2 STR 100 SYSTEM
2.1 DESCRIPTION
STR 100 is modular system of communication devices that can be used for various of tasks
such as:
distance protection criteria transfer
disconnector and circuit breaker statuses transfer between substations
signal transfer via communication through noisy industrial enviroment
status and command transfer for remote switch
2.2 FEATURES
Wide range power supply
Digital input voltage suitable for substation's power supply
RS232, RS485, Fiber Optic or Ethernet communication interface
Switch selected BAUD rate
4 digital inputs
4 dIgital outputs
DIN 35 rail mount
Short response time
2.3 FUNCTION
Two devices from STR 100 system works in pair. Input statuses from one device are transfered
to second device outputs and vice versa.
Devices are coupled through full duplex commnication link. Communication is based on special
protocol. If communication link is broken DO statuses of both devices are returned to theirs inital
states. Speed of communication can be selected by switches.
One of DOs has two functions. It can operate as normal DO or as communication failed
signalization. Selection between functions is made by switch.
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User manual STRMUED1
Picture 1: STR 100 block schematic
