Siemens SIPROTEC 7SS523 V3.2 Manual page 361

Note
The jumpers settings on the connectors X103 and X104 must always be the same, i.e.
either both on 1-2 or both on 2-3.
Table A-13 Jumper settings (service port) for the D-CPU-module
Connector
RS232
X103 1-2
X104 1-2
X105 1-2
X106 1-2
X107 1-2
X108 1-2
X109 1-2
X110 1-2
X111 2-3
X112 2-3
1) 2-3, switches the terminating resistors on if the device is connected to the beginning or
the end of a RS485 bus line.
1-2, switches he terminating resistors off
Table A-14 Jumper settings (binary inputs) for the D-CPU module
Connector Binary-
inputs
X20, X21 BI1
X22, X23 BI2
X24, X25 BI3
X26, X27 BI4
X28, X29 BI5
BI6 to BI12 (on module EAZ, Table A-11, page 343)
1) Delivery setting
Jumper
RS485 optical
1)
any
1)
any
2-3 any
2-3 any
2-3 any
2-3 1-2
2-3 any
2-3 any
2-3 2-3
2-3 1-2
24 V 60 V
1-1 2-2
1-1 2-2
1-1 2-2
1-1 2-2
1-1 2-2
7SS52 V4 Manual
C53000-G1176-C182-1
Settings Central Unit
−
Jumper
110 V 220V
3-3 4-4
3-3 4-4
3-3 4-4
3-3 4-4
3-3 4-4
1)
345