DIN EN IEC 63267-3-61:2026-01

This part of the IEC 63267 series defines the dimensional limits of an optical interface for reference connectors with 2,5 mm or 1,25 mm diameter cylindrical zirconia (ZrO2) ferrules necessary to meet specific requirements for fibre-to-fibre interconnection of non-angled polished multimode reference connections as defined in IEC 63267-2-2. Ferrule dimensions and features are contained in the IEC 61754 series of fibre optic connector interface standards. One grade of reference connector, Rm1, is defined in this document. The reference connector is terminated to restricted IEC 60793-2-10 using A1-OM2b to A1-OM5b fibre in 850 nm band only. The geometrical dimensions and tolerances of the specified reference connector have been developed primarily to limit the variation in measured attenuation between multiple sets of reference connectors, and therefore to reduce the variation in measured attenuation between an arbitrarily chosen reference connector when mated with a connector in the field or factory. This document describes the criteria for a fit within the reference performance grade, specifies the requirements for reference connectors, and provides the attenuation test limits for connectors of reference grade Rm1 that are mated with class Bm connectors for informational purposes in Annex A. There are no restrictions on the scope of application of this document. The values specified in this document for connectors may be used to select components of correspondingly high quality. These are then used to test the optical performance of connectors.