Siemens SIMATIC MV550 S Operating Instructions Manual page 84

Connection
6.4 Wiring examples
Figure 6-8
Connecting up the Power IO RS232 interface
Figure 6-9
Figure 6-10
84
I/O interface as N type
Connecting up the power IO RS-232 interface as P type
Connecting up the power IO RS-232 interface as N type
Operating Instructions, 05/2019, C79000-G8976-C494-02
SIMATIC MV500