The M12 D encoding and the T encoding are both used in industrial Ethernet. What are the differences between them?

Core Differences between M12 D-coded & T-coded (Industrial Ethernet Special)

Core Distinction Principle

Key Differences : The essential difference between the two coding types lies in protocol compatibility and integrated transmission capability, both are dedicated connectors for industrial Ethernet applications.

Coding Type Characteristic & Main Application Scenarios

D-coded

The classic version of industrial Ethernet, mainly compatible with mainstream protocols such as PROFINET and EtherNet/IP. The 8-core model supports Gigabit transmission, with the highest market share and the most widely used.

T-coded

The upgraded version with expanded compatibility, supports more niche industrial Ethernet protocols, and can realize mixed transmission of signal and power at the same time without additional wiring, suitable for smart sensors and industrial cameras.

Technical Note: Both D-coded and T-coded adopt 8-core standard design, the power integration function of T-coded greatly optimizes the wiring complexity of smart industrial equipment and improves the integration level of the whole system.

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