ABB Relion REC615 - Page 845

1 2 3
1 2 3
X24
X3
X5
1 2 3
1 2 3
X6 X21
X7
X20
X9
X19
X11
X8
X16
X18
X27
X13
X26
3 2 1
X14
X15
X28
X17
3 2 1
Figure 456: 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 740: EIA-232 and EIA-485 jumper connectors for COM1
Group
Jumper connection Description
X19 1-2
2-3
EIA-485
EIA-232
X20 1-2
2-3
EIA-485
EIA-232
X21 1-2
2-3
EIA-485
EIA-232
X26 1-2 EIA-485
1MRS758755 C Protection relay's physical connections
REC615 & RER615
Technical Manual
845