IEC TS 63444:2026

Overview

IEC TS 63444:2026 is a technical specification from the International Electrotechnical Commission (IEC) focusing on the profiles for Ethernet-APL (Advanced Physical Layer) and Ethernet-SPE (Single Pair Ethernet) port configurations in industrial networks. This standard plays a vital role in specifying how 10BASE-T1L compliant Physical Layers (PHYs) are used to enable efficient and safe Ethernet connectivity in process automation, factory automation, and building automation environments.

The standard addresses both intrinsically safe and non-intrinsically safe Ethernet installations, covering a broad spectrum of industrial and commercial use cases. It highlights features such as 2-wire technology, long-distance communications, trunk and spur topologies, and power delivery over data lines (PoDL). The second edition introduces key revisions, including a new power class for Ethernet-APL, expanded support for Ethernet-SPE, and updated guidance for non-hazardous installations.

Key Topics

• Topology and Installation: Supports trunk and spur installations, enhancing flexible network layouts ideal for both process plants and building infrastructures.
• 2-Wire Technology: Enables full-duplex communication at 10 Mbit/s over a single twisted pair, streamlining cabling and installation.
• Long-Distance Communication: Designed for reliable ethernet transmission over cable lengths reaching up to 1,000 meters.
• Intrinsic Safety: Facilitates the safe deployment of Ethernet-enabled field devices in hazardous industrial zones using predefined safety parameters (e.g., voltage, current, cable length, capacitance, inductance).
• Power over Data Lines (PoDL): Integrates data and power delivery through the same 2-wire connection, reducing infrastructure complexity.
• Factory and Building Automation: Addresses not only process automation but also applications in non-hazardous manufacturing and commercial environments with PoDL-compliant PHY.
• Port Profile Classification: Clarifies interoperability at the port level with detailed port, power, and protection classes for seamless connection of devices.

Applications

IEC TS 63444:2026 is highly applicable for organizations that design, integrate, or maintain modern industrial networks, especially in:

• Process Automation: Supports safe and efficient deployment of smart field devices in potentially explosive atmospheres, ensuring compliance with global intrinsic safety requirements.
• Factory Automation: Facilitates streamlined network infrastructure using Single Pair Ethernet and PoDL, supporting flexible, scalable, and cost-effective layouts for manufacturing plants.
• Building Automation: Enables smart building solutions by simplifying network cabling and power distribution in extensive facilities.
• Device and System Integration: Assists manufacturers and system integrators in ensuring interoperability of Ethernet-APL and Ethernet-SPE devices at the port level, supporting easier upgrades and expansions.
• Engineering and Maintenance: Provides standardized profiles to simplify examination and validation of interconnections, reducing engineering efforts and maintenance risks.

Related Standards

For comprehensive conformity and best practices, IEC TS 63444:2026 should be considered in alignment with the following standards:

• IEEE Std 802.3-2022: Defines the foundational Ethernet physical layer, including 10BASE-T1L and PoDL requirements.
• IEC TS 60079-47: Specifies the 2-WISE concept for 2-wire intrinsically safe Ethernet in hazardous areas.
• IEC 61158-2: Outlines industrial communication network physical layer, relevant for process networks.
• IEC 63171: Addresses requirements for connectors used in single-pair Ethernet installations.
• IEC 61643-21: Covers surge protective devices for telecom and signaling networks, including Ethernet.
• ISO/IEC 11801-1: Provides requirements on generic cabling systems for customer premises.
• IEC 60079-11 / -14 / -25: Key for equipment and installation practices in explosive atmospheres.

IEC TS 63444:2026 enhances the effectiveness and reliability of industrial Ethernet networks, providing clarity and safety for both hazardous and non-hazardous environments through clearly defined port, power, and topological specifications. This ensures robust, future-proofed digital infrastructure for industrial and building operations.