2.2.2 M-12 plug connections (part one)

PROFIBUS RS 485 connectors

The 5-pin M-12 connector is another type of connector for PROFIBUS-RS 485 devices where extreme industrial environments exist.
Only shielded connectors are used for PROFIBUS. The connectors feature a mechanical key (B-coding). The following variant of the M-12 connector is used for PROFIBUS-RS 485.

Fig.:5-pin M-12
female socket (PROFIBUS-RS 485)

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Table: 5 pin M-12
for RS 485

Pin 5 may be connected to shielding (not recommended).