IEC 60874-14-4:1997 PDF

Overview

IEC 60874-14-4:1997 is an IEC detail specification for the SC (simplex) fibre optic adaptor for multimode fibre. Published in 1997 by IEC subcommittee 86B, it defines mechanical dimensions, materials variants, performance requirements and qualification/inspection procedures for SC push-pull adaptors used in datacom applications. The document complements the generic IEC 60874-1 family and ties test methods to the IEC 61300 series.

Key topics and technical requirements

• Scope and classification: Type SC, configuration plug–adaptor–plug, push–pull coupling, intended for multimode fibre (MMF) and datacom (e.g., ISO/IEC 11801).
• Mechanical dimensions and alignment: Detailed mating-face and housing control dimensions are specified (including a pin-gauge for alignment sleeve). The adaptor alignment feature is an alignment sleeve; gauge retention force is specified and measured with two gauge pins.
• Materials and variants: Variant options include plastic or metal housings and sleeves made from zirconia or phosphor bronze; standard colour for MMF adaptors is Beige (RAL 1013).
• Performance / optical limits:
  • Attenuation: Allowable attenuation less than 0.2 dB against two reference plugs (LED source, peak 1.3 µm). Reference adaptor selection criteria and measurement averaging are specified.
  • Environmental: Climatic category 10/60/4, environmental category 4, assessment level A.
  • Example cold test: attenuation limits and change during cold cycling (–10 °C) are specified (attenuation