Siemens SIMATIC RF185C Operating Instructions Manual page 42

Connection
5.5 Connecting the communications module
Wiring interfaces/connectors
The following tables show the pin assignment for the interfaces/connectors.
Table 5- 2
Pin
Table 5- 3
Pin
42
Pin assignment PROFINET IO; M12 socket (4-pin, D-coded)
Assignment
1 Data line TxP
2 Data line RxP
3 Data line TxN
4 Data line RxN
Pin assignment power supply; M12 socket (4-pin, L-coded)
Assignment
1 L1: +24 V (brown)
2 N2: 0 V load supply (white)
Relevant for RF18xCI devices
3 N1: 0 V (blue)
4 L2: +24 V (black)
View of M12 socket, 4-pin
View of M12 socket, 4-pin
SIMATIC RF185C, RF186C, RF188C, RF186CI, RF188CI
Operating Instructions, 04/2020, C79000-G8976-C512-03