ABB RER615 - Page 848

Table 746: Optical ST connection (X12)
Group Jumper connection Description
X3 1-2
2-3
Star topology
Loop topology
X24 1-2
2-3
Idle state = Light on
Idle state = Light off
Table 747: EIA-232 connections for COM0022 and COM0023 (X6)
Pin EIA-232
1 DCD
2 RxD
3 TxD
4 DTR
5 AGND
6 -
7 RTS
8 CTS
Table 748: 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 749: EIA-485 connections for COM0023 (X5)
Pin
2-wire mode 4-wire mode
9 - Rx/+
8 - Rx/-
7 A/+ Tx/+
6 B/- Tx/-
Table continues on the next page
Protection relay's physical connections 1MRS758755 C
848 REC615 & RER615
Technical Manual