Siemens Multi Panel MP270 SIMATIC HMI Equipment Manual page 99

Interface Assignment
IF1A
Table B-1
8 1
15 9
IF1B
Table B-2
5 1
9 6
MP270 Equipment Manual
Release 01/99
Pin assignment of the 15-pin Sub-D socket
Pin RS232
1
2 –
3 RxD
4 TxD
5 CTS
6 –
7 –
8
9 –
10 RTS
11 –
12
13 –
14
15
Assignment of the 9-pin Sub-D socket
(configuration via DIL switch, see Page 7-9)
Pin PROFIBUS-DP
MPI
1
2
3 Data B
4 –
5
6
7
8 Data A
9 –
TTY
Housing
RxD–
–
–
–
TxD+
TxD–
Housing
RxD+
–
+20 mA
GND
+20 mA
+5 V/100 mA
GND
RS422 RS485
N. c.
N. c.
TxD (B) Data B
RxD (B)
GND (floating)
+5 V (floating )
N. c.
TxD (A) Data A
RxD (A)
B
–
–
B-1