ABB Relion 620 Series - Page 1189

Pin 2-wire mode 4-wire mode
6 B/- Tx/-
5 AGND (isolated ground)
4 IRIG-B +
3 IRIG-B -
2 -
1 GND (case)
13.4.7.3 COM0032-COM0034 jumper locations and connections
The optional communication modules include support for optical ST serial
communication (X9 connector). The fiber optic ST connection uses the COM1 port.
X15 X24
3
2
1
3
2
1
Figure 634: Jumper connections on communication module COM0032
1MRS757644 H
IED physical connections
620 series
Technical Manual
1189