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Connecting
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
40
Pin assignment reader interface; M12 socket (8-pin, A-coded)
Assignment
RS422
1
+24 V
2
-RxD
3
0 V
4
+RxD
5
+TxD
6
-TxD
7
--
8
Functional ground
/ shielding
Pin assignment Ethernet; M12 socket (4-pin, D-coded)
Assignment
1
Data line TxP
2
Data line RxP
3
Data line TxN
4
Data line RxN
RS232
+24 V
--
0 V
RxD
+5 V
--
TxD
Functional ground
/ shielding
Operating Instructions, 03/2022, C79000-G8976-C578-02
View of M12 socket, 8-pin
View of M12 socket, 4-pin
SIMATIC RF166C
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