Pin 2-wire mode 4-wire mode
4 IRIG-B +
3 IRIG-B -
2 GNDC (case via capasitor)
1 GND (case)
13.4.8.4 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.
GUID-CA481BBF-C1C9-451D-BC18-19EC49B8A3A3 V2 EN
Figure 590: Jumper connections on communication module COM0032
1MAC059074-MB A Section 13
Protection relay's physical connections
615 series ANSI 1163
Technical Manual