1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationOptical fibre cablesPart 2-21: Indoor optical fibre cables Detailed specification for multi-fibre optical distribution cables for use in premises cablingBS EN 60794-2-21:2012Nati
2、onal forewordThis British Standard is the UK implementation of EN 60794-2-21:2012. It is identical to IEC 60794-2-21:2012. It supersedes BS EN 60794-2-21:2006, which is withdrawn.The UK participation in its preparation was entrusted by Technical Committee GEL/86, Fibre optics, to Subcommittee GEL/86
3、/1, Optical fibres and cables.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institutio
4、n 2012Published by BSI Standards Limited 2012 ISBN 978 0 580 71602 7 ICS 33.180.10Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 August 2012.Amendments issue
5、d since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 60794-2-21:2012EUROPEAN STANDARD EN 60794-2-21 NORME EUROPENNE EUROPISCHE NORM August 2012 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektr
6、otechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels 2012 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60794-2-21:2012 E ICS 33.180.10 Supersedes EN 60794-2-21:2006English version Optical fibre cables - Pa
7、rt 2-21: Indoor optical fibre cables - Detailed specification for multi-fibre optical distribution cables for use in premises cabling (IEC 60794-2-21:2012) Cbles fibres optiques - Partie 2-21: Cbles fibres optiques intrieurs - Spcification particulire pour les cbles optiques multi-fibres de distribu
8、tion utiliss dans le cblage de locaux (CEI 60794-2-21:2012) Lichtwellenleiterkabel - Teil 2-21: LWL-Innenkabel - Bauartspezifikation fr Mehrfaserverteilerkabel zur Innenverlegung fr anwendungsneutrale Standortverkabelung (IEC 60794-2-21:2012) This European Standard was approved by CENELEC on 2012-06
9、-19. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obta
10、ined on application to the CEN-CENELEC Management Centre or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified t
11、o the CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece
12、, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 60794-2-21:2012EN 60794-2-21:2012 Foreword The text of document 86A/1441/FDIS, future edi
13、tion 2 of IEC 60794-2-21, prepared by SC 86A “Fibres and cables”, of IEC/TC 86 “Fibre optics“, was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 60794-2-21:2012. The following dates are fixed: latest date by which the document has to be implemented at national level by pub
14、lication of an identical national standard or by endorsement (dop) 2013-03-19 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2015-06-19 This document supersedes EN 60794-2-21:2006. EN 60794-2-21:2012 includes the following significant technical c
15、hanges with respect to EN 60794-2-21:2006: - incorporation of the OM4 cabled fibre performance category; - incorporation of the OS2 cabled fibre performance category; - incorporation of the B6_a1 and B6_a2 fibre category as per EN 60793-2-50:2008. Attention is drawn to the possibility that some of t
16、he elements of this document may be the subject of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC 60794-2-21:2012 was approved by CENELEC as a European Standard without any m
17、odification. BS EN 60794-2-21:2012EN 60794-2-21:2012 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its applicat
18、ion. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publi
19、cation Year Title EN/HD Year IEC 60793-2-10 2007 Optical fibres - Part 2-10: Product specifications - Sectional specification for category A1 multimode fibres EN 60793-2-101)207 IEC 60793-2-50 2008 Optical fibres - Part 2-50: Product specifications - Sectional specification for class B single-mode f
20、ibres EN 60793-2-50 2008 IEC 60794-1-1 + corr. January 2011 2012 Optical fibre cables - Part 1-1: Generic specification - General EN 60794-1-1 2011 IEC 60794-1-2 2003 Optical fibre cables - Part 1-2: Generic specification - Basic optical cable test procedures EN 60794-1-2 2003 IEC 60794-2 2002 Optic
21、al fibre cables - Part 2: Indoor cables - Sectional specification EN 60794-2 2003 IEC 60794-2-20 2008 Optical fibre cables - Part 2-20: Indoor cables - Family specification for multi-fibre optical distribution cables EN 60794-2-20 2010 1) EN 60793-2-10 is superseded by EN 60793-2-10:2011, which is b
22、ased on IEC 60793-2-10:2011. BS EN 60794-2-21:201260794-2-21 IEC:2012 CONTENTS 1 Scope . . 5 2 Normative References . . 5 3 General requirements . 5 4 Particular requirements 6 4.1 Fibre selection for cable testing . . 6 4.2 Environmental requirements Temperature cycling . 6 4.3 Transmission require
23、ments . 6 4.3.1 Attenuation of cabled fibre 6 4.3.2 Fibre bandwidth requirements. . 7 Bibliography . 8 Table 1 Multimode maximum cable attenuation coefficient (dB/km) 7 Table 2 Single-mode maximum cable attenuation coefficient (dB/km) . 7 Table 3 Minimum multimode fibre bandwidth (MHz km) . 7 BS EN
24、60794-2-21:201260794-2-21 IEC:2012 5 OPTICAL FIBRE CABLES Part 2-21: Indoor optical fibre cables Detailed specification for multi-fibre optical distribution cables for use in premises cabling 1 Scope This International Standard presents the detailed requirements specific to this type of cable to ens
25、ure compatibility with ISO/IEC 11801, Information technology Generic cabling for customer premises. The requirements of the Family Specification IEC 60794-2-20:2008 are applicable to cables covered by this standard. Particular requirements detailed in clause 4 either define a specific option relativ
26、e to the requirements of IEC 60794-2-20:2008 or define additional requirements. 2 Normative References The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undate
27、d references, the latest edition of the referenced document (including any amendments) applies. They complete the normative references already listed in the generic specification (IEC 60794-1-1:2011 and IEC 60794-1-2:2003,) and in the sectional specification (IEC 60794-2:2002, Clause 2) or in the fa
28、mily specification (IEC 60794-2-20:2011, Clause 2). IEC 60793-2-10:2007, Optical fibres Part 2-10: Product specifications Sectional specification for category A1 multimode fibres IEC 60793-2-50:2008, Optical fibres Part 2-50: Product specifications Sectional specification for class B single-mode fib
29、res IEC 60794-1-1:2011, Optical Fibre cables Part 1-1: Generic specification General IEC 60794-1-2:2003, Optical fibre cables Part 1-2: Generic specification Basic optical cable test procedures IEC 60794-2:2002, Optical fibre cables Part 2: Indoor cables Sectional specification IEC 60794-2-20:2008,
30、Optical fibre cables Part 2-20: Indoor cables Family specification for multi-fibre optical distribution cable 3 General requirements The cable shall comply with the family specification (IEC 60794-2-20:2008) and meet the requirements that are defined in it. The optical fibre contained in the cables
31、which are covered by this standard shall comply with one of the following standards and meet the normative requirements defined within them as applicable: BS EN 60794-2-21:2012 6 60794-2-21 IEC:2012 IEC 60793-2-50:2008, Annex A Single-mode B1.1 fibre IEC 60793-2-50:2008, Annex C Single-mode B1.3 fib
32、re IEC 60793-2-50:2008, Annex G Single-mode B6_a1 and B6_a2 fibre IEC 60793-2-10:2007, Annex A Multimode A1a.1, 50 m core fibre IEC 60793-2-10:2007, Annex A Multimode A1a.2, 50 m core fibre IEC 60793-2-10:2007, Annex A Multimode A1a.3, 50 m core fibre IEC 60793-2-10:2007, Annex B Multimode A1b, 62.5
33、 m core fibre To ensure compatibility with ISO/IEC 11801, optical performance level requirements are presented in terms of the performance classification codes for cabled optical fibre as follows: OS1 Single-mode fibre, B1.1, B1.3 category or sub-category B6_a1 and B6_a2; OS2 Single-mode fibre, B1.3
34、 or sub-category B6_a1 and B6_a2; OM1 Multimode fibre, Model A1a.1 or sub-category A1b; OM2 Multimode fibre, Model A1a.1 or sub-category A1b; OM3 Multimode fibre, Model A1a.2; OM4 Multimode fibre, Model A1a.3; NOTE These codes are informative from the perspective of the requirements defined in this
35、detailed specification. 4 Particular requirements 4.1 Fibre selection for cable testing The fibre selection for cable testing shall be performed according to the 60794-1-1:2011, Annex B. 4.2 Environmental requirements Temperature cycling The cable shall meet the requirement of IEC 60794-2-20:2008, c
36、lause 4.3 Table 2, option c (20 C to +60 C). The test shall be performed on a 50 m specimen. No attenuation changes (according to the IEC 60794-1-1 annex B3) shall be allowed during the test. 4.3 Transmission requirements 4.3.1 Attenuation of cabled fibre Depending on the fibre category, the attenua
37、tion coefficient of the cabled fibre shall be less than the maximum values in Table 1 for the multimode fibres and less than the maximum values in Table 2 for single-mode fibres for the wavelengths listed in Table 2. The fibre category shall be agreed between customer and supplier. BS EN 60794-2-21:
38、201260794-2-21 IEC:2012 7 Table 1 Multimode maximum cable attenuation coefficient (dB/km) Fibre Attenuation coefficient at 850 nm Attenuation coefficient at 1300 nm Performance codes IEC 60793-2-10:2007, A1a.1 3,5 1,5 OM1 OM2 IEC 60793-2-10:2007, A1a.2 3,5 1,5 OM1 OM2 OM3 IEC 60793-2-10:2007, A1a.3
39、3,5 1,5 OM1 OM2 OM3 OM4 IEC 60793-2-10:2007, A1b 3,5 1,5 OM1 OM2 Table 2 Single-mode maximum cable attenuation coefficient (dB/km) Fibre 0 Wavelengths (nm) Maximum attenuation coefficient Performance codes IEC 60793-2-50:2008, B1.1, B1.3, B6_a1, B6_a2 1 310, 1 550 1,0 OS1 IEC 60793-2-50:2008, B1.1,
40、B1.3, B6_a1, B6_a2 1 310, 1 383, 1 550 0,4 OS2 4.3.2 Fibre bandwidth requirements There are no bandwidth requirements on single-mode fibre. For cables containing multimode fibres, the uncabled fibre shall be specified at one of performance levels defined in Table 3 in terms of minimum bandwidth (MHz
41、 km), wavelength, and type of measurement. The fibre category and performance level shall be agreed between customer and supplier. Table 3 Minimum multimode fibre bandwidth (MHz km) Fibre Nominal core diameter (m) Overfilled bandwidth at 850 nm Overfilled bandwidth at 1300 nm Effective modal bandwid
42、th at 850 nm* Performance codes IEC 60793-2-10:2007, A1a.1 50 200 500 na OM1 IEC 60793-2-10:2007, A1a.1 50 500 500 na OM2 IEC 60793-2-10:2007, A1a.2 50 1 500 500 2 000 OM3 IEC 60793-2-10:2007, A1a.3 50 3 500 500 4 700 OM4 IEC 60793-2-10:2007, A1b 62,5 200 500 na OM1 IEC 60793-2-10:2007, A1b 62,5 500
43、 500 na OM2 BS EN 60794-2-21:2012 8 60794-2-21 IEC:2012 Bibliography ISO/IEC 11801, Information technology Generic cabling for customer premises _ BS EN 60794-2-21:2012This page deliberately left blankBSI is the independent national body responsible for preparing British Standards and other standard
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