ABB Relion 620 Series - Page 1188

Group Jumper connection Description Notes
X16
1-2
2-3
Bus termination ena-
bled
Bus termination disa-
bled
4-wire RX channel
X17
1-2
2-3
A+ bias enabled
A+ bias disabled
X18
1-2
2-3
B- bias enabled
B- bias disabled
Table 1079: X12 Optical ST connection
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 1080: EIA-232 connections for COM0023 (X6)
Pin EIA-232
1 DCD
2 RxD
3 TxD
4 DTR
5 AGND
6 -
7 RTS
8 CTS
Table 1081: EIA-485 connections for COM0023 (X6)
Pin 2-wire mode 4-wire mode
1 - Rx/+
6 - Rx/-
7 B/- Tx/-
8 A/+ Tx/+
Table 1082: EIA-485 connections for COM0023 (X5)
Pin 2-wire mode 4-wire mode
9 - Rx/+
8 - Rx/-
7 A/+ Tx/+
Table continues on the next page
IED physical connections 1MRS757644 H
1188 620 series
Technical Manual