Data Communication For Digital Differential Protection Relays With Fo-Interface - Siemens 7XV5652-0xA00 Series Operating Instructions Manual

6.2 Data communication for Digital Differential Protection
Relays with FO-Interface
Two differential relays with an 820 nm FO-interface can be connected
together via a communication system. The communication devices
provide no optical input interfaces but have for example RS232-
interfaces. With 7XV5652 the optical signals can be converted to the
electrical RS232 signals direct at the multiplexer.
L2 40 2,1 A Ma x4 50.1A
L3 40 2,1 A Ma x4 50.1A
LWL
Converter
7XV5652
RS232
Bild 7: Data communication for digital Differential Protection Relays
with FO-Interface
Note:
Communication via comms-systems or modem delays the datas. The
relay can compensate a maximum delay of 30 ms.
Page 26 of 28
7SD511
Digital Network
RS232-FO Converter
L2 40 2,1 A Ma x4 50.1A
L3 40 2,1 A Ma x4 50.1A
7SD511
LWL
Converter
7XV5652
RS232
12.10.2006