1 - 8 0 0 - 6 3 3 - 0 4 0 5eFD-58 Universal Field I/OBook 1 (14.2)

PX-MOD $268.00

The PX-MOD Modbus RTU/ASCII SlaveBus Coupler allows connection of up to64 terminals per assembly, 255 terminalstotal, in a Modbus RTU/ASCII serialnetwork. The PX-MOD communicatesusing high-level Modbus commands andsupports 512 bytes of input data and 512bytes of output data.

The PX-MOD includes one RS-485D-sub 9-pin port that functions in halfduplex for connection to a Modbusmaster.

24V 0V

+ +

– –

PX-MOD

1 5

2 6

3 7

4 8

Bus Couplers PX-MODPX-MOD I/O Bus Specifications

Supply Power for I/O Bus 24VDC (-15%/+20%)

Input Current from Power Supply 70mA + (total I/O bus current) / 4

Recommended Fuse 10A Max

I/O Bus Current Supply 1000mA Max

Number of Bus Terminals Supported 64 per assembly, 255 w/ I/O Bus Expansion (based on powerbudget)

Number of Discrete Inputs/Outputs 1020 Inputs and 1020 Outputs with 255 terminalsNumber of Analog Inputs/Outputs 256 inputs and 256 outputs

Maximum Number of Data Bytes* 512 Input Bytes and 512 Output Bytes

012345678

9

012345678

9PX-MOD

1234

5678

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24V 0V

+ +

24V 0V24V 0V24V 0V24V 0V24V 0V24V 0V24V 0V

5678

ModbusStationRotary

Switches

X1

X10

Modbus9-Pin,

D-Sub Port

DIN RailLocking

Wheel

ConfigurationPort

figurationPort

BusCouplerPower In24VDC

TerminalPower In24 VAC/VDC

DIN RailReleaseTab

TerminalPower BusContacts

TerminalPower In0V

I/O Buscontacts

PX-MOD Modbus Port SpecificationsNumber of Stations 99

Station Configuration Rotary Switches

Protocol Modbus RTU/ASCII (default = RTU)

Data Transfer Rates 150, 300, 600, 1200, 2400, 4800, 9600, 19200, 38400 baud

Maximum Cable Length 4000 ft. (1,200m)Connector Type 9-pin, D-Sub, RS-485Recommended Cable 24AWG, Shielded, Twisted Pair

* Total number of terminals cannot exceed 512 input bytes and 512 output bytes.

PX-MOD Terminal Power Bus SpecificationsSupply Power for Terminal Bus 24 VAC/VDC

Maximum Current 10A

Number of Power Contacts 2 (+24 VAC/DC, 0V)

Hot-Swapping Information

Note: This device cannot be Hot Swapped.

IMPORTANT!

General SpecificationsOperating Temperature 32° to 131°F (0° to 55 °C)

Storage Temperature 13° to 185°F (-25° to 85 °C)

Relative Humidity 5% to 95%, non-condensing

Environment Air No corrosive gases permitted

Mounting/Orientation Restrictions 35mm DIN rail/NoneVibration conforms to EN 60068-2-6Shock conforms to EN 60068-2-27Noise Immunity conforms to EN 61000-6-2Protection Class IP20Weight 100gDimensions (WxHxD) 44mm x 100mm x 66.4 mm (1.73 in x 3.94 in x 2.61 in)Agency Approvals* UL File No. E157382, CE

* To obtain the most current agency approval information, see the Agency Approval Checklist section onthe specific part number's web page.

Status LEDs

w w w . a u t o m a t i o n d i r e c t . c o m / f i e l d I O Universal Field I/O eFD-59

CompanyInformation

SystemsOverview

ProgrammableControllers

Field I/O

Software

C-more &other HMI

Drives

SoftStarters

Motors &Gearbox

Steppers/Servos

MotorControls

ProximitySensors

PhotoSensors

LimitSwitches

Encoders

CurrentSensors

PressureSensors

TemperatureSensors

Pushbuttons/Lights

Process

Relays/Timers

Comm.

TerminalBlocks &Wiring

Power

CircuitProtection

Enclosures

Tools

Pneumatics

Safety

Appendix

ProductIndex

Part #Index

Book 1 (14.2)

Bus Couplers PX-MOD

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24V 0V

+ +

24V 0V24V 0V24V 0V24V 0V24V 0V24V 0V24V 0V

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D-sub 9-pin, RS-485 Connector

5 (GND)3 (TxD+/RxD+)(TxD–/RxD–) 8

(5V) 6 Pin 1

Address Selection -Rotary Switches

The Service Port connector is located under the flip-cover shown. This port is used for communica-tion with the software configuration tool. The software configuration tool autoconfigures the Modbusaddresses of the I/O terminals and the interface allows the user to:• Run the configurator • View the configured Modbus addresses • Modify the baud rate

• Change the Modbus offset • Reboot the coupler • Disable or modify Watchdog timer

Requires cable PX-USB-232, with a USB type A connector for the PC and a 4-pin custom microconnector for the Bus Coupler. Works with PX-CFGSW configuration software.

The Modbus node address for the PX-MOD is set using both rotary switches on the front of theCoupler. The address is configured within the 01 to 99 range. The configured value of 00 is reservedfor programming and configuration.

The lower rotary switch is used to set the tens digit (x10) of the node address. The upper rotary switchis used to set the ones digit (x1) of the node address. The switch address is accepted only when poweris cycled. The example shown is configured for a node address of 12.

LED DescriptionsLED Status: ON Status: OFFGreen LED 1: WD Watchdog is active Watchdog error

Green LED 2: RX Data being received No data being received

Green LED 3: TX Data being transmitted No data being transmitted

Red LED 4: ERROR Data Error, communications withthe master device has been lost No data error or checksum error

Green LED 5: Us Bus Coupler power on Bus Coupler power off

Green LED 6: Up Terminal power on Terminal power off

Green LED 7: I/O RUN I/O bus data active Watchdog-timer overflow

Red LED 8: I/O ERR I/O bus error, blinking code No I/O bus error

1234

5678

24V 0V

1234

5678

24V 0V

1122

44

1223344

5666

8884484 88888888888888888888888888888888888888888888888877777777777777777777776667766666666777777777766666666555555555

WD

RX

TX

Error

Us

Up

I/O RUN

I/O ERREEEErrrrrr8

rrroooorrrr III//OO22 V222444VVV 0V22444VVVVV 00VVVVVVV22222244444444VVVVVVV 000000VVVVVVV22222222222222222222222222222222 VV2444VV 0VVVVVVVVVVVVVVVVVVVVVVVVVVVVVV2222222222222222222222222222444444444444444444444444444444444VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV 000000000000000000000000000000000000VVVVVVVVVVVVVVVVVVVVVVVVVVV

Configuration Port

1 - 8 0 0 - 6 3 3 - 0 4 0 5eFD-60 Universal Field I/OBook 1 (14.2)

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0V

+ ++ ++ ++ ++ ++ +

Us GNDs

0V

1

2

3

4

5

6

7

8

PX-901

1111 555555

2222 6666

PXPXP -X-X 901

4444 88888

PXPXP 901

3333 7777

I/O-BusPowerDistributionTerminal

Bus EndTerminal

Bus CouplerPX-MOD

Terminal Power Bus Power Bus Isolation

It is important to staywithin thefollowing three specifications:.

1. Do not exceed the total number of 64Terminals allowed per Assembly.

2. Do not exceed the total number of 512Input Bytes and 512Output Bytes.

3. Do not exceed the Coupler I/O BusPower Budget of 1000mAas there isno internal current protection.

Bus Couplers PX-MOD

PX-MOD Example Network Diagram

System ConsiderationsThe PX-MOD performs as a ModbusRTU/ASCII slave in a Modbus network.Communication to the master is via a9-pin D-sub RS-485 port. The maximumdistance from the master to the PX-MOD is4000 feet (1200 meters) using 24 AWGshielded, twisted pair. Termination resistorsare required at the beginning and end ofthe network. It is highly recommended thata dedicated network be used for the ProtosX system.

The PX-MOD Bus Coupler supports up to64 terminals per assembly, 255 with BusExpansion Couplers. A minimal assemblyconsists of a PX-MOD Bus Coupler, I/OTerminals and a Bus End Terminal.

An I/O Bus, powered through the BusCoupler, provides data communicationacross the terminal assembly via sixcontacts located on the side walls of theterminals. A Terminal Power Bus providespower for the I/O terminals via two powercontacts. A power source of 24VAC or24VDC must be connected to the BusCoupler from an external supply.

If additional 24VDC supply is required forterminal wiring, eight points of 24VDCpower can be distributed from theTerminal Power Bus using a PowerDistribution Terminal (PX-949). Thisterminal must be mounted to the right of aterminal that passes 24VDC on the powerbus. Both I/O Bus communication andterminal bus power are passed through toadjoining terminals.

For expansion beyond a 64-terminalassembly, a Bus Expansion End Terminal(PX-902) is used in place of a standardBus End Terminal (PX-901). A BusExpansion Coupler Terminal (PX-903) isused at each expansion assembly in placeof a PX-MOD Bus Coupler. Up to 31Expansion couplers can be used in agroup of assemblies. Connection is madebetween the Expansion Coupler Terminalsvia standard RJ45 Ethernet patch cable.

PC with PX-CFGSW

PX-USB-232

PX-MOD

PX-MOD

PX-MOD

P3000 CPU orother Modbus

Master

PX-902 PX-903

PX-903

PX-903

PX-901

PX-901

PX-901

PX-901

PX-901

Cat5e STP cable16.5 ft. (5m) max. length per

segment

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100

mm

94m

m

47 mm

w w w . a u t o m a t i o n d i r e c t . c o m / f i e l d I O Universal Field I/O eFD-61

CompanyInformation

SystemsOverview

ProgrammableControllers

Field I/O

Software

C-more & other HMI

Drives

SoftStarters

Motors &Gearbox

Steppers/Servos

Motor Controls

ProximitySensors

Photo Sensors

Limit Switches

Encoders

CurrentSensors

PressureSensors

TemperatureSensors

Pushbuttons/Lights

Process

Relays/Timers

Comm.

TerminalBlocks & Wiring

Power

CircuitProtection

Enclosures

Tools

Pneumatics

Safety

Appendix

ProductIndex

Part #Index

Book 1 (14.2)

Bus Couplers PX-MODPX-MOD Wiring Connections

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Label Terminals

24VDCPower

–+

24VACPower

+ +

– –

Us GNDs

24VDC Power

LabelBus Coupler

Supply Power0V24V

–+

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Label TerminalSupply Power

24VDCPower

OR

–+

24VACPower

+ +

– –

Us GNDs

24VDC Power

LabelBus Coupler

Supply Power0V24V

–+

1 - 8 0 0 - 6 3 3 - 0 4 0 5eFD-70 Universal Field I/OBook 1 (14.2)

Power Budget Planning

A Column 1 Column 2 Column 3

Terminal Terminal Type I/O Bus (from Coupler)

B CURRENT SUPPLIED

PX-MOD Bus Coupler 1000mA

C CURRENT REQUIRED

PX-144PX-172-1PX-322-1PX-312PX-244-1PX-412

4pt. DC Discrete Input2pt. AC Discrete Input2ch. RTD Input2ch. DC Analog Input4pt. DC Discrete Output2ch. DC Analog Output

5mA3mA60mA65mA9mA75mA

D Maximum Current Required 217mA

E Remaining Current Available 783mA

Managing PowerResourcesWhen determining the types and quantityof terminals you will be using, it is impor-tant to remember there is a definedamount of I/O Bus Current supplied fromthe Bus Coupler. There are also definedlimits for each external source.

The chart on the next page indicates thepower supplied and used by each Protos Xcomponent. The chart below shows anexample of how to calculate the powerused by your particular system. Thesecharts should make it easy for you todetermine if the devices you have chosenwill operate within the power budget ofyour system configuration.

If the I/O terminals you have chosenexceed the maximum power availablefrom the Bus Coupler, you may be able toresolve the problem by using expansionterminals.

Power Budget ExampleThe example on the right shows how tocalculate the power budget for a typicalProtos X system. This example isconstructed using a PX-MOD Bus Couplerand six I/O Terminals. It is recommendedyou construct a similar table for yoursystem. Follow the steps below to determine your power budget.

1. Using a chart similar to this one, fill incolumns 1 and 2.

2. Using the tables on the next pageenter the current supplied and currentused by each device (column 3).

3. Add together the current used by thesystem (row C) for column 3 and putthe total in the row labeled “MaximumCurrent Required” (row D).

4. Subtract the calculated “MaximumCurrent Required” (row D), from the“Current Supplied” and place thedifference in the row labeled“Remaining Current Available” (row E).

5. If “Maximum Current Required” isgreater than “Current Supplied” incolumn 3, the power budget will beexceeded. It will be unsafe to use thisconfiguration, and you will need torestructure your I/O configuration.

w w w . a u t o m a t i o n d i r e c t . c o m / f i e l d I O Universal Field I/O eFD-71

CompanyInformation

SystemsOverview

ProgrammableControllers

Field I/O

Software

C-more & other HMI

Drives

SoftStarters

Motors &Gearbox

Steppers/Servos

Motor Controls

ProximitySensors

Photo Sensors

Limit Switches

Encoders

CurrentSensors

PressureSensors

TemperatureSensors

Pushbuttons/Lights

Process

Relays/Timers

Comm.

TerminalBlocks & Wiring

Power

CircuitProtection

Enclosures

Tools

Pneumatics

Safety

Appendix

ProductIndex

Part #Index

Book 1 (14.2)

Power Supplied andConsumedThese tables show the amount of powersupplied by each of the Bus Couplers andthe amount of power consumed by eachI/O device. The Power Consumed chartlists how much power is drawn from theI/O Bus, Terminal Power Bus (externallysupplied) and from the Load (when usingoutput terminals). Use this informationwhen calculating the power budget foryour system.

Power RequirementsPower Supplied

Device 5V(mA) I/O Bus Supply

CouplerPX-MOD 1000 MaxPX-TCP1 1000 MaxPX-TCP2 1750 Max

Bus Expansion CouplerPX-903 400 Max

Power Consumed

Device 5V(mA) from I/O Bus (mA) from TerminalPower Bus (mA) from Load

Discrete Input TerminalsPX-144 5 5

N/APX-148 5 2 (plus load)PX-149 20 N/APX-172-1 3 6PX-172-2 3 6

Discrete Output TerminalsPX-244-1 9

N/A

30PX-244-2 9 30PX-248 18 60 (plus load)PX-249 45 35 (plus load)

Analog Input TerminalsPX-302 60 N/A

N/A

PX-304 85 LoadPX-308 105 LoadPX-312 65 N/APX-314 100 N/APX-318 140 N/A

RTD/Thermocouple Input TerminalsPX-322-1 60

N/A N/A

PX-324-1 60PX-332-J 65PX-334-J 75PX-332-K 65PX-334-K 75

Analog Output TerminalsPX-402 60

N/A

50 (plus load)PX-404 20 60 (plus load)PX-408 25 50 (plus load)PX-412 75 50 (plus load)PX-414 75 50 (plus load)PX-418 20 20

Relay Output Terminals

PX-272-1 10 ON resistance max 100m� (plusload) N/A

PX-272-2 80

Combination In/Out Terminals

PX-549 25 (additional 3mA forinputs) 15 (plus load) N/A

1 - 8 0 0 - 6 3 3 - 0 4 0 5eFD-72 Universal Field I/OBook 1 (14.2)

System Installation and Removal

Removing Bus Couplerand Bus TerminalsA locking mechanism prevents individual unitsfrom being pulled off. For bus terminal removal,pull the orange DIN rail release tab firmly tounlatch the unit from the rail. If attached toother terminal units, slide unit forward untilreleased. For Bus Couplers with locking wheels,release the DIN rail locking wheel, then pullfirmly on DIN rail release tab.

Bus Coupler and BusTerminal InstallationBus Coupler Installation:1. Attach a Bus Coupler by snapping it onto

35mm DIN rail and securing it into positionusing the DIN rail locking wheel (whereapplicable) located on the left side of thecoupler.

Bus Terminal Installation:2. To add a bus terminal, insert unit onto right

side of Bus Coupler using the tongue andgroove at the top and bottom of the unit,pressing gently until it snaps onto the DINrail.

A proper connection cannot be made by slidingthe units together on the DIN rail. When correctly installed, no significant gap can beseen between the attached units. Bus connection is made through the six slide contacts located on the upper right side of theunits. Add up to 64 bus terminals per Bus Coupler, including a bus end terminal.

Insert unit using tongue and groove molded guide and press gently until it becomes firmly seated on DIN rail.

Align tab with molded guide

ntil raaiill.

Where applicable, rotate Locking Wheel to lock Bus Coupler

2

1

Wiring Specifications

Connection Type Spring Clamp Terminals

Wire Gauge/Wire CrossSection* 28-14 AWG / 0.08 - 2.5 mm2

Screwdriver Width 2.5 mm (0.10) such as ourTW-SD-MSL-2

Wire Stripping Length 8mm

Wiring ConnectionsWire connection is made through a springclamp style terminal. This terminal is designedfor a single-conductor solid or stranded wire.Wire connection is made by firmly pushing thescrewdriver into the screwdriver slot, insertingthe wire into the wire slot and removing thescrewdriver, locking the wire into position.

Firmly pull DIN Rail Release Tabto unlatch unit from rail.

Where applicable, rotate Locking Wheel to unlock Bus Coupler

* For Thermocouple terminals, a thermocouple extension wire is recommendedWire Slot

ScrewdriverSlotScSl

w w w . a u t o m a t i o n d i r e c t . c o m / f i e l d I O Universal Field I/O eFD-73

CompanyInformation

SystemsOverview

ProgrammableControllers

Field I/O

Software

C-more & other HMI

Drives

SoftStarters

Motors &Gearbox

Steppers/Servos

Motor Controls

ProximitySensors

Photo Sensors

Limit Switches

Encoders

CurrentSensors

PressureSensors

TemperatureSensors

Pushbuttons/Lights

Process

Relays/Timers

Comm.

TerminalBlocks & Wiring

Power

CircuitProtection

Enclosures

Tools

Pneumatics

Safety

Appendix

ProductIndex

Part #Index

Book 1 (14.2)

PX-TCP2 PX-903 PX-902StandardTerminal

PX-TCP1 / PX-MOD

100 mm[3.94”]

68.8 mm[2.71”]

100 mm[3.94”]

51 mm[2.01”]

PX-TCP2

mm4”]

51 mm

EthernetTCP/IP

COM

ERROR

WDG

I/O RUN

I/O ERR

PX-TCP2TM

ON 1 2

3 4

5 6

7 8

9 10

m]

m

PX-TCP2TM

24V 0V

+ +

PEPE

EthernetTCP/IPTCP/IPTCP/IP

COM

I/O I/O ERR+I/O I/O RUN +

ERROR 24VWDG

44 mm[1.73”]

0V

+

PE

0V24V

44 m

PX-TCP1

TM

mm3”]

mm

1234

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.PE

PXPX-MODPX-MODPXPXPX-MOD-MODPXPXPX-MPX-MPX-MODPX-MOD

1234

24V 0V

+ +

PEPE

ONDIP

1 2 3 4 5 6 7 8

ON1 2

24.5 mm[.96”]

mm

PX-TCP1CP1PX-TCP1

TM

Up

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.PE

Us GNDsUs GNDsUs GNDsGNDs

1234

24V 0V

+ +

PEPE

[.96”]24.5 mm

[.96”]24.5 mm

1

2

3

4

5

6

7

84 8

+

PE

3 7

2 662

PX-903

PX-903

1 51 51 51 5

27.5 mm[.96”][.96”][.96”]

PX-902

27.5 mm

PPPXXXPXPPPXP -X-X 902902902902902902

12 mm[.47”]

1

2

3

4

5

6

7

8

33

4

6

77

8

1.4”35mm

min

1.4”35mm

min

1.4”35mm

min

1.4”35mm

min

0.8”20mm

min

0.8”20mm

min

Installation ConsiderationsTerminal Dimensions andSpacing RequirementsUse the following diagrams to make surethe Protos X system can be installed in your application. Protos X terminals require35mm DIN rail for mounting; there are noorientation restrictions.

To ensure proper airflow for coolingpurposes, units should be spaced, at aminimum, as shown. It is also important tocheck the Protos X dimensions against theconditions required for your application.

See the Enclosures sectionfor an enclosure that may besuitable for your application