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Differences & Compatibility of M12 A/B/D-coded Connectors

Core Difference & Compatibility Principle

  • Key Distinction: Pin definition and locking position structure. A/B/D coded connectors are NOT compatible with each other . Selection must match the coding type of equipment interface strictly.

Coding Type & Main Application Scenarios

A-coded

Mainly for sensor & actuator signal transmission, the most widely used coding type in industrial automation field with universal applicability.

B-coded

Specialized for PROFIBUS field bus system connection, the dedicated matching coding for industrial bus communication equipment.

D-coded

Custom designed for industrial Ethernet transmission, perfectly adapted to high-speed network communication protocols and equipment.

Technical Note: The anti-mismatch lock design of different coded connectors is to avoid signal confusion and equipment damage caused by wrong insertion, please confirm the equipment interface coding before selection.