Siemens simatic hmi op27 Equipment Manual page 197

Interface Assignments
IF1B
Pin assignment of the 9–pin Sub-D socket
(Configuration via DIL switch, see Chapter 13.1.2):
5 1
9 6
IF3 (TP37)
Pin assignment of the 15–pin Sub–D socket:
only
8 1
15 9
B-2
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Pin General PROFIBUS-DP
1
2
3
4
5 GND (floating )
6 +5 V (floating )
7
8 Housing
9
Pin General
1 Housing
2
3
4
5
6
7
8 Housing
9
10
11 +24 V
12 GND (5 V)
13
14 +5 V
15 GND (24 V)
RS422
MPI
Data B TxD (B)
RxD (B)
Data A TxD (A)
RxD (A)
TTY RS42
RxD–
RxD (B)
TxD (B)
RxD (A)
TxD+
TxD–
RxD+
TxD (A)
OP27, OP37 Equipment Manual
RS485
Data B
Data A
RS485
Data B
Data A
Release 05/99