4 Combining RNC Cabinets (N68-21-N)This describes how to combine multiple N68-21-N cabinets.

PrerequisiteThe tools required for the installation are all ready. The tools refer to the wrench and the climbingladder.

ContextWhen the cabinet installation is complete, use the connecting plates to connect the adjacentcabinets. This ensures that all the cabinets are upright. The connecting plates are already installedon the top of the cabinets before delivery.

NOTE

The cabinets cannot be installed back to back. When multiple cabinets are installed, they can only beinstalled side by side.

Figure 5-9 and Figure 5-10 show how to fix the connecting plates to combine cabinets.


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Figure 5-9 Fixing the connecting plates on the top of two adjacent cabinets



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Figure 5-10 Installing connecting plates on the lintels of two adjacent cabinets

Procedure

Step 1 Reach the top of the cabinet by the aid of a climbing ladder.

Step 2 Remove the connecting plates from the top of the two adjacent cabinets, as shown in part ② ofFigure 5-9.

Step 3 Reinstall the connecting plates and connect them, as shown in parts ③ to ⑦ of Figure 5-9.

Step 4 Remove the connecting plates from the lintels of the two adjacent cabinets, as shown in part② of Figure 5-10.

Step 5 Reinstall the connecting plates and connect them, as shown in parts ③ to ⑤ of Figure 5-10.

Step 6 Check that the horizontal and vertical errors of the cabinets meet the requirements.

Step 7 Check that all of the cabinets are at the same level and stand side by side closely.

----End


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PostrequisiteRecord the operation results in the checklist, as shown in Data Sheets of RNC HardwareInstallation.



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6 Installing the RNC Cabinet on the ESD Floor(N68-21-N)

About This Chapter

This describes how to install the N68-21-N cabinet on the ESD floor.

Prerequisitel The cabinet to be installed is delivered to the site, unpacked, and accepted.

l The cabinet components to be installed are all ready.

Context

CAUTIONIn the cabinet installation, you may need to cut the ESD floor or some components of the support.When doing the cutting, wear gloves to avoid any injury.

1. 6.3 Positioning the RNC Cabinet on the ESD Floor (N68-21-N)This describes how to position the N68-21-N cabinet on the ESD floor. The main steps aredetermining the installation position of the cabinet, drawing lines, and drilling holes.

2. 6.4 Assembling RNC Anti-Seismic SupportsThis describes how to assemble the anti-seismic support using the components. Themethods of assembling the RNC anti-seismic supports are similar to those of combiningan even number of cabinets in a row, of combining an odd number of cabinets in a row,and of installing a single cabinet. Here shows an example of installing a single cabinet.

3. 6.5 Installing the Floating Nuts on RNC Anti-Seismic SupportsAfter the anti-seismic support is assembled, the floating nuts must be installed to fix theN68-21-N cabinet on the anti-seismic support.

4. 6.6 Securing the RNC Anti-Seismic Supports on the Concrete Floor (N68-21-N)

N68-21-N Cabinet Installation Guide 6 Installing the RNC Cabinet on the ESD Floor (N68-21-N)


6-1

This describes how to drill holes, install the expansion bolt assemblies, and secure the RNCanti-seismic supports on the concrete floor.

5. 6.7 Securing the RNC Cabinet on the ESD Floor (N68-21-N)This describes how to secure the N68-21-N cabinet on the ESD floor.

6. 6.8 Combining RNC Cabinets (N68-21-N)This describes how to combine multiple N68-21-N cabinets.

6 Installing the RNC Cabinet on the ESD Floor (N68-21-N) N68-21-N Cabinet Installation Guide


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6.1 Materials Required for Installing the N68-21-N Cabineton the ESD Floor

The materials required for installing the N68-21-N cabinet on the ESD floor are the N68-21-Ncabinet and the anti-seismic support assembly.

Table 6-1 lists the materials required for installing the N68-21-N cabinet on the ESD floor.

Table 6-1 Materials required for installing the N68-21-N cabinet on the ESD floor

Cable Name Type Quantity Remarks

Anti-seismicsupportassembly

Support N+1, for Ncabinets

The support needs to be assembled on site.For the ESD floors of different heights (H),the installation of the supports is of thefollowing types:l For H ≥ 325 mm, no special processing

is required. This type of supportinstallation is described here.

l For 205 mm ≤ H < 325 mm, theinstallation method is the same as thatused when H ≥ 325 mm but the supportneeds to be customized.

l For H < 205 mm, the installation methodis different from that used in the previoustwo scenarios and the support needs to becustomized.

GuideRail

N, for Ncabinets

Each guide rail is 1,200 mm long. It needsto be cut on site.

N68-21-Ncabinet

RSRcabinet

1 -

RBRcabinet

0-1, dependson the siterequirements

6.2 Introduction to RNC Anti-Seismic Support AssemblyThe RNC anti-seismic support assembly needs to be assembled on site.

6.2.1 Components of RNC Anti-Seismic Support AssemblyThe components of the RNC anti-seismic support assembly are the beam/guide rail, push button,column connector, floating nut, column, base, angle bracket, and expansion bolt.

6.2.2 Fastening Push Buttons on the RNC Anti-Seismic SupportsThis describes how to fasten the push buttons for connection.

6.2.3 Cutting RNC Anti-Seismic Supports and Guide Rails



6-3

Before assembling the RNC anti-seismic support, cut the guide rails according to differentcabinet combinations. The guide rail cutting is of the following three types according to thenumber of the combined RNC cabinets: for an even number of cabinets in a row, for an oddnumber of cabinets in a row, and for a single cabinet. If the guide rails on site are already cut,skip this procedure.

6.2.1 Components of RNC Anti-Seismic Support AssemblyThe components of the RNC anti-seismic support assembly are the beam/guide rail, push button,column connector, floating nut, column, base, angle bracket, and expansion bolt.

Table 6-2 describes the components.

Table 6-2 Components of the RNC anti-seismic support assembly

Beam/guide railColumn

Push button

Base

Column connector

Angle bracket



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Floating nut

Expansion bolt

NOTE

l The beam/guide rail, column, base, column connector, and angle bracket are the main componentsof the RNC anti-seismic support.

l The push button is used to secure the components.

l The floating nut is used to fix the cabinet on the guide rail. There are teeth on the floating nut. Throughthe meshing of the teeth on the floating nut and the teeth on the guide rail, and with the aid of thespring of the plastic pad on the floating nut, the pre-tightening can be implemented.

l The expansion bolt is used to fix the support on the concrete ground.

6.2.2 Fastening Push Buttons on the RNC Anti-Seismic SupportsThis describes how to fasten the push buttons for connection.

ContextPush buttons are used to connect all components of the support. Both the push button and thestrut rail (beam/guide rail/column) have teeth. When the components are assembled, mesh theteeth of the push button and the components to pre-tighten them, as shown in Figure 6-1. Thefastened support is shockproof.

Figure 6-1 Teeth of the strut rail and the push button



6-5

Procedure

Step 1 Pre-tighten the push button. Press the bolt of the push button and meanwhile turn the bolt to 90°clockwise. With the rotation of the bolt, the nut also rotates 90° and the two pieces are pre-tightened, as shown in Figure 6-2.

Figure 6-2 Fastening the push button

(1) Bolt M10 (2) Washer (3) Nut

Step 2 Fasten the push button. Use a socket wrench to fasten the bolt to 40 N.m clockwise.

----End

6.2.3 Cutting RNC Anti-Seismic Supports and Guide RailsBefore assembling the RNC anti-seismic support, cut the guide rails according to differentcabinet combinations. The guide rail cutting is of the following three types according to thenumber of the combined RNC cabinets: for an even number of cabinets in a row, for an oddnumber of cabinets in a row, and for a single cabinet. If the guide rails on site are already cut,skip this procedure.

Prerequisitel The guide rails to be cut are ready.

l The tools required for the cutting are all ready. The tools refer to the tape measure, file,sand paper, and metal cutter.

ContextThe guide rail is 1,200 mm long and the cabinet is 600 mm wide. Therefore,

l For combining an even number of cabinets in a row, the guide rail cutting is unnecessary.Figure 6-3 shows the installation result of the guide rails for a single cabinet.



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Figure 6-3 Guide rail installation for combining an even number of cabinets in a row

l To combine an odd number of cabinets in a row, cut a 1,200 mm long guide rail into two600 mm long guide rails. Figure 6-4 shows the installation result of the guide rails for asingle cabinet.

Figure 6-4 Guide rail installation for combining an odd number of cabinets in a row

l To install one single cabinet, cut a 1,200 mm long guide rail into two 600 mm long guiderails. Figure 6-5 shows the installation result of the guide rails for a single cabinet.



6-7

Figure 6-5 Guide rail installation for installing a single cabinet

CAUTIONIn underfloor cabling mode, the guide rail may block part of the cabling. Therefore, whenunderfloor cabling is adopted and the cabling is of large quantity, ensure that guide rails do notblock the cabling beforehand.

Procedure

Step 1 Choose the type of guide rail cutting according to the type of cabinet combination.

If... Then...

An odd number of cabinets are combined ina row or a single cabinet is installed.

Go to Step 2.

An even number of cabinets are combined ina row.

The cutting of the guide rail is unnecessary.

Step 2 Use the metal cutter to cut a 1,200 mm long guide rail into two 600 mm long guide rails.

Step 3 Use the file or sand paper to smooth the guide rail.

Step 4 Brush antirust paint on the cross section.

----End



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6.3 Positioning the RNC Cabinet on the ESD Floor (N68-21-N)

This describes how to position the N68-21-N cabinet on the ESD floor. The main steps aredetermining the installation position of the cabinet, drawing lines, and drilling holes.

Prerequisitel The materials required for the installation are all ready. The material refers to the equipment

room layout.l The tools required for the installation are all ready. The tools refer to the tape measure,

panel lifter, electric motor saw, ink fountain, marking pen, percussion drill with the Ф16and Ф18 bits, vacuum cleaner, safety goggles, dustproof cover for electronic equipment,and rubber hammer.

Procedure

Step 1 Use the tape measure to determine the position for installing the cabinet according to sitemeasurement or dimensions provided in the equipment room layout, as show in Figure 6-6.



6-9

Figure 6-6 Equipment room layout (Unit: mm)

CAUTIONIf the place of installation has to be changed, it is recommended that the position fulfill thefollowing requirements:

l The distance between the two rows of combined cabinets is at least 1000 mm.

l The distance between a wall and its closest cabinet is at least 800 mm.

l The distance between a wall and its closest row of cabinets is at least 800 mm.

l The aisle for the equipment room is at least 1000 mm in width.



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Step 2 Draw lines.1. Determine the position of the datum line which is parallel to the front of the cabinets

according to the dimensions specified in the Equipment Room Layout.2. According to Figure 6-7 or Figure 6-8, use a tape measure to determine several marking

points. Use an ink fountain or a marking pen to draw two straight lines parallel to the datumline. The spacing between the two straight lines is 408 mm.

Figure 6-7 Installation holes for one cabinet (unit: mm)



6-11

Figure 6-8 Installation holes for a row of cabinets (unit: mm)

CAUTIONLine drawing is one of the primary jobs of the installation. The quality of the line drawingdirectly affects the quality of the whole cabinet installation.

3. On the two straight lines, determine the position of the installation hole for the first cabinet.With this position as reference, mark the installation holes for the other cabinets.

4. After all the drilling positions are marked, measure them again to ensure that they meet therequirements described in Figure 6-7 or Figure 6-8.

Step 3 Drill holes. Drill holes according to the lines drawn on the ESD floor. The diameter of each holeis 14 mm. For the positions of the holes, see Figure 6-7 or Figure 6-8.

Step 4 Cut the ESD floor. Use the panel lifter to move the ESD floor to be cut and cut the ESD floorin each position for cabling. Figure 6-9 shows the positions for cutting the ESD floor.



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Figure 6-9 Positions for cutting the ESD floor (unit: mm)

Step 5 Remove the supports of the ESD floor from the installation area.

----End

PostrequisiteClear the installation area for later installation.

6.4 Assembling RNC Anti-Seismic SupportsThis describes how to assemble the anti-seismic support using the components. The methods ofassembling the RNC anti-seismic supports are similar to those of combining an even number ofcabinets in a row, of combining an odd number of cabinets in a row, and of installing a singlecabinet. Here shows an example of installing a single cabinet.

Prerequisitel The components of the RNC anti-seismic support are all ready. The components are the

beam/guide rails, push buttons, column connectors, floating nuts, columns, bases, anglebrackets, and expansion bolts.

l The tools required for the installation are all ready. The tools refer to the horizontal ruler,torque wrench, and metal cutter.



6-13

l For the combination of an odd number of cabinets in a row or the installation of a singlecabinet, the guide rails are cut. For the combination of an even number of cabinets in a row,the guide rails do not need to be cut beforehand.

Procedure

Step 1 Put the bases on the concrete floor.

Step 2 Insert the columns until they reach the bottom of the bases, and pre-tighten the columns and thebases by using the push buttons, as shown in Figure 6-10.

Figure 6-10 Installing the columns

Step 3 Pre-tighten the column connectors onto the top of the columns by using push buttons. Ensurethat the top surface of the support plates soldered to the column connectors and the top surfaceof the columns are at the same level, as shown in Figure 6-11.



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Figure 6-11 Installing column connectors

Step 4 Put the two guide rails onto the column connectors. Pre-tighten the guide rails to the columnconnectors by using push buttons. Adjust the bases and ensure that each guide rail projects 10to 15 mm beyond the side of the column. Refer to Figure 6-12.

Figure 6-12 Installing the guide rails



6-15

Step 5 Pre-tighten the angle bracket to each column by using two push buttons. Ensure that the topsurface of each angle bracket and the top surface of each column are at the same level. Fourangle brackets need to be pre-tightened, as shown in Figure 6-13.

Figure 6-13 Installing angle brackets

Step 6 Place two beams onto the columns. Ensure that the beams are in close contact with thecorresponding angle brackets. Adjust the columns. Ensure that the distance between the twoguide rails is 457.5 mm. Pre-tighten each angle bracket and each beam by using two push buttons.

Step 7 Adjust the height of the columns. Ensure that the support is 3 to 5 mm higher than the lowersurface of the ESD floor.

Step 8 Adjust the beams and guide rails. Ensure that they are at the same level. The distance betweenthe two guide rails shall be 457.5±0.5 mm.

Step 9 Fasten all of the push buttons to 40 N.m.

Step 10 Confirm whether the surplus of the column connector needs to be cut.

If... Then...

The column connectors are already cut tothe proper length.

The assembling of the anti-seismic supportsis complete.



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If... Then...

The column connectors are not cut and thecutting tool is unavailable on site.

1. Loosen part of the push buttons.2. Move the columns inward along the guide

rails until the columns are aligned with theends of the guide rails.

3. Fasten the push buttons.The assembling of the anti-seismic supportsis complete.

For other situations. Go to Step 11.

Step 11 Cut the column connectors that project beyond the guide rails. Figure 6-14 shows the assembledsupport.

Figure 6-14 Assembled support (unit: mm)

CAUTIONAfter cutting the column connectors, smooth them and brush antirust paint on the cross section.

----End



6-17

6.5 Installing the Floating Nuts on RNC Anti-SeismicSupports

After the anti-seismic support is assembled, the floating nuts must be installed to fix the N68-21-N cabinet on the anti-seismic support.

Prerequisitel The RNC anti-seismic support is already assembled.

l The tools required for the installation are all ready. The tools refer to the torque wrenchand the rubber hammer.

Procedure

Step 1 Place the assembled support under the ESD floor and loosen the push buttons that connect thebases to the columns.

Step 2 Put the ESD floor back to the original position on the ESD floor rack and use a rubber hammerto hammer the ESD floor. Ensure that the top surface of the support clings to the ESD floor.

Step 3 Fasten the push buttons that connect the base to the columns to 40 N.m.

Step 4 Remove the ESD floor.

Step 5 Install four floating nuts at both ends of the two guide rails. Ensure that the floating nuts aresymmetrical around the center of the support. The positions of the floating nuts are shown inFigure 6-15.

Figure 6-15 Installing floating nuts (unit: mm)



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NOTE

l There are teeth on the floating nut. Through the meshing of the teeth on the floating nut and the teethon the guide rail, and with the aid of the spring of the plastic pad on the floating nut, the pre-tighteningcan be implemented.

l If you want to move a floating nut, push the plastic pad downwards and meanwhile move the floatingnut along the strut rail.

----End

6.6 Securing the RNC Anti-Seismic Supports on theConcrete Floor (N68-21-N)

This describes how to drill holes, install the expansion bolt assemblies, and secure the RNC anti-seismic supports on the concrete floor.

Prerequisitel The RNC anti-seismic supports to be secured are all ready.

l The tools required for the installation are all ready. The tools refer to the socket wrench,tape measure, panel lifter, ink fountain, marking pen, percussion drill with the Ф12 bit,vacuum cleaner, protective glasses, dustproof cover for electronic equipment, and rubberhammer.

Procedure

Step 1 Place the removed ESD floor on the assembled support. Align the installation holes for the ESDfloor with the floating nuts.

Step 2 Use a marking pen to mark the installation holes for the base, as shown in Figure 6-16.



6-19

Figure 6-16 Installing the base

(1) ESD floor (2) Installation hole for the ESD floor aligned with the floatingnut

(3) Installation hole for the base

Step 3 Remove the ESD floor and the support and mark the holes for drilling on the concrete floor.

NOTE

Hole drilling is one of the primary jobs of installation. The imprecise drilling will cause great inconvenienceto the later work. Therefore, to guarantee the quality of the hole drilling is to guarantee the quality of thewhole project.

l For some types of concrete floors on which the drilling is not suitable, consult the architectural engineersand get their permission before drilling holes.

l Check the thickness of the concrete floor before the drilling and note that penetrating the concrete flooris forbidden. If the concrete floor is not thick enough to hold the expansion bolt assemblies, change forother proper expansion bolt assemblies.

l Take dustproof measures on the electronic equipment before the drilling, for example, cover theelectronic equipment with dustproof cover.

l Clean the dust with a vacuum cleaner while drilling holes.

l Before removing the dustproof cover from the electronic equipment, clean up the pieces of concretethat have accumulated after drilling the hole.

l Wear safety goggles during the drilling to protect your eyes from the harm of dust.

1. Drill the marked holes on the concrete floor by using a Ф12 percussion drill.2. Set the auxiliary ruler to ensure that the drilling depth is 70 mm to 75 mm.3. Hold the drill stock tightly, and drill the marked holes vertically downwards. Use a vacuum

cleaner to clean up the dust during the drilling.4. Measure the depth of the hole. If the depth is not 70 mm to 75 mm, drill the hole again.



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5. If the hole is slant, drill the hole again.

Step 4 Install expansion bolt assemblies. Figure 6-17 shows an expansion bolt assembly.

Figure 6-17 Installing the expansion bolt assembly

(1) Bolt M8 x 75 (2) Large flat washer (3) Steel tube

(4) Plastic tube (5) Expansion tube (6) Nut

1. Insert the expansion bolt assembly vertically into the installation hole for the support.2. Use the rubber hammer to hammer the expansion bolt assembly until the steel tube is 3 mm

to 5 mm above the ground.3. Use the torque wrench to remove the bolt, and then remove the flat washer and the steel

tube. Store them for future use.

Step 5 Fix the support. Refer to Figure 6-18.



6-21

Figure 6-18 Fixing the N800 support

(1) Bolt M8 x 75 (2) Large flat washer (3) Steel tube

(4) Plastic tube (5) Expansion tube (6) Nut

CAUTIONWhen fixing the support, use the large flat washer to replace the flat washer that is provided withthe expansion bolt assembly.

1. Put the support in the installation position with the base installation hole aligned with thehole for expansion bolt assembly.

2. Insert the steel tube through the base installation hole into the hole for expansion boltassembly.

3. Install the large flat washer on the bolt, insert the bolt into the steel tube, and then tightenthe bolt to 25 N.m.

4. Repeat the steps to tighten other bolts to 25 N.m.

----End

6.7 Securing the RNC Cabinet on the ESD Floor (N68-21-N)This describes how to secure the N68-21-N cabinet on the ESD floor.

Prerequisitel The parts required for the installation are all ready. The equipment refers to the N68-21-N

cabinet.l The materials required for the installation are all ready. The materials refer to the knitting

bags or other protective materials, insulating pads, spring washers 12, plain washers,



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insulating tubes, cable ties, and the expansion bolts, steel tubes, and large flat washers ofthe expansion bolt assemblies.

l The tools required for the installation are all ready. The tools refer to the cross screwdriver,horizontal ruler, torque wrench, socket wrench, diagonal pliers, and multimeter.

Procedure

Step 1 Unload the cabinet.

Step 2 Remove the protection boards from the front and the back of the cabinet.

Step 3 Remove the metal packing accessories from the cabinet columns, as shown in Figure 6-19.

Figure 6-19 Removing metal packing accessories

Step 4 Remove the lowest subrack and store it properly for future use.

NOTEThe components installed in the lower part (5 U high) of the cabinet will interfere with the cabinetinstallation. 1 U = 44.45 mm Therefore, you must remove the components before the cabinet installationand reinstall them after the cabinet installation.

1. On the back of the subrack, remove the bolt M3 on the right of the plastic cover of thepower cable terminal, and loosen the bolt M3 on the left until the plastic cover is movable.Do not remove the bolt M3 on the left. Refer to Figure 6-20.



6-23

Figure 6-20 Back view of the subrack

(1) Monitoring cable of the power distribution box (2) Power cable (3) PGND cable

(4) Plastic cover (5) Bolt M3 (6) Board frame

2. Remove the power cables which are connected to the back of the subrack. Figure 6-20shows the positions of the power cables.

CAUTIONRemember the installation positions of the power cables when removing the cables becauseyou need to install the power cables back later.

3. From the back of the subrack, remove the PGND cables and the monitoring cable of thepower distribution box. Figure 6-20 shows the positions of the cables.

4. Use the cable ties to bind these cables to the mounting bars, and properly store the boltsand nuts for future use.

5. In the front of the cabinet, use the cross screwdriver to remove all the eight bolts M6 x 12that fix the subrack to the cabinet, and store the bolts for future use.

CAUTIONThree persons are required to remove the subrack. Ensure the personnel safety.



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6. One person pushes the subrack out along the guide rail from the back of the cabinet. Theother two persons hold the mounting ears and the bottom of the subrack to pull the subrackout of the cabinet from the front of the cabinet.

7. Keep the subrack properly for later installation.

Step 5 Before fixing a cabinet, restore the ESD floor under the cabinet and align the installation holesin the ESD floor with the floating nuts.

Step 6 Lay two insulating pads for each cabinet on the floor. Then align the installation holes of theinsulating pads with those of the cabinet, as shown in Figure 6-21.

Figure 6-21 Fixing the cabinet to the support

(1) Bolt M12 x 80 (2) Spring washer 12 (3) Large flat washer

(4) Thick washer (5) Insulating washer (6) Steel tube

(7) Cabinet (8) Insulating pad (9) ESD floor

(10) Support

Step 7 Put the cabinet in the planned position. Align the installation holes in the bottom of the cabinetwith those of the insulating pad.



6-25

Step 8 Put the insulating washer, thick washer, and steel tube on the installation hole in turn. Ensurethat the convex of the insulating washer faces downwards.

Step 9 Fit the spring washer 12 and large flat washer on the bolt. Insert the bolt through the cabinetinstallation hole into the floating nut in the beam on the support. Use the torque wrench to pre-tighten the bolt.

Step 10 Repeat Step 9 and Step 10 to install all the four bolts. Diagonally fasten the four bolts to 40N.m. Figure 6-22 shows the cabinet fixed to the support.



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Figure 6-22 Cabinet fixed to the support

Step 11 Measure the resistance between the fixing bolt and the grounding bolt at the bottom of thecabinet.1. Set the multimeter to the megohm range.2. Measure the resistance between the fixing bolt and the grounding bolt at the rack, as shown

in Figure 6-23.



6-27

Figure 6-23 Testing the insulation of the RNC cabinet

1 Resistance tester of the multimeter 2 Fixing bolt 3 Grounding bolt

If... Then...

The resistance ≥ 5 megohm, The cabinet is insulated from the support. End this test.

The resistance < 5 megohm, The cabinet is not insulated from the support. Go to Step 12.

Step 12 Uninstall the cabinet.

Step 13 Check that all insulating parts are installed and in good condition.The insulating parts refer to the insulating pads and insulating tubes.

Step 14 Reinstall the cabinet.

Step 15 Go to Step 11, and perform the insulating test again until the resistance is at least 5 megohm.

Step 16 Reinstall the subrack that has been removed in the cabinet.1. Two persons hold the mounting ears and the bottom of the subrack and push the subrack

into the cabinet along the guide rail. Use the eight bolts M6 x 12 to fix the subrack to thecabinet.

2. On the back of the cabinet, connect the PGND cables, power cables, and the monitoringcable of the power distribution box. Reinstall the two plastic covers, as shown in Figure6-20.

----End

6.8 Combining RNC Cabinets (N68-21-N)This describes how to combine multiple N68-21-N cabinets.



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PrerequisiteThe tools required for the installation are all ready. The tools refer to the wrench and the climbingladder.

ContextWhen the cabinet installation is complete, use the connecting plates to connect the adjacentcabinets. This ensures that all the cabinets are upright. The connecting plates are already installedon the top of the cabinets before delivery.

NOTE

The cabinets cannot be installed back to back. When multiple cabinets are installed, they can only beinstalled side by side.

Figure 6-24 and Figure 6-25 show how to fix the connecting plates to combine cabinets.

Figure 6-24 Fixing the connecting plates on the top of two adjacent cabinets



6-29

Figure 6-25 Installing connecting plates on the lintels of two adjacent cabinets

Procedure

Step 1 Reach the top of the cabinet by the aid of a climbing ladder.

Step 2 Remove the connecting plates from the top of the two adjacent cabinets, as shown in part ② ofFigure 6-24.

Step 3 Reinstall the connecting plates and connect them, as shown in parts ③ to ⑦ of Figure 6-24.

Step 4 Remove the connecting plates from the lintels of the two adjacent cabinets, as shown in part② of Figure 6-25.

Step 5 Reinstall the connecting plates and connect them, as shown in parts ③ to ⑤ of Figure 6-25.

Step 6 Check that the horizontal and vertical errors of the cabinets meet the requirements.

Step 7 Check that all of the cabinets are at the same level and stand side by side closely.

----End



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6-31

7 Installing Power Cables and PGND Cablesof the N68-21-N Cabinet

About This Chapter

This describes how to install the power cables and PGND cables that connect the N68-21-Ncabinet to the power distribution frame (PDF). When the cabinets are combined, you also needto install the PGND cables between the cabinets.

Prerequisitel The N68-21-N cabinets are installed.

l The power cables and PGND cables to be installed are all ready.

1. 7.4 Connecting Power Cables and PGND Cables Between the N68-21-N Cabinet and thePDFThe power cables and the PGND cable which connect the N68-21-N to the PDF can beinstalled in either overhead cabling method or underfloor cabling method. You can chooseeither cabling method according to the site requirements.

2. 7.5 Installing Inter-Cabinet(N68-21-N) PGND CablesThis describes how to connect the upper, middle and lower parts of the PGND busbar ofone cabinet to those of the neighboring cabinet by using PGND cables.

3. 7.6 Checking the Power-On Status of the RNC CabinetsThis describes how to check the power supplies to the RNC. After the checking, ensurethat the power supplies to the subracks, fan box, and boards are all working properly.

N68-21-N Cabinet Installation Guide7 Installing Power Cables and PGND Cables of the N68-21-

N Cabinet


7-1

7.1 RNC Power Cables and PGND Cables to Be InstalledThe power cables and PGND cables required to be installed on site are the external RNC powercables, external RNC PGND cables, and PGND cables for interconnecting RNC cabinets.

7.1.1 RNC Power CablesThe RNC power cables provide DC power for the cabinet and its internal modules. The RNCpower cables are of two categories: external power cables and internal power cables. The cablesare mandatory.

7.1.2 RNC PGND CablesThe PGND cables are used to ground the RNC cabinet and its internal modules. They aremandatory.

7.1.1 RNC Power CablesThe RNC power cables provide DC power for the cabinet and its internal modules. The RNCpower cables are of two categories: external power cables and internal power cables. The cablesare mandatory.

Description of RNC Power CablesThe RNC external power cables are used to connect the Power Distribution Frame (PDF) to theRNC power distribution box. The connectors of the external power cables need to be made onsite.

Table 7-1 shows the external power cables of the N68-21-N cabinet. Table 7-2 shows theexternal power cables of the N68E-22 cabinet.

Table 7-1 External power cables of the N68-21-N cabinet

CableName

Color Cross-SectionalArea

Type andInstallationPosition ofConnector 1


Quantity

External -48 VDCpowercable

Blue 25 mm2/35mm2

2-hole JGterminal/-48 V DCinput port on thepower distributionbox

Based on theactual sitemeasurement/-48 V DC outputport

4 per cabinet

External RTNpowercable

Black 25 mm2/35mm2

2-hole JG terminal/RTN input port onthe powerdistribution box

Based on theactual sitemeasurement/RTN outputport

4 per cabinet

7 Installing Power Cables and PGND Cables of the N68-21-N Cabinet N68-21-N Cabinet Installation Guide


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Table 7-2 External power cables of the N68E-22 cabinet

CableName




Quantity

External -48 VDCpowercable

Blue 25 mm2/35mm2

OT terminal/-48 VDC input port on thepower distributionbox

Based on theactual sitemeasurement/-48 V DC outputport

4 per cabinet

External RTNpowercable

Black 25 mm2/35mm2

OT terminal/RTNinput port on thepower distributionbox

Based on theactual sitemeasurement/RTN outputport

4 per cabinet

NOTE

The colors of the external power cables listed here are just for reference. The colors must be in accordancewith the special field requirements if any.

The internal power cables connect the power distribution boxes to the modules inside the RNCcabinet and thus supply the multiple outputs of the power distribution box to the modules. Theinternal power cables are installed before the RNC cabinet is delivered.

The connectors of the power cables of the N68E-22 cabinet are the same as those of the N68-21-N cabinet. Table 7-3 shows the internal power cables of the RNC.

Table 7-3 Internal power cables of the RNC

CableName



ConnectorType 2/InstallationPosition 2

Quantity

Internal–48 Vpowercable

Blue 8 mm2 OT terminal/–48 VDC output port onthe powerdistribution boxFor details, see lines1, 3, 5, 7, 9, 11 in11.4 Connections ofPower Cables andPGND Cables inthe RNC Cabinet.

OT terminal/DC input porton the subrackFor details, seelines 1, 3, 5, 7,9, 11 in 11.4Connections ofPower Cablesand PGNDCables in theRNC Cabinet.

2 persubrack


N Cabinet


7-3

CableName




Quantity

InternalRTNpowercable

Black 8 mm2 OT terminal/–48 VDC output port onthe powerdistribution boxFor details, see lines2, 4, 6, 8, 10, 12 in11.4 Connections ofPower Cables andPGND Cables inthe RNC Cabinet.

OT terminal/DC input porton the subrackFor details, seelines 2, 4, 6, 8,10, 12 in 11.4Connections ofPower Cablesand PGNDCables in theRNC Cabinet.

2 persubrack

AppearanceFigure 7-1 shows the internal power cable of the RNC.

Figure 7-1 -48 V/RTN internal power cable of the RNC

(1) OT terminal

Figure 7-2 shows the external power cable of the N68E-22 cabinet.

Figure 7-2 External power cable of the N68E-22 cabinet

(1) OT terminal

Figure 7-3 shows the external power cable of the N68-21-N cabinet.

Figure 7-3 External power cable of the N68-21-N cabinet

(1) OT terminal (2) 2-hole JG terminal



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7.1.2 RNC PGND CablesThe PGND cables are used to ground the RNC cabinet and its internal modules. They aremandatory.

Description of RNC PGND CablesThe external PGND cable is mandatory for the RNC cabinet. Each RNC cabinet is configuredwith one external PGND cable. When the cabinets are combined, three interconnection PGNDcables must be installed between every two adjacent cabinets. Other PGND cables are alreadyinstalled in the cabinet before delivery.

Table 7-4 describes the PGND cables of the N68-21-N cabinet.

Table 7-4 PGND cables of the N68-21-N cabinet

CableName




Quantity

ExternalPGNDcable

Green andyellow

25 mm2/35mm2

2-hole JGterminal/Groundingbolt at the topback of eachcabinet

Based on thesite survey/PGND outputport

1 percabinet

InterconnectionPGNDcable

Green andyellow

6 mm2 OT terminal/PGND Busbarof each RNCcabinetFor details,see lines 24 to26 inConnectionsof the powercables andPGND cablesin theN68-21-Ncabinet.

OT terminal/PGND Busbarof each RNCcabinetFor details, seelines 24 to 26 inConnections ofthe powercables andPGND cablesin the N68-21-N cabinet.

3 percouple ofadjacentcabinets


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CableName




Quantity

PGNDcable of thecabinetBusbar

Green andyellow


OT terminal/PGND wiringpost on thecabinet topFor details, seelines 20 to 21 inConnections ofthe powercables andPGND cablesin the N68-21-N cabinet.

2 percabinet

PGNDcable of thepowerdistributionbox

Green andyellow

6 mm2 OT terminal/PGND Busbarof each RNCcabinetFor details,see line 13 inConnectionsof the powercables andPGND cablesin theN68-21-Ncabinet.

OT terminal/port for PGNDcable on thepowerdistribution boxFor details, seeline 13 inConnections ofthe powercables andPGND cablesin the N68-21-N cabinet.

1 percabinet

PGNDcable of thesubrack

Green andyellow


OT terminal/port for PGNDcable on thesubrackFor details, seelines 14 to 19 inConnections ofthe powercables andPGND cablesin the N68-21-N cabinet.

2 persubrack



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CableName




Quantity

PGNDcable of thecabinetdoor

Green andyellow

6 mm2 OT terminal/groundingbolt on thebaseFor details,see lines 50 to57 inConnectionsof the powercables andPGND cablesin theN68-21-Ncabinet.

OT terminal/grounding bolton each doorFor details, seelines 50 to 57 inConnections ofthe powercables andPGND cablesin the N68-21-N cabinet.

8 percabinet

Table 7-5 shows the PGND cables of the N68E-22 cabinet.

Table 7-5 PGND cables of the N68E-22 cabinet

CableName




Quantity

ExternalPGNDcable

Green andyellow

25 mm2/35mm2

OT terminal/groundingbolt at the topback of eachcabinet

Determine theterminal typebased on the sitesurvey/outputterminal of thePGND cable

1 percabinet


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CableName




Quantity

InterconnectionPGNDcable

Green andyellow

6 mm2 OT terminal/groundinghole of themounting barof the RNCcabinetFor details,see lines 24 to26 inConnectionsof the powercables andPGND cablesin theN68E-22cabinet.

OT terminal/grounding holein the mountingbar of the RNCcabinetFor details, seelines 24 to 26 inConnections ofthe powercables andPGND cablesin the N68E-22cabinet.

3 betweenadjacentcabinets

PGNDcable of thepowerdistributionbox

Green andyellow

6 mm2 OT terminal/groundinghole in themounting barof the RNCcabinetFor details,see line 13 inConnectionsof the powercables andPGND cablesin theN68E-22cabinet.

OT terminal/terminal for thePGND cable onthe powerdistribution boxFor details, seeline 13 inConnections ofthe powercables andPGND cablesin the N68E-22cabinet.

1 percabinet



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CableName




Quantity

PGNDcable of thesubrack

Green andyellow

6 mm2 OT terminal/groundinghole in themounting barof the RNCcabinetFor details,see lines 14 to19 inConnectionsof the powercables andPGND cablesin theN68E-22cabinet.

OT terminal/port for thePGND cable onthe subrackFor details, seelines 14 to 19 inConnections ofthe powercables andPGND cablesin the N68E-22cabinet.

2 persubrack

PGNDcables ofcabinetdoors

Green andyellow

6 mm2 OT terminal/groundinghole in thecolumn of theRNC cabinetFor details,see lines 50 to57 inConnectionsof the powercables andPGND cablesin theN68E-22cabinet.

OT terminal/grounding bolton each doorFor details, seelines 50 to 57 inConnections ofthe powercables andPGND cablesin the N68E-22cabinet.

8 percabinet

NOTE

l The minimum bending radius of the RNC external PGND cable is 30 mm.

l The colors of the PGND cables listed here are just for reference. For special requirements, the colorscan be changed accordingly.

AppearanceFigure 7-4 shows the external PGND cable of the N68-21-N cabinet.


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Figure 7-4 External PGND cable of the N68-21-N cabinet

(1) OT terminal (2) 2-hole JG terminal

Figure 7-5 shows the external PGND cable of the N68E-22 cabinet.

Figure 7-5 External PGND cable of the N68E-22 cabinet

(1) OT terminal

Figure 7-6 shows the internal RNC PGND cable.

Figure 7-6 Internal RNC PGND cable

(1) OT terminal

7.2 Connections of RNC Power Cables and PGND CablesThis describes how the power cables and the PGND cables connect the RNC to the powerdistribution frame (PDF) and how the PGND cables interconnect the RNC cabinets.

Figure 7-7 shows the connections of the power cables and PGND cables.

Figure 7-7 Cable connections



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NOTE

l Each RNC cabinet is configured with nine cables, that is four -48 V power cables, four RTN powercables, and one PGND cable.

l It is recommended that the PGND cables of the RNC cabinets be connected to the closest groundingbar. When the PDF is far from the RNC cabinets, for example, the PDF is not in the same equipmentroom as the RNC cabinets, connect the PGND cables of the RNC cabinets to the closest groundingbar co-grounded with the PDF rather than connect the PGND cables directly with the PDF.

7.3 Installation Specifications for RNC Power Cables andPGND Cables

When installing the RNC power cables and PGND cables, ensure that the requirements forrouting and binding the cables are met.

Requirements for Routing Cablesl Before routing the cables, wrap the connectors by using the insulating tapes to prevent the

connectors from contacting the terminals connected to the PDF.l While routing cables, take the capacity expansion into consideration.

l Separate the power cables and PGND cables from the signal cables.

l When power cables or PGND cables are laid parallel to signal cables, leave at least 10 mmbetween the power cables or PGND cables and the signal cables inside the cabinet and atleast 100 mm between them outside the cabinet.

l Ensure that the bend radius of the power cables and PGND cables is five times longer thanthe diameter of the cable.

l In the underfloor cabling mode, reserve extra length of the power cables outside the cableholes of the power distribution box on top of the cabinet. The purpose is to help plug inand pull out the cables. In addition, flush the cables at the top of the cabinet.

l When connecting power cables to the terminals of the power distribution box, route themin a straight manner and ensure that The cables are routed smoothly without any tangling.

Requirements for Binding Cablesl Bind the power cables and PGND cables separately from the signal cables.

l Bind the power cables and PGND cables every 200 mm.

l Determine the types of cable ties (100 mm, 150 mm, 300 mm, or 295 mm) based on thenumber of cables.

l Orient the cable ties to the same direction.

l Bind the cables tightly. Then cut off the surplus parts completely for indoor cable ties andleave 3 mm to 5 mm for outdoor cable ties. Trim the tails of the cable ties.

7.4 Connecting Power Cables and PGND Cables Betweenthe N68-21-N Cabinet and the PDF

The power cables and the PGND cable which connect the N68-21-N to the PDF can be installedin either overhead cabling method or underfloor cabling method. You can choose either cablingmethod according to the site requirements.


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7.4.2 Installing Power Cables and the PGND Cable Between the N68-21-N Cabinet and the PDF(Overhead Cabling)This describes how to install the power cables and the PGND cable by overhead cabling modeto connect the N68-21-N cabinet to the PDF.

7.4.3 Installing Power Cables and PGND Cables Between the N68-21-N Cabinet and PDF(Underfloor Cabling)This describes how to install power cables and the PGND cable in underfloor cabling mode toconnect the N68-21-N cabinet to the PDF.

7.4.1 Overhead and Underfloor Cabling ModesThe cables can be connected to the RNC cabinet in either overhead cabling mode or underfloorcabling mode.

Based on actual scenarios, the cabling can be of either overhead or underfloor cabling mode.For overhead cabling mode, the cables are led upward out of the cabinet through the upper cablehole or other channels; for underfloor cabling mode, the cables are led downward out of thecabinet through the lower cable hole or other channels. Here shows an example of overhead/underfloor cabling mode through the upper/lower cable hole.

External cables can be connected to the RNC cabinet either through the upper cable hole or thelower cable hole. Each corner on the top and the bottom of the cabinet provides a rectangularcabling hole, as shown in Figure 7-8.



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Figure 7-8 Cable holes of the RNC cabinet

If the cable hole is covered with the rodent-proof cover, you need to remove the cover beforethe cabling. Then, lead the cables through the cable hole and bind the cables. Replace the rodent-proof cover on the cable hole, and mark the area to be cut based on the cross section of the boundcables. Then, use the scissors to cut the area. At last, replace the rodent-proof cover. Ensure thatthe bound cables fit in well with the cover, that is, the cables are fully engaged and no sideclearance is left.

Overhead CablingThe cables are fixed through the cable holes of the two sides at the top of the cabinet. Route thecables along both sides of the cabinet in the downward way to the related devices. The overheadcabling mode is suitable for the equipment room with the cement floor, as shown in Figure7-9.


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Figure 7-9 Overhead cabling mode

Underfloor Cabling

The cables are fixed through the cable holes of the two sides at the bottom of the cabinet. Laythe cables along the both sides of the cabinet in the upward way to the related devices. Theunderfloor cabling mode is suitable for the equipment room with the ESD floor, as shown inFigure 7-10. When the underfloor cabling mode is applied, ensure that the height of the piledcables cannot exceed the 3/4 height of the space under the ESD floor.

Figure 7-10 Underfloor cabling mode



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7.4.2 Installing Power Cables and the PGND Cable Between theN68-21-N Cabinet and the PDF (Overhead Cabling)

This describes how to install the power cables and the PGND cable by overhead cabling modeto connect the N68-21-N cabinet to the PDF.

Prerequisitel The N68-21-N cabinet to which the power cables and the PGND cable are connected is

ready.

l All the related power distribution switches on the PDF are set to OFF.

l All the power distribution switches on the power distribution boxes are set to OFF.

l The parts required for the installation are all ready. The parts refer to the power cables andthe PGND cable.

l The materials required for the installation are cable ties.

l The tools required for the installation are all ready. The tools refer to the diagonal pliers,handsaw, cable cutter, wrench, and cross screwdriver.

Context

Here shows an example of the PDF shipped with the RNC. For details on how to install cablesin the PDF, refer to the documents shipped with the PDF. If other types of DC power distributioncabinets are used on site, refer to the relevant documents for cable installation.

Install the power cables and the PGND cable between the N68-21-N cabinet and the PDF byoverhead cabling. Figure 7-11 shows the installation of the N68-21-N cabinet.

Figure 7-11 Install the power cables and the PGND cable between the N68-21-N cabinet andthe PDF (overhead cabling)


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Procedure

Step 1 Determine the length of each power cable and PGND cable according to related engineeringdesign files or by site measurement.

Step 2 Lay out the power cables and PGND cables on site, and use the tape measure or other measuringtools to measure an appropriate length of cable. Use the handsaw (teeth space: 0.8 mm) or cablecutter (KT35) to cut off the cable of the length a little longer than necessity.

CAUTIONIf you find a cable not long enough during the installation, replace it with a longer one. Do notconnect another cable to the short one by adding a connector or by welding.

Step 3 Attach temporary labels to both ends of the cables. The contents of the temporary labels areuncertain because the temporary labels are used only for distinguishing the cables after thelayout.

Step 4 Lay the power cables and the PGND cable according to the requirements for routing cables andengineering requirements.1. Lead the power cables and PGND cable out of the PDF through the upper cable hole in the

PDF.

CAUTIONl If the distance between the cable rack and the top of the cabinet exceeds 800 mm, a

ladder is required to lead the cables down to the cabinet.l Ensure that the bend radius is five times longer than the diameter of the cable.

2. Lead the cables onto the cable rack.3. Lead the cables to the top of each N68-21-N cabinet along the cable rack.

Step 5 Connect the power cables and PGND cable to the N68-21-N cabinet.1. Find the cable terminals from the accessories, and then assemble the terminals for the power

cables and the PGND cable on site. For how to assemble the terminals, refer to Assemblingthe JG Terminal and the Power Cable.

2. Fix the terminal of the PGND cable to the grounding bolts at the top back of the cabinet.

The grounding bolt is labeled .3. Lead the RTN power cables and the -48 V power cables through the cable hole on the top

of the cabinet until they reach the input wiring terminals. The RTN power cable is connectedto the wiring terminal labeled ＋, and the -48 V power cable is connected to the wiringterminal labeled -. Fasten the screws.



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CAUTIONThe input terminals 2(+),2(-) do not allow any input power, and thus you need to connectthe RTN and -48 V power cables to input wiring terminals 1(+), 1(-), and 3(+), 3(-).

Step 6 Connect the other end of the power cable to the PDF, and at the same time connect the other endof the PGDN cable to the PDF or close to the grounding bar.

1. Remove the insulating tapes from the connectors of the cables. Determine the length of thecables according to their installation positions, and then cut off the extra parts.

2. Make the connectors of power cables and the PGND cables according to the cableconnection principle of the PDF and the engineering requirements.

3. Connect the PGND cable, RTN power cables, and -48 V power cables to the correspondingwiring posts in the PDF. Ensure that all screws are fastened.

----End


7.4.3 Installing Power Cables and PGND Cables Between theN68-21-N Cabinet and PDF (Underfloor Cabling)

This describes how to install power cables and the PGND cable in underfloor cabling mode toconnect the N68-21-N cabinet to the PDF.

Prerequisitel The N68-21-N cabinet to which the power cables and the PGND cable are connected is

ready.



l The parts required for the installation are all ready. The parts refer to the power cables andthe PGND cable.

l The materials required for the installation are all ready. The materials refer to the cable ties.

l The tools required for the installation are all ready. The tools refer to the diagonal pliers,cable cutter, wrench, and cross screwdriver.

Context

Here shows an example of the PDF shipped with the RNC. For details about installing cables inthe PDF, refer to the documents shipped with the PDF. If other types of DC power distributioncabinets are used on site, refer to the relevant documents for cable installation.

Install the power cables and the PGND cable between the N68-21-N cabinet and PDF throughunderfloor cabling.Figure 7-12 shows the installation at the N68-21-N cabinet side.


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Figure 7-12 Installing power cables and the PGND cable between the N68-21-N cabinet andPDF (underfloor cabling)

Procedure

Step 1 According to related engineering design files or site measurement, determine the length of eachrequired power cable.

Step 2 Lay out the coiled power cables and PGND cables on site. Use the tape measure or othermeasuring tools to measure appropriate length. Then, use the handsaw (teeth space: 0.8 mm) orcable cutter (KT35) to cut off the cable of the length a little longer than necessity.

CAUTIONIf you find a cable not long enough during the installation, replace it with a longer one. Do notconnect another cable to the short one by adding a connector or by welding.



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Step 3 Attach temporary labels to both ends of the cables. The contents of the temporary labels areunspecified because the temporary labels are used only for distinguishing the cables after thelayout.

Step 4 Lay the power cables and the PGND cable according to the requirements for routing cables andengineering requirements.

1. Lead the cables out of the PDF through the lower cable hole in the PDF until they reachthe lower cable holes of the N68-21-N cabinets through under the ESD floor. For theposition of the lower cable hole of the N68-21-N cabinet, refer to 7.4.1 Overhead andUnderfloor Cabling Modes.

2. Lead the cables into the N68-21-N cabinet through the lower cable hole, route the cablesupwards along the back column, and then lead the cables to the top of the cabinet throughthe upper cable hole.

3. Cut the plastic rodent-proof cover plates of appropriate sizes to cover the upper and lowercable holes. Use screws to fix the cover plate that covers the upper cable hole.

Step 5 Connect the power cables and PGND cable to the N68-21-N cabinet.

1. Make the JG terminals for the power cables and the PGND cables of the N68-21-N cabinet.Refer to Assembling the JG Terminal and the Power Cable

2. Fix the terminals of the PGND cable to the grounding bolt at the top back of the cabinet.

The grounding bolts are labeled .

3. Lead the RTN and -48 V power cables into the cabinet through the upper cable hole, andthen route them to the input wiring terminals. Connect the RTN power cables to the wiringterminals that are labeled +, and connect the -48V power cables to the wiring terminalslabeled -. Fasten the screws.

CAUTIONInput power is not allowed in the input wiring terminals labeled 2(+),2(-). Connect the RTNand -48 V power cables to the input wiring terminals labeled 1(+),1(-) and 3(+),3(-).

Step 6 Connect the power cables to output terminals of the PDF.

1. Remove the insulating tapes from the connectors of the cables. Determine the length of thecables according to their installation positions, and then cut off the extra parts.

2. According to the cable connection principle of the PDF and the engineering requirements,determine the types of the connectors of the power cables and PGND cables so as to makethe connectors accordingly.

3. Connect the PGND cable, RTN power cables, and -48 V power cables to the correspondingwiring posts in the PDF.

----End



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7.5 Installing Inter-Cabinet(N68-21-N) PGND CablesThis describes how to connect the upper, middle and lower parts of the PGND busbar of onecabinet to those of the neighboring cabinet by using PGND cables.

Prerequisitel The RNC cabinet to which the PGND cable is connected is ready.



ProcedureAs shown in Figure 7-13, connect the upper, middle and lower parts of the PGND busbar ofone cabinet to those of the neighboring cabinet by using inter-cabinet PGND cables.

Figure 7-13 Inter-cabinet (68-21-N) PGND cables

----End


7.6 Checking the Power-On Status of the RNC CabinetsThis describes how to check the power supplies to the RNC. After the checking, ensure that thepower supplies to the subracks, fan box, and boards are all working properly.



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Prerequisitel The RNC cabinet is connected to the PDF by power cables and PGND cables.

l All the internal power cables and PGND cables are installed.

l All subracks within the cabinet, the fan box within the subrack, and boards are installed.

l The multimeter is ready.

Context

The RNC cabinet uses the DC power supply. For the requirements of the cabinet power supply,refer to Technical Specifications for the RNC Power Distribution Box.

CAUTIONCorrectly put on the ESD wrist strap and ensure that the ESD wrist strap is properly connectedto the ESD connector on the cabinet.

Procedure

Step 1 On the PDF, set the status of the corresponding output switch to be OFF.On the powerdistribution box of the RNC cabinet, set the status of the corresponding output switch to beOFF.

Step 2 Set the multimeter to the state of resistance measurement. Use the multimeter to measure theoutput terminal on the PDF and the input and output terminals of the power distribution box onthe RNC cabinet. Check that no short circuit exists between the working power supply of-48V and the working location RTN or between the working power supply of -48V and thePGND.

Step 3 On the PDF, set the status of the corresponding output switch to be ON. On the power distributionbox of the RNC cabinet, set the status of the corresponding output switch to be OFF.At this time, the power distribution box turns to the self-test mode. The RUN and ALM LEDsare on at the same time and the buzzer buzzes. After the self-test is complete, the powerdistribution box requests the SCUa board for registry until the registry succeeds. During therequest process, the RUN LED on the power distribution box blinks at 2 Hz. When the requestfor registry succeeds, the RUN LED blinks at 0.5 Hz. For the description about the LED statuson the power distribution box, refer to LEDs on the Front Panel of the RNC PowerDistribution Box.

Step 4 Set the multimeter to the state of voltage measurement. Use the multimeter to measure the outputvoltage of the PDF or the input voltage of the power distribution box within the cabinet. Ensurethat the voltage ranges from -57 V to -40 V before you proceed the next test item.

Step 5 Take a subrack as a unit and set the corresponding switch of the power distribution box withinthe RNC cabinet to ON.

Step 6 Set the multimeter to the state of voltage measurement. Use the multimeter to measure the voltagerange. Check whether the output power range of the subrack is within the allowed voltage range,that is, from -57 V to -40 V. At the same time, check whether the fan box within the subrackand the power supply of the boards within the subrack can work properly.


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l After the subrack is powered on, the green STATUS LED on the panel of the fan box blinks.In case of abnormality, turn off the corresponding switch of the power distribution boximmediately, turn off the switch of the PDF, and check whether the output voltage of thepower distribution box is abnormal and whether the power cables are wrongly installed. Forthe description about the LED status of the fan box, refer to LED on the Fan Box.

l After the subrack is powered on, the RUN LED on the panel of the board is on steady orblinks. If none of the LEDs for a board is on after the subrack is powered on, the slot or theboard itself might be faulty. Then, contact Huawei for technical support. For the descriptionabout the LEDs on boards, refer to RNC LEDs.

l In case of abnormality, that is, when all of the LEDs for all boards within a subrack is off,turn off the corresponding switch of the power distribution box immediately, and then turnoff the switch of the PDF. Check whether the output voltage of the power distribution boxis abnormal and whether the power cables are wrongly installed.

Step 7 Repeat Step 5 through Step 6 until the tests for the power-on status of the three subracks withinone RNC cabinet are complete.

Step 8 Repeat Step 1 through Step 7 to measure the power supply for other RNC cabinets.

----End

PostrequisiteRecord the test results in the checklist as shown in Data Sheets of RNC HardwareInstallation.



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8 Installing Cabinet (N68-21-N) Accessories

About This Chapter

This describes how to install the side doors, front doors, back doors of the N68-21-N cabinet,and how to install PGND cables to those doors.

Prerequisitel The cabinet is installed.

l Accessories of the cabinet are delivered to the site.

1. 8.2 Installing Side Doors of the N68-21-N CabinetA single N68-21-N cabinet has four side doors. When multiple N68-21-N cabinets arecombined in line, install only two side doors respectively on the leftmost side and therightmost side. When the N68-21-N cabinet is combined with another type of cabinet,install side doors where the cabinets are combined.

2. 8.3 Installing Front/Back Doors of the N68-21-N CabinetEach N68-21-N cabinet needs to be installed with two front doors and two back doors, thatis, altogether four doors at the front and back.

3. 8.4 Installing PGND Cables to Doors of the Cabinet (N68-21-N)The front, back, and side doors of the cabinet should be installed with PGND cables.

N68-21-N Cabinet Installation Guide 8 Installing Cabinet (N68-21-N) Accessories


8-1

8.1 Cabinet Accessories to Be Installed (N68-21-N)Accessories of the N68-21-N cabinet to be installed are the front doors, back doors, side doors,and PGND cables connected to the cabinet doors.

Table 8-1 lists the cabinet accessories to be installed.

Table 8-1 Cabinet accessories to be installed (N68-21-N)

Name Installation Position Remarks

Side doors Refer to 11.2 Exploded View ofthe N68-21-N Cabinet.

In total four side doors are installed fora cabinet row, two side doors on the leftside of the leftmost cabinet and twoside doors on the right side of therightmost cabinet.

Front and backdoors

Double-swing structure is used for thefront doors and the back doors. Themethods of installing the doors are thesame.

PGND cablesconnected to thecabinet doors

Refer to the PGND cables that connectfront/back/side doors to cabinet base.

Labels Including row labels, column labels,and RNC product labels.

8.2 Installing Side Doors of the N68-21-N CabinetA single N68-21-N cabinet has four side doors. When multiple N68-21-N cabinets are combinedin line, install only two side doors respectively on the leftmost side and the rightmost side. Whenthe N68-21-N cabinet is combined with another type of cabinet, install side doors where thecabinets are combined.

Prerequisitel The parts required for the installation are all ready. The parts refer to the side doors to be

installed and the sunk screws M6 x 12.l The tools required for the installation are all ready. The tool refers to the cross screwdriver

with a long handle.

ContextFigure 8-1 shows how to install side doors of the N68-21-N cabinet.

8 Installing Cabinet (N68-21-N) Accessories N68-21-N Cabinet Installation Guide


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Figure 8-1 Installing side doors of the N68-21-N cabinet

(1) Sunk screw M6 x 12 (2) Installation hole for sunk screw on side door (3) Floating nut(4) Installation notch on side door (5) Combination screw M6 x 16

Procedure

Step 1 Loosen the screw assemblies M6 x 16 on the cabinet.

Step 2 Fit the three installation notches downwards to the screw assemblies M6 x 16.

CAUTIONThe direction of the installation notches is shown in Figure 8-1.

Step 3 Fix the side door in the installation notches in the upper and lower doorheads.

Step 4 Tighten the two sunk screws M6 x 12 and the three screw assemblies M6 x 16.

----End




8-3

8.3 Installing Front/Back Doors of the N68-21-N CabinetEach N68-21-N cabinet needs to be installed with two front doors and two back doors, that is,altogether four doors at the front and back.

Prerequisitel For the convenience of operation, install the front doors and the back doors after the other

hardware is installed.l The front doors and the back doors to be installed are ready.

ContextFigure 8-2 shows how to install the front and the back doors of the N68-21-N cabinet.

Figure 8-2 Installing the front/back doors of the N68-21-N cabinet

(1) Upper movable pivot (2) Lower pivot (3) Pivot hole



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Procedure

Step 1 Insert the lower pivot of the door into the pivot hole in the lower lintel of the cabinet.

Step 2 Pull down the upper movable hole, align the hole of the movable pivot with the pivot hole in theupper lintel of the cabinet, and then release the movable pivot to fix the door onto the cabinet.

----End

PostrequisiteRecord the installation results in the checklist as shown in Data Sheets of RNC HardwareInstallation.

8.4 Installing PGND Cables to Doors of the Cabinet (N68-21-N)

The front, back, and side doors of the cabinet should be installed with PGND cables.

Prerequisitel The PGND cables to be installed are ready.

l The tools required for the installation are all ready. The tools refer to the cross screwdriverand the wrench.

ContextFigure 8-3 shows the installation positions of the PGND cables on the N68-21-N cabinet doors.



8-5

Figure 8-3 Installing PGND cables to the N68-21-N cabinet doors

1 Front/back door of thecabinet

2 Side door 3 Grounding bolt on front/back doors

4 PGND cable on thefront/back doors

5 Grounding bolt on the sidedoor

6 PGND cable on theside door

7 Grounding bolt on the base 8 Base

Procedure

Step 1 Connect the PGND cables on the side doors of the cabinet. As shown in Figure 8-3, in eachcabinet row, connect the leftmost two side doors using the PGND cable and the rightmost twoside doors using the PGND cable.

Step 2 Connect the front doors to the back doors of each cabinet using the PGND cables, as showninFigure 8-3.

----End



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9 Labeling RNC Cabinets

The labels to be attached to the RNC cabinet are the row labels, column labels, and productlabels.

ContextFigure 9-1 shows the row labels.

Figure 9-1 Row labels

Figure 9-2 shows the column labels.

Figure 9-2 Column labels

The product label is an oblong one and identifies the RNC product. Figure 9-3 shows where theproduct label shall be attached.

N68-21-N Cabinet Installation Guide 9 Labeling RNC Cabinets


9-1

Figure 9-3 Position for attaching the product label

Procedure

Step 1 Attach row labels.

Attach row labels to the side doors on the two ends of each cabinet row.

When there is more than one row of cabinets, attach the label A to the side doors at the two endsof the cabinet row which is closest to the door of the equipment room, the label B to the secondrow, the label C to the third row, and so on.

Step 2 Attach column labels.

The column label is attached on the doorhead of the cabinet front. Attach the label 00 to the firstcabinet near the main aisle, 01 to the second one, 02 to the third one, and so on.

Step 3 Check that product labels are available on the front/back doors of the cabinet. Otherwise, obtainthe product labels from delivered accessories and attach them to the top left of each front/backdoor of the cabinet. Refer to Figure 9-3.

----End


9 Labeling RNC Cabinets N68-21-N Cabinet Installation Guide


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10 Labeling Power Cables and PGNDCables of the RNC

After the power cables and PGND cables of the RNCs are installed, remove the temporary labelsfrom the cables and attach engineering labels to these cables.

Prerequisitel All the power cables and PGND cables are installed.

l The materials are all ready. The materials refer to the ball pen and the label paper.

Procedure

Step 1 Remove the temporary labels from the power cables.

Step 2 For how to make the engineering labels for the power cables and the PGND cables, refer toLabeling Power Cables.

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N68-21-N Cabinet Installation Guide 10 Labeling Power Cables and PGND Cables of the RNC


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11 Appendix

About This Chapter

This provides the exploded view of the N68-21-N cabinet and an installation checklist.

11.1 Checklist for RNC Cabinet InstallationThis describes the items and specifications for checking the installation of the RNC cabinet.

11.2 Exploded View of the N68-21-N CabinetThis shows the components of the N68-21-N cabinet and the parts on the cabinet.

11.3 Layout of Power Switches on the RNC CabinetThe power distribution box of the RNC cabinet provides 20 (10 x 2) power outputs. The 6 (3 x2) power outputs of RNC the power distribution box provide power for specific internalcomponents in the RNC cabinet.

11.4 Connections of Power Cables and PGND Cables in the RNC CabinetThe power cables and PGND cables in the RSR cabinet are connected the same way as those inthe RBR cabinet.

N68-21-N Cabinet Installation Guide 11 Appendix


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11.1 Checklist for RNC Cabinet InstallationThis describes the items and specifications for checking the installation of the RNC cabinet.

Table 11-1 lists the items and specifications for checking the installation of the RNC cabinet.

Table 11-1 Checked items for RNC cabinet installation

No. Checked Item

1 The cabinets are arranged in accordance with the engineering design.

2 The supports are positioned and spaced in accordance with the drawing of theinstallation holes. (This item applies to the cabinet installation on the ESD floor.)

3 All supports are fixed to the floor correctly. (This item applies to the cabinetinstallation on the ESD floor.)

4 All components of the supports are installed correctly. (This item applies to thecabinet installation on the ESD floor.)

5 All floor holders are installed at the same height. (This item applies to the cabinetinstallation on the ESD floor supported by floor holders.)

6 Each cabinet is well insulated from the support or the floor.

7 All plastic boards are installed on the top and bottom of the cabinets.

8 All cabinet accessories are installed, including front door, back door, and side doors.

9 The row labels, column labels, and product labels are attached to the specifiedpositions.

10 The ESD wrist strap is connected to the ESD bonding point on the cabinet.

11 All connecting plates are installed for combining cabinets.

12 Insulation is performed for shockproof parts between multiple rows of cabinets.

13 All bolts are fixed with flat washers and spring washers in a correct order.

14 The cabinets are stable and orderly.

15 All the adjacent cabinets stand side by side in a straight line.

16 The vertical deviation of cabinet installation is less than 3 mm.

17 All cabinet side doors facing the aisle are aligned with the error less than 5 mm.

18 The surfaces of the cabinets are clean without any fingerprint or smudge. There isno dust, excessive cable tie ends or other sundries either inside or outside eachcabinet.

19 All kinds of labels are correct, legible and intact.

20 The front and back doors of the cabinets are easy to open or close.

11 Appendix N68-21-N Cabinet Installation Guide


Issue 01 (2008-03-20)

No. Checked Item

21 The modules in one cabinet are aligned from the top down.

22 All the filler panels are installed.

23 All boards are installed in proper positions, and their DIP switches are properly set.

24 No parts on the cabinets are damaged or detached. No cables are damaged orsnapped.

25 No paint is detached. No distortion exists.

11.2 Exploded View of the N68-21-N CabinetThis shows the components of the N68-21-N cabinet and the parts on the cabinet.

Figure 11-1 is the exploded view of the N68-21-N cabinet.



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Figure 11-1 Exploded view of the N68-21-N cabinet

(1) Rack (2) Side doors (3) Front and back doors

Figure 11-1 shows the parts alphabetically sequenced in Table 11-2.



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Table 11-2 Parts of the N68-21-N cabinet

No. Description No. Description

a

(1) Installation hole for the sunkscrew on the side door

b

(1) Installation notch on the sidedoor

c

(1) Combination screw M6 x 12(2) Connecting plate for combiningRNC cabinets

d

(1) Installation hole for the over-cabinet support

e

(1) Installation bolt for PGND cableof RNC cabinet

f

(1) Power cable hole

g

(1) Plastic rodent-proof cover plate

h

(1) Position for product label

i

(1) Latch on the front door

j

(1) Combination screw M6 x 16



11-5

No. Description No. Description

k

(1) Pivot pin on the front door

l

(1) Grounding bolt on the front/back door(2) Floating nut for the side door(3) Pin hole for the front door

11.3 Layout of Power Switches on the RNC CabinetThe power distribution box of the RNC cabinet provides 20 (10 x 2) power outputs. The 6 (3 x2) power outputs of RNC the power distribution box provide power for specific internalcomponents in the RNC cabinet.

The power distribution box of the RNC cabinet provides 6 (3 x 2) power outputs for the subracks.The power supply is divided into two groups: A and B. The switches are A8 to A10 and B8 toB10. Figure 11-2 and Figure 11-3 show the assignment of power switches on the powerdistribution box. Table 11-3 describes the relation between the switches and subracks.

Figure 11-2 Assignment of power switches on the RSR power distribution box



Issue 01 (2008-03-20)

Figure 11-3 Layout of power switches on the RBR power distribution box

Table 11-3 Relation between the switches and subracks

RNC Subracks Power Switches

Subrack 2, subrack 5 A8, B8



11.4 Connections of Power Cables and PGND Cables in theRNC Cabinet

The power cables and PGND cables in the RSR cabinet are connected the same way as those inthe RBR cabinet.

Figure 11-4 shows the connections of the power cables and the PGND cables in the N68-21-Ncabinet.



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Figure 11-4 Connections of power cables and PGND cables in the N68-21-N cabinet

Table 11-4 describes connections of the power cables and PGND cables in the RNC cabinet.

Table 11-4 Connections of power cables and PGND cables in the RNC cabinet (N68-21-N)

Number Description

5, 6; 11, 12 Power cables of the lowest subrack

3, 4; 9, 10 Power cables of the middle subrack

1, 2; 7, 8 Power cables of the highest subrack



Issue 01 (2008-03-20)

Number Description

13 PGND cable connecting the power distribution box andthe busbar

14, 15, 16; 17, 18, 19 PGND cables connecting subracks to busbars

20, 21 PGND cables of the cabinet busbar

24, 25, 26 PGND cables connecting the adjacent cabinets

50 to 57 PGND cables of cabinet doors

Figure 11-5 shows the connections of the power cables and the PGND cables in the N68E-22cabinet.



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Figure 11-5 Connections of power cables and PGND cables in the N68E-22 cabinet

Table 11-5 describes connections of the power cables and PGND cables in the RNC cabinet.

Table 11-5 Connections of power cables and PGND cables in the RNC cabinet (N68E-22)

Number Description

5, 6; 11, 12 Power cable of the lowest subrack

3, 4; 9, 10 Power cable of the middle subrack

1, 2; 7, 8 Power cable of the highest subrack



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Number Description

13 PGND cable connecting the power distribution box andthe mounting bar

14, 15, 16; 17, 18, 19 PGND cables connecting the subracks and the mountingbar

24, 25, 26 PGND cables connecting the adjacent cabinets

50 to 57 PGND cables of cabinet doors



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00407708 n68 21 n cabinet installation guide (v200r010_01)

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