ABB RELION Series Technical Manual page 781

1MRS758755 A
REC615 and RER615
Technical Manual
GUID-1E542C3A-F6E9-4F94-BEFD-EA3FEEC65FC8 V1 EN
Figure 418: Jumper connections on communication module COM0023 revision
G
COM1 port connection type can be either EIA-232 or EIA-485. The type is selected
by setting jumpers X19, X20, X21 and X26. The jumpers are set to EIA-232 by
default.
Table 720: EIA-232 and EIA-485 jumper connectors for COM1
Group
X19
X20
X21
X26
Protection relay's physical connections
1 2 3
Jumper connection
1-2
2-3
1-2
2-3
1-2
2-3
1-2
2-3
Section 13
X3
X24
Description
EIA-485
EIA-232
EIA-485
EIA-232
EIA-485
EIA-232
EIA-485
EIA-232
775