1 By Nigel Zeinert IED Communications Over LAN/WAN

2 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

3 Corp LAN INTERNET Serial Server SEL321 LFZP 7SD511 Switch / Firewall CITRIX / VM Ware Server Ethernet REL511 RS232RS485FIBRE ZC22 Fibre Fibre Switch Fibre L90

4 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

5 Serial Devices (IED’s) PROTECTION RELAYS RTU PLC ENERGY METERING EVENT RECORDERS DATA LOGGER SECURITY SYSTEM ANY DEVICE with a SERIAL INTERFACE

6 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

7 Making a Connection Before you start the IED software, set the redirector to the desired IED location Start the application and connect to IED The software thinks its communicating directly with the IED, as if the relay was connected directly to the PC

8 Database IED Type Function Location Application notes IED notes Specific notes for the schemes History of connections User management Security IED Connection Management

9 User Interface The Interface must be: Easy to use Fast Intuitive Contains useful information Help user perform their function User editable

10 Software Open-source standards Reuse existing applications – LINUX – MYSQL – APACHE – PHP – MEDIAWIKI Software Developer

11 IED Details IED’s have special instructions IED’s in different schemes have different special instructions Launch IED application Without any specific arguments With specific arguments Choice of which application Network IED Serial IED

12 Demo Questions?

13 Specifications SINGLE 1 DRIVER SPECIFICATIONS RS232RS423 Mode of Operation -ENDED Total Number of Drivers and Receivers on One Line 1 RECVR10 RECVR Maximum Cable Length50 FT. / m4000 FT. / m Maximum Data Rate20kb/s100kb/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 StatePower OnN/A Max. Driver Current in High Z StatePower +/-2v+/-100uA Slew Rate (Max.)30V/uSAdjustable Receiver Input Voltage Range+/-15V+/-12V Receiver Input Sensitivity+/-3V+/-200mV Receiver Input Resistance (Ohms)3k to 7k4k min.