ABB RELION 620 Series Technical Manual page 906

Section 14
Protection relay's physical connections
900
Table 626: Configuration options of the two independent communication ports
COM1 connector X6
EIA-232
EIA-485 2-wire
EIA-485 4-wire
GUID-D4044F6B-2DA8-4C14-A491-4772BA108292 V1 EN
Figure 464: Jumper connections on communication module COM0023
COM1 port connection type can be either EIA-232 or EIA-485. Type is selected by setting
jumpers X19, X20, X21, X26.
The jumpers are set to EIA-232 by default.
COM2 connector X5 or X12
Optical ST (X12)
EIA-485 2-wire (X5)
EIA-485 4-wire (X5)
1 2 3
X 13
X 15
X 14
1 2 3
X 3
X 25
X 24
1MAC504801-IB E
620 series ANSI
Technical Manual