ABB Relion 620 Series - Page 1185

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 633: Jumper connections on communication module COM0023 revision G
COM1 port connection type can be either EIA-232 or EIA-485. Type is selected by
setting jumpers X19, X20, X21 and X26.
The jumpers are set to EIA-232 by default.
Table 1073: 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
Table continues on the next page
1MRS757644 H IED physical connections
620 series
Technical Manual
1185