Overview
ISO/IEC 11801-3:2017/AMD1:2021 is Amendment 1 to Part 3 of the ISO/IEC 11801 series - Generic cabling for customer premises - Industrial premises. This amendment adds requirements and recommendations to support balanced 1‑pair cabling (Single Pair Ethernet / SPE) in industrial environments, updates normative references, defines new terms (e.g., balanced 1‑pair cabling channel, edge distributor) and extends end‑to‑end link and channel performance guidance for industrial installations.
Key topics and technical requirements
- Balanced 1‑pair cabling support: Introduces channel and link models for 1‑pair cabling, including 40 m and 1 000 m channel configurations, and associated modeling assumptions (segment lengths, cord allowances).
- Performance classes and frequencies: References channel performance up to 600 MHz (40 m model) and 20 MHz (1 000 m model) and links SPE to appropriate cable and connector standards.
- New normative references: Adds IEC 63171‑6 (2‑way/4‑way shielded data/power connectors) and IEC 61156‑11 / IEC 61156‑12 for single pair cable specifications.
- End‑to‑end and channel testing: Points to measurement and test guidance via updated reference to ISO/IEC 14763‑4 and Annexes C and E for channel and link test interfaces.
- Topologies and components: Defines edge distributor (ED) as an optional element to transition from balanced 4‑pair to 1‑pair cabling in industrial intermediate cabling; clarifies bulkhead, segment, and connection symbols and counts.
- Installation considerations: Addresses cable sharing, environmental derating (temperature impacts on allowable lengths), and mechanical/physical requirements for connecting hardware at the telecommunications outlet per IEC 63171‑6.
Practical applications and users
This amendment is intended for:
- Industrial network designers and consultants specifying factory-floor and process-control cabling
- Plant engineers and automation integrators deploying Industrial Ethernet / SPE for IIoT, sensors, actuators and edge devices
- Cabling contractors and installers implementing combined generic and industrial cabling topologies (including Automation Islands and edge distributors)
- Cable and connector manufacturers aligning products to IEC/ISO normative references
Practical use cases include simplified power-and-data delivery to field devices via SPE, longer‑distance single‑pair links for distributed I/O, and hybrid installations transitioning from 4‑pair to 1‑pair infrastructures.
Related standards (selected)
This amendment equips industrial stakeholders with updated guidance to deploy robust, tested single pair Ethernet cabling within industrial premises using harmonized connector and cable standards.
Open preview (PDF)Amendment 1 - Information technology - Generic cabling for customer premises - Part 3: Industrial premises
