Siemens simatic hmi op27

B-2
OP27, OP37 Equipment Manual
Release 05/99
Pin assignment of the 9–pin Sub-D socket
(Configuration via DIL switch, see Chapter 13.1.2):
Pin General PROFIBUS-DP
MPI
RS422 RS485
1
2
3 Data B TxD (B) Data B
4 RxD (B)
5 GND (floating )
6 +5 V (floating )
7
8 Housing Data A TxD (A) Data A
9 RxD (A)
Pin assignment of the 15–pin Sub–D socket:
Pin General TTY RS42 RS485
1 Housing
2 RxD–
3 RxD (B)
4 TxD (B) Data B
5 RxD (A)
6 TxD+
7 TxD–
8 Housing
9 RxD+
10 TxD (A) Data A
1 1 +24 V
12 GND (5 V)
13
14 +5 V
15 GND (24 V)
IF1B
IF3 (TP37)
only
Interface Assi
g
nments
51
96
81
15 9
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