PDIEC/TS62965:2016 IECTS62965:2016@IEC2016 - 7 - Table2-Dimensionsfora1,25mmdiametercylindricalferruleassembly Dimensions in millimetres Dimensions Reference Remarks Minimum Maximum A,a 4,7 11,75 Length of the bare fibre portion B, = 8,3 15,2 7,65 The boundary between B, and C, is at the rear end of the largest flange D; - 5,25 The overall dimension of the flange Ef 2,55 A, shall be less than B, 5.3 Fusion splicer interface Fibre alignment block A-A Top view A+ 1 As A+ Area to be reserved for ferrule assembly holders Fibre centre Holder stage Electrode IEC Figure 2-Fusion splicer interface Table3-Dimensionsforthefusionsplicerinterface Dimensions in millimetres Reference Dimensions Remarks Minimum Maximum 4s 3,5 4,6 Ds 3,5 Applicable vertical position of the fibre from the top surface of the area for holders The area to be reserved for ferrule assembly holders shall be ≥ 11,5 mm in length and ≥ 5,6 mm in width and assemblies compliantwith this document. PDIEC/TS62965:2016 - 8 - IECTS62965:2016@IEC2016 Annex A (informative) Anexampleofauniversal holderinterface Typically, each Fsoc model has its original holder interface, i.e. a combination of a dedicated ferrule assembly holder design and one of its applicable fusion splicer models, so that the installation is optimised. This annex is provided as a guideline for users who plan to design/use a universal holder for various FsOC ferrule assemblies. It should be noted that the use of a universal holder may adversely affect the installation of the Fsoc ferrule assembly in the assembled FsoC. In conjunction with Figure A.1, examples of two universal holder interfaces are given in Table A.1 (for a 2,5 mm diameter ferrule type) and in Table A.2 (for a 1,25 mm ferrule type). These two examples are provided as sets of dimensional limits for a combination of the 2,5 mm or 1,25 mm ferrule assembly holders and the fusion splicer. Universal holders complying with these interfaces can accommodate any of the ferrule assemblies with their corresponding ferrule diameters as specified in this document. In Figure A.1, dimension Br varies during the fusion splicing process as the holder stage of the fusion splicer moves. In this fusion splicer interface, the Bn basic dimension is defined as the distance at the time of fusion splicing. Any value greater than B basic is allowed for Bp before the holder stage moves, as long as Bh can become equal to Bh basic at some point within the range of the holder stage movement. The minimum limits for Ch and En have some margin against corresponding maximum limits for theferrule assembly,CandEf,respectively,shown in Figure 1.These margins allow positional adjustment of the ferrule assembly in its holder to achieve fibre end placement between the electrodes and the fibre alignment block prior to fusion splicing. This fusion splicer inter face does not define the means to fix theferrule assembly holder onto the fusion splicer holder stage. Reference plane Fibrealignment block Ch Bn Area to be reserved for ferrule assembly Electrode Ferrule assembly holder Holder stage IEC FigureA.1-Anexampleofauniversal holderinterface PDIEC/TS62965:2016 IECTS62965:2016IEC2016 - 6 - TableA.1-Dimensionsfortheuniversal holderexample interface foraferruleassemblywitha2,5mmdiameter cylindricalferrule Dimensions inmillimetres Reference Dimensions Remarks Minimum Basic Maximum Bha At the time of fusion splicing Ch 18,1 50 Dh 5,6 10 En 9,9 50 The fusion splicer shall allow sufficient movement in order to be capable of aligning the cleaved fibre end with the electrode plane is the distance between the reference plane of the ferrule assembly holder and the electrode plane at the time Bh of fusion splicing. is variable corresponding to the ferrule assembly to be used. B, basic is defined as the minimum Bn value the holder interface in consideration can have, and it equals to B minimum of the ferrule assembly the holder interface can accept. For example, to accept all ferrule assemblies comp