Overview
IEC 61935-2:2022/AMD1:2026 is an International Electrotechnical Commission (IEC) amendment that updates the requirements for testing balanced and coaxial information technology cabling, specifically focusing on cords as specified in ISO/IEC 11801-1 and associated standards. This amendment extends the scope of IEC 61935-2, addressing the testing of both traditional balanced twisted-pair cords and the increasingly prevalent balanced single-pair cords. The document also references crucial related standards for cord components, performance test procedures, and physical test requirements, ensuring comprehensive and up-to-date guidance for cable manufacturers, installers, and testing professionals.
Key Topics
- Expanded Scope: Now includes balanced single-pair cords, along with balanced twisted-pair and coaxial cords, reflecting developments in information technology cabling.
- Updated Test Procedures: Outlines new and modified test methods and transmission requirements for single-pair balanced cords, including test procedures based on IEC 61935-4 and detailed in the new Annex C.
- Component Standards: Specifies cord component requirements, linking to relevant standards such as IEC 61156 series for cables and IEC 63171 connectors.
- Transmission Parameters: Provides requirements and optional specifications for parameters including return loss, insertion loss, alien crosstalk, coupling attenuation, propagation delay, and DC resistance.
- Measurement Methods: Adds coupling attenuation test requirements in line with IEC 62153-4-7 and related electromagnetic compatibility standards.
- Conformity and Testing: Emphasizes conformity to ISO/IEC 11801-1 for design and performance, and outlines detailed acceptance testing methods for cabling assemblies.
Applications
This amendment is vital for stakeholders engaged in the design, manufacturing, installation, and testing of information technology cabling systems, ensuring consistent performance, interoperability, and compliance with international standards.
- Cable Manufacturers: Guides the production of both balanced twisted-pair and single-pair cords, ensuring cable and connector components meet updated specifications.
- Test Laboratories: Provides updated test procedures and acceptance criteria for balanced and coaxial cords, facilitating reliable quality assurance and certification.
- Network Installers: Supports the selection and verification of compliant cords for structured cabling installations in data centers, offices, industrial environments, and smart building infrastructures.
- System Designers: Helps ensure interoperability across wired network infrastructures by adhering to unified test and performance requirements for a variety of cord types.
- End-Users/IT Professionals: Ensures network reliability, performance, and future-proofing by guiding the selection of standardized, tested cabling solutions.
Related Standards
- ISO/IEC 11801-1: International standard specifying generic cabling for customer premises - the foundational reference for cord requirements.
- IEC 61156 Series: Standards for multicore and symmetrical pair/quad cables, including single-pair cables used in modern applications.
- IEC 63171 (All Parts): Specifies connectors for balanced single-pair cabling, ensuring compatibility and performance in digital communications.
- IEC 61935-4: Requirements and test procedures for installed balanced single-pair cabling, complementing the testing guidelines for cords.
- IEC 62153-4-7, -4-11, -4-15: Test methods and electromagnetic compatibility requirements for measuring transfer impedance, screening attenuation, and related parameters in cables and assemblies.
- IEC 60512-28-100: Specifies test connectors and fixtures used in cord transmission performance testing.
IEC 61935-2:2022/AMD1:2026 plays a critical role in maintaining high quality and reliable performance for balanced and coaxial cabling systems, helping organizations meet global standards in structured cabling and network infrastructure. Its practical value lies in ensuring consistent, interoperable, and future-ready information technology networks across diverse environments.
