1 by nigel zeinert ied communications over lan/wan
TRANSCRIPT
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Serial Tunnel
The Principles:•Reroute your COM port over a network•Communicate with the serial device as if it was connected locally•The COM port data is encapsulated in the network protocol•Protocol ensures transparent data communication
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Corp LANCorp LAN
INTERNETINTERNET
Serial ServerSerial Server
SEL321SEL321 LFZPLFZP
7SD5117SD511
Switch / FirewallSwitch / Firewall
CITRIX / CITRIX / VM Ware VM Ware
ServerServerEthernetEthernet
REL511REL511
RS232RS232
RS485RS485
FIBREFIBRE
ZC22ZC22
FibreFibre
Fibre SwitchFibre Switch
FibreFibre
L90L90
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Redirecting Software
•The COM port is redirected via a software driver•All windows based software can be redirected without the application knowing•Most DOS applications can be redirected •DOS redirection software is available that should redirect all DOS app’s (not tested)•Redirection is transparent to the application•Host = The Serial Server Location•TCPPort =
–Port type = 30xx serial port–Port number = xx18
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Serial Devices (IED’s)
•PROTECTION RELAYS•RTU•PLC•ENERGY METERING•EVENT RECORDERS•DATA LOGGER•SECURITY SYSTEM•ANY DEVICE with a SERIAL INTERFACE
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TYPES of SERIAL PORTS
•RS232•RS423•RS422•RS485•Fibre•Copper
•The Serial Server allows concurrent communication to all ports•Ports can be configured
–Printer port–Terminal Server–Serial port–Modem port
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Making a Connection
Before you start the IED software, set the redirector to the desired IED locationStart the application and connect to IEDThe software thinks its communicating directly with the IED, as if the relay was connected directly to the PC
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DatabaseIED
•Type•Function•Location
Application notes
IED notes
Specific notes for the schemes
History of connections
User management
Security
IED Connection Management
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User Interface
The Interface must be:•Easy to use•Fast•Intuitive•Contains useful information•Help user perform their function•User editable
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Software
•Open-source standards•Reuse existing applications
–LINUX–MYSQL–APACHE–PHP–MEDIAWIKI
•Software Developerwww.iedcomms.hsd.com.au
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IED Details
IED’s have special instructionsIED’s in different schemes have different special instructionsLaunch IED application
Without any specific arguments
With specific arguments
Choice of which applicationNetwork IEDSerial IED
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Specifications
SINGLE SINGLE
1 DRIVER 1 DRIVER
SPECIFICATIONS RS232 RS423
Mode of Operation-ENDED -ENDED
Total Number of Drivers and Receivers on One Line1 RECVR 10 RECVR
Maximum Cable Length 50 FT. / 15.24 m 4000 FT. / 1219.2 m
Maximum Data Rate 20kb/s 100kb/s
Maximum Driver Output Voltage +/-25V +/-6V
Driver Output Signal Level (Loaded Min.) Loaded +/-5V to +/-15V +/-3.6V
Driver Output Signal Level (Unloaded Max) Unloaded +/-25V +/-6V
Driver Load Impedance (Ohms) 3k to 7k >=450
Max. Driver Current in High Z State Power On N/A N/A
Max. Driver Current in High Z State Power Off +/-6mA @ +/-2v +/-100uA
Slew Rate (Max.) 30V/uS Adjustable
Receiver Input Voltage Range +/-15V +/-12V
Receiver Input Sensitivity +/-3V +/-200mV
Receiver Input Resistance (Ohms) 3k to 7k 4k min.