ABB RELION Series Technical Manual page 783

1MRS758755 A
REC615 and RER615
Technical Manual
Table 724: 2-wire EIA-485 jumper connectors for COM2
Group
X13
X14
X15
Table 725: 4-wire EIA-485 jumper connectors for COM2
Group Jumper connection
X13 1-2
2-3
X14 1-2
2-3
X15 1-2
2-3
X17 1-2
2-3
X18 1-2
2-3
X19 1-2
2-3
Table 726: Optical ST connection (X12)
Group
X3
X24
Table 727: EIA-232 connections for COM0022 and COM0023 (X6)
Pin
1
2
3
4
5
6
7
8
Protection relay's physical connections
Jumper connection
1-2
2-3
1-2
2-3
1-2
2-3
Description
A+ bias enabled
A+ bias disabled
B- bias enabled
B- bias disabled
Bus termination
enabled
Bus termination
disabled
A+ bias enabled
A+ bias disabled
B- bias enabled
B- bias disabled
Bus termination
enabled
Bus termination
disabled
Jumper connection
1-2
2-3
1-2
2-3
EIA-232
DCD
RxD
TxD
DTR
AGND
-
RTS
CTS
Section 13
Description
A+ bias enabled
A+ bias disabled
B- bias enabled
B- bias disabled
Bus termination enabled
Bus termination disabled
Notes
COM2
4-wire TX channel
4-wire RX channel
Description
Star topology
Loop topology
Idle state = Light on
Idle state = Light off
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