IEC 61935-2:2010

Overview

IEC 61935-2:2010 is an international standard developed by the International Electrotechnical Commission (IEC) that specifies testing methods for balanced cords used in information technology cabling systems. Covering cords as specified in ISO/IEC 11801 and related standards, this third edition updates the testing framework to include balanced cords from Category 6A to Category 7A. The standard ensures the compatibility, performance, and reliability of these cords during their operational lifetime.

Balanced cords play a critical role in connecting IT equipment through free connectors defined by IEC 60603-7 series and related connector standards. Given that connecting hardware performance is influenced by cord terminations and manufacturing quality, IEC 61935-2:2010 provides comprehensive test procedures that help manufacturers and network deployers guarantee the quality and functionality of these essential components in structured cabling systems.

Key Topics

• Test Scope and Configuration
  The standard covers balanced cords incorporating twisted pairs terminated with free connectors. It includes test setups, cable and connector design criteria, and details on test equipment configurations essential for consistent measurements.

• Performance Tests
  Key electrical property evaluations include:

  • Insertion loss
  • Return loss
  • Near End Crosstalk (NEXT)
  • Propagation delay and delay skew

• Acceptance and Periodic Testing
  The document sets requirements for:

  • Visual inspection and wire map verification to detect physical defects and wiring accuracy
  • Mechanical tests including tensile strength, flexure, bending, twisting, and crushing to verify durability under normal usage
  • Environmental tests such as dust exposure and climatic sequences to assess cord robustness in different conditions

• Test Head Requirements
  The standard details minimum specifications for test heads used in the evaluation process, ensuring precise loss centering, return loss measurement, and crosstalk properties.

• Cord Categories Supported
  IEC 61935-2:2010 extends testing methodology to support advanced cabling categories conforming to ISO/IEC 11801 standards, spanning Category 6A through Category 7A cords.

Applications

• Structured Cabling Systems
  Designed for use in enterprise networks, data centers, and telecommunications facilities, the standard helps maintain the performance integrity of balanced cords within structured cabling infrastructures.

• Manufacturing Quality Control
  Cable manufacturers use these test methods during production to validate cord assemblies and ensure they meet stringent performance criteria for high-speed data transmission.

• Network Equipment Compatibility
  Ensures balanced cords seamlessly connect IT equipment according to international interoperability standards, preventing signal degradation or failures due to poor cable assembly or component mismatch.

• Reliability Assurance Across Cord Lifespan
  The mechanical and environmental test methods help predict and verify cord durability, ensuring dependable network operation under varying installation and operational conditions.

Related Standards

• ISO/IEC 11801 – International standard defining generic cabling for customer premises, specifying cabling system architectures including balanced cords.

• IEC 60603-7 Series – Standard series covering connectors for balanced copper cabling, critical for physical interface specifications.

• IEC 61076-3-104 and IEC 61076-3-110 – Standards focusing on specific free connector types used in balanced cords.

• IEC 61935-1 – Part 1 of the series specifying testing of balanced and coaxial cabling, dealing primarily with permanent links.

By applying IEC 61935-2:2010, stakeholders can ensure balanced cords meet internationally recognized technical and quality benchmarks, supporting high-performance and robust IT infrastructure cabling deployments worldwide.