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M12 D-coded Connector Introduction and Appliaction

Author : Arbyter Qing

Update time : 2025-09-08 14:42:58

An M12 D-coded connector is a circular connector in the M12 family that is specifically designed for Industrial Ethernet applications. The “D-coding” refers to the keyway and pin layout that ensures correct mating and prevents mismatching with other M12 coding types (like A, B, X, etc.).

Key Features of M12 D-Coded Connectors:

1. Pin Count:

Typically 4 pins (for Ethernet: 2 pairs for data transmission).

Sometimes 5 pins (with an additional functional ground).

2. Data Transmission:

Supports Fast Ethernet (up to 100 Mbit/s).

Optimized for twisted-pair Ethernet wiring (Cat 5e equivalent).

3. Keying & Safety:

The D-shaped key prevents mismating with A-coded (sensor) or B-coded (fieldbus) connectors.

Ensures the connector is only used for Ethernet/data applications.

4. Environmental Protection:

Usually rated IP67/IP68, making them dust-tight and waterproof.

Rugged, vibration-proof, and suitable for harsh industrial environments.

Applications of M12 D-Coded Connectors:

Industrial Ethernet Networks (EtherNet/IP, PROFINET, EtherCAT).

Factory Automation: connecting PLCs, controllers, and Ethernet switches.

Robotics and Machinery: for reliable Ethernet communication in moving equipment.

Vision Systems: linking industrial cameras and Ethernet-enabled sensors.

Transportation & Logistics: Ethernet networking in trains, AGVs, or conveyor systems.

In short: An M12 D-coded connector is the standard for 100 Mbit/s or 1000Mbit/s Industrial Ethernet, providing a rugged and waterproof solution for data communication in automation and industrial networking.

FLECONN can produce IP67/IP68 waterproof m12 d-coded connector cable, m12 d-code 4 pole male to female cable, m12 4 pin d-coded male to rj45 ethernet cable, m12 4 pin d-coded female to rj45 ethernet cable, m12 4 pin d-coded male/female to x-coded male/female Ethernet cable.

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Arbyter Qing

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M12 D-coded Connector Introduction and Appliaction