M12 connectors are today recommended for almost all fieldbus sizes and comply with IP67 protection class according to IEC 61076-2-101/104, and are traditionally used to connect sensors and actuators in automation technology. The corrections in this standard describe D-coded 4-pin connectors for Industrial Ethernet applications as having a higher level of protection.

According to the EIA/TIA standard, the M12 connector corresponds to the transmission technical conditions of the Category 5 modular jack (RJ45). Using D-coding prevents incorrect engagement with A-coding (for sensor and actuator wiring) and B-coding (for some fieldbuses).

The M12 connector was not available for printed circuit boards until 2005, when the circular M12 connector with surface mount termination was born. Surface mount termination facilitates miniaturization of field devices. The sturdy pins allow it to pass through bulk packaging and the corresponding feeding process using a vibrating bowl.

Connecting thread M12X1, there are two kinds of straight and 90-degree curved. 3-pin 3-hole, 4-pin 4-hole, 5-pin 5-hole, 8-pin 8-hole, 12-pin 12-hole waterproof connector, optional cable length, cable color black, gray, yellow, orange, etc., connector color : Black, gray, yellow, orange, etc. Unshielded or shielded cables are optional.

M12 connectors are mainly used in outdoor light boxes, construction machinery, steel production equipment, power equipment, mining machinery, ship machinery, automotive equipment, automatic production equipment, temperature transmitters, hydraulic machine tools, sensors, solenoid valves, instrumentation, pressure change transmitter, etc.