What is the difference between M12 A encoding and other encodings (such as B/D encoding)? Can they be used interchangeably?

Differences Between M12 A-coded & Other Coding Types

Core Distinction Principle

Key Differences: Pin definition, anti-mismatch locking structure and dedicated application field, Mixing different coded connectors is strictly prohibited .

Coding Type & Application Scenarios

A-coded

Optimized for sensor & actuator signal transmission, with anti-misplug structure. The mainstream coding type for conventional signal links in industrial automation.

B-coded

Special pin definition design, mainly used for Profibus field bus system connection, the dedicated coding for industrial bus communication.

D-coded

Customized for industrial Ethernet communication, perfectly adapted to Ethernet/IP, Profinet and other high-speed network transmission systems.

Safety Warning: Mixed use of different coded M12 connectors will cause signal confusion, permanent damage to electrical equipment, and even trigger industrial control system failure with potential safety hazards.

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