Siemens SIMATIC S5-115F - Page 219

S5-115F Manual Communications Capabilities
Pin Assignments of the 25-way subminiature D connector
Figure 7-16. Pin Assignments of the 25-Way Subminiature D Connector
25
24
14
22
23
21
20
19
18
17
16
15
2
3
4
5
6
7
1-
Ground
-
-
V.24 -RXD
TTY IN+
DSR
TTY IN -
-
DTR
-
-
-
20 mA receive
-
8
9
10
11
12
13
CTS
TTY OUT+
V.24 -TXD
TTY OUT -
RTS
Ground
20 mA send
Ground
Shield
Shield
Note
If you are using the CP 523 with an active TTY interface, please note the voltage drop
over the cable lengths as well as the Send and Receive elements of the module.
EWA 4NEB 811 6148-02 7-43