IEC 61753-121-2:2017

Overview

IEC 61753-121-2:2017 is an international standard published by the International Electrotechnical Commission (IEC) focusing on the performance requirements for fibre optic simplex and duplex cords. Specifically, it applies to cords with single-mode fibre terminated by cylindrical ferrule connectors designed for Category C controlled environments. This standard outlines stringent test requirements for cords, including reference cords, ensuring they meet defined optical, mechanical, and environmental performance criteria. It encompasses cords used within the wavelength range from 1260 nm to 1625 nm.

The standard addresses cords typically short in length for testing purposes, highlighting the importance of considering attenuation and temperature cycling effects for cords longer than 5 meters. It harmonizes with related IEC standards governing fibre optics connectors, fibres, and cable construction, thereby ensuring comprehensive usability in controlled environments.

Key Topics

• Scope and Applicability: Defines test requirements for simplex and duplex fibre optic cords with single-mode fibres and cylindrical ferrule connectors within controlled (Category C) environments.

• Test Requirements: Specifies a subset of connector tests derived from IEC 61753-1, with added emphasis on cord and connector/cable interface performance tests.

• Optical Performance: Covers attenuation, return loss, and fiber optical characteristics relevant to single-mode fibres within specified wavelengths.

• Mechanical and Environmental Performance: Details durability and environmental resilience requirements, including temperature cycling, mechanical stresses, and visual examinations of cable sheath integrity.

• Connector Specifications: Ensures compliance with mechanical interfaces as per IEC 61754 series and optical connector interfaces per IEC 61755 series.

• Fiber and Cable Specifications: Referenced from IEC 60793-2-50 (optical fibres) and IEC 60794-2-50 (indoor cables for cords), respectively.

• Revisions and Updates: This second edition of IEC 61753-121-2 merges certain optical performance requirements, removes outdated annexes, and aligns document structure with the latest ISO/IEC directives.

Applications

IEC 61753-121-2:2017 is essential for manufacturers, testers, and quality assurance professionals involved in the production and verification of fibre optic cords used in controlled environments. Typical applications include:

• Telecommunications: Ensuring durability and performance consistency of patch cords in controlled indoor settings.

• Data Centers: Maintaining high reliability of fibre optic interconnections critical to network infrastructure stability.

• Laboratory Testing: Providing standardized test methods to assess reference and operational cords under environmental stresses.

• Equipment Integration: Verifying compatibility and performance of cords connecting fibre optic devices compliant with Category C requirements.

This standard supports optimizing the longevity and reliability of simplex and duplex cords, thereby enhancing overall fibre optic network performance in sensitive operational environments.

Related Standards

• IEC 61753-1: General performance standards for fibre optic interconnecting devices and passive components; foundational for Category C environmental requirements.

• IEC 61754 Series: Defines mechanical interface standards for connector sets to ensure interchangeability and proper fitting.

• IEC 61755 Series: Specifies optical interfaces for fibre optic connectors, ensuring consistent optical performance.

• IEC 60793-2-50: Details product specifications for single-mode optical fibres used in cords.

• IEC 60794-2-50: Covers cabling subjects, specifically indoor optical fibre cables used in cord construction.

By integrating requirements from these interconnected standards, IEC 61753-121-2:2017 facilitates a thorough approach to testing and qualification of fibre optic cords intended for controlled environments, enabling industry-wide consistency and quality assurance.

Keywords: IEC 61753-121-2, fibre optic cords, single-mode fibre, cylindrical ferrule connectors, Category C, controlled environment, simplex cords, duplex cords, optical performance, mechanical performance, environmental testing, IEC standards, fibre optic connectors, fibre optic cables.