ABB RELION Series - COM0032 Jumper Locations and Connections

Table 728: EIA-485 connections for COM0022 and COM0023 (X6)
Pin 2-wire mode 4-wire mode
1 - Rx/+
6 - Rx/-
7 B/- Tx/-
8 A/+ Tx/+
Table 729: EIA-485 connections for COM0023 (X5)
Pin 2-wire mode 4-wire mode
9 - Rx/+
8 - Rx/-
7 A/+ Tx/+
6 B/- Tx/-
5 AGND (isolated ground)
4 IRIG-B +
3 IRIG-B -
2 -
1 GND (case)
13.4.7.2 COM0032 jumper locations and connections
The optional communication modules include support for optical ST serial
communication (X9 connector). The fibre-optic ST connection uses the COM1 port.
Section 13 1MRS758755 A
Protection relay's physical connections
778 REC615 and RER615
Technical Manual