M12 connectors are also recommended for connecting field devices with MBP technology. But for clear differentiation, these connectors are coded for RS 485 A cable and connectors, not B.
![]() M12 Socket |
![]() M12 Male plug |
M12-5 A - coded according to IEC 60947-5-2 or IEC 61076-2-101 |
Pin no. |
Signal |
Function |
|
1 |
DATA-B |
Data line plus (B conductor) |
Mandatory |
3 |
DATA-A |
Data line minus (A conductor) |
Mandatory |
4 |
Shield |
Ground connection |
Optional |
Thread |
Shield |
Ground conection |
Recommended |
Since the bus terminations are always passive, no additional supply is applied to the device connector.