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IEC/TS 63444 Ed. 2.0 en:2026

Industrial networks - Ethernet-APL port profile / Ethernet-SPE profile specification
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IEC/TS 63444 Ed. 2.0 en:2026

Industrial networks - Ethernet-APL port profile / Ethernet-SPE profile specification

PUBLISH DATE 2026
IEC/TS 63444 Ed. 2.0 en:2026

IEC TS 63444:2026 is applicable to process automation equipment using a 10BASE-T1L compliant Physical Layer (PHY). Ethernet-APL intrinsically safe profiles with different predefined entity or limitation parameters (for example voltage, current, power, capacitance, inductance, cable length) simplify the examination of the interconnection of different Ethernet-APL ports.

Furthermore, this document is also applicable to factory and building automation and control equipment using a 10BASE-T1L compliant, and Power over Data Lines (PoDL) compliant Physical Layer (PHY) for non-intrinsically safe Ethernet installations.

NOTE: In this document the term Ethernet-SPE is used for PoDL compliant PHY.

The following technical features are part of this document:

  • topology with trunk and spur installation capability;
  • 2-wire technology (full-duplex communication data rate of 10 Mbit/s);
  • long distance (refers to cable lengths of several hundred meters, with spans up to 1 000 m);
  • intrinsic safety (installation of Ethernet-capable field devices in hazardous areas);
  • power supply to field devices over the same 2-wire cable used for data communication;
  • non-intrinsically safe Ethernet installation in factory and building automation.

This second edition cancels and replaces the first edition published in 2023. This edition constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous edition:

  • a) new power class for Ethernet-APL;
  • b) addition of Ethernet-SPE;
  • c) clarification of usability of Ethernet-APL in non-hazardous locations.
SDO IEC: International Electrotechnical Commission
Document Number IEC/TS 63444
Publication Date June 1, 2026
Language en - English
Page Count 64
Revision Level 2.0
Supercedes
Committee 65C
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