ABB RELION Series - Page 783

Table 724: 2-wire EIA-485 jumper connectors for COM2
Group Jumper connection Description
X13 1-2
2-3
A+ bias enabled
A+ bias disabled
X14 1-2
2-3
B- bias enabled
B- bias disabled
X15 1-2
2-3
Bus termination enabled
Bus termination disabled
Table 725: 4-wire EIA-485 jumper connectors for COM2
Group Jumper connection Description Notes
X13 1-2
2-3
A+ bias enabled
A+ bias disabled
COM2
4-wire TX channel
X14 1-2
2-3
B- bias enabled
B- bias disabled
X15 1-2
2-3
Bus termination
enabled
Bus termination
disabled
X17
1-2
2-3
A+ bias enabled
A+ bias disabled
4-wire RX channel
X18 1-2
2-3
B- bias enabled
B- bias disabled
X19 1-2
2-3
Bus termination
enabled
Bus termination
disabled
Table 726: 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 727: 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
1MRS758755 A Section 13
Protection relay's physical connections
REC615 and RER615 777
Technical Manual