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1、a Date: 7 August 2008 Origin: International Latest date for receipt of comments: 30 November 2008 Project no.: 2006/00577 Responsible committee: EPL/46 Cables, wires and waveguides, radio frequency connectors and accessories for communication and signalling Interested committees: Title: Draft BS EN
2、61935-2 Specification for the testing of balanced and coaxial information technology cabling Part 2 Patch cords and work area cords as specified in ISO/IEC 11801 and related standards Supersession information: If this document is published as a standard, the UK implementation of it will supersede BS
3、EN61935-2 : 2005 and partially supersede. NONE If you are aware of a current national standard which may be affected, please notify the secretary (contact details below). WARNING: THIS IS A DRAFT AND MUST NOT BE REGARDED OR USED AS A BRITISH STANDARD. THIS DRAFT IS NOT CURRENT BEYOND 30 November 200
4、8. This draft is issued to allow comments from interested parties; all comments will be given consideration prior to publication. No acknowledgement will normally be sent. See overleaf for information on commenting. No copying is allowed, in any form, without prior written permission from BSI except
5、 as permitted under the Copyright, Designs and Patent Act 1988 or for circulation within a nominating organization for briefing purposes. Electronic circulation is limited to dissemination by e-mail within such an organization by committee members. Further copies of this draft may be purchased from
6、BSI Customer Services, Tel: +44(0) 20 8996 9001 or email . British, International and foreign standards are also available from BSI Customer Services. Information on the co-operating organizations represented on the committees referenced above may be obtained from the responsible committee secretary
7、. Cross-references The British Standards which implement International or European publications referred to in this draft may be found via the British Standards Online Service on the BSI web site http:/. Direct tel: 0208 996 7281 Responsible Committee Secretary: Mr S Bounds (BSI) E-mail: Draft for
8、Public Comment Head Office 389 Chiswick High Road London W4 4AL Telephone: +44(0)20 8996 9000 Fax: +44(0)20 8996 7001 Form 36 Version 8.0 DPC: 08/30146611 DC Licensed CopyChinese University of Hong Kong, 21/10/2008 04:02, Uncontrolled Copy, (c) BSI b Introduction This draft standard is based on inte
9、rnational discussions in which the UK has taken an active part. Your comments on this draft are welcome and will assist in the preparation of the consequent standard. If no comments are received to the contrary, then the UK will approve this draft. There is a high probability that this text could be
10、 adopted by CENELEC as a reference document for harmonization or as a European Standard. Recipients of this draft are requested to comment on the text bearing in mind this possibility. UK Vote Please indicate whether you consider the UK should submit a negative (with reasons) or positive vote on thi
11、s draft. Submission The guidance given below is intended to ensure that all comments receive efficient and appropriate attention by the responsible BSI committee. Annotated drafts are not acceptable and will be rejected. All comments must be submitted, preferably electronically, to the Responsible C
12、ommittee Secretary at the address given on the front cover. Comments should be compatible with Version 6.0 or Version 97 of Microsoft Word for Windows, if possible; otherwise comments in ASCII text format are acceptable. Any comments not submitted electronically should still adhere to these format r
13、equirements. All comments submitted should be presented as given in the example below. Further information on submitting comments and how to obtain a blank electronic version of a comment form are available from the BSI web site at: http:/ Template for comments and secretariat observations Date: xx/
14、xx/200x Document: ISO/DIS xxxxx 1 2 (3) 4 5 (6) (7) MB Clause No./ Subclause No./ Annex (e.g. 3.1) Paragraph/ Figure/Table/ Note (e.g. Table 1) Type of com- ment Comment (justification for change) by the MB Proposed change by the MB Secretariat observations on each comment submitted 3.1 Definition 1
15、 ed Definition is ambiguous and needs clarifying. Amend to read . so that the mains connector to which no connection . 6.4 Paragraph 2 te The use of the UV photometer as an alternative cannot be supported as serious problems have been encountered in its use in the UK. Delete reference to UV photomet
16、er. Microsoft and MS-DOS are registered trademarks, and Windows is a trademark of Microsoft Corporation. Licensed CopyChinese University of Hong Kong, 21/10/2008 04:02, Uncontrolled Copy, (c) BSI FORM CD (IEC) 2007-02-12 46/294/CD COMMITTEE DRAFT (CD) IEC/TC or SC: TC 46 Project number IEC 61935-2/E
17、d. 3.0 Title of TC/SC: Cables, wires, waveguides, R.F. connectors, R.F. and microwave passive components and accessories Date of circulation 2008-08-08 Closing date for comments 2008-09-25 (see note below) Also of interest to the following committees ISO/IEC JTC1 SC25, SC46C Supersedes document 46/2
18、92/MCR Functions concerned: Safety EMC Environment Quality assurance Secretary: John Kincaid THIS DOCUMENT IS STILL UNDER STUDY AND SUBJECT TO CHANGE. IT SHOULD NOT BE USED FOR REFERENCE PURPOSES. RECIPIENTS OF THIS DOCUMENT ARE INVITED TO SUBMIT, WITH THEIR COMMENTS, NOTIFICATION OF ANY RELEVANT PA
19、TENT RIGHTS OF WHICH THEY ARE AWARE AND TO PROVIDE SUPPORTING DOCUMENTATION. Title: IEC 61935-2: Specification for the testing of balanced and coaxial information technology cabling - Part 2 Patch cords and work area cords as specified in ISO/IEC 11801 and related standards (Titre) : Introductory no
20、te: Comments to this CD will be considered, by the relevant experts, during the next meeting of IEC/ISO JTC1 SC25/WG3 to take place during the week starting 20 October 2008. National committees are kindly requested to send comments to be considered directly to the TC 46 Secretary before 25 September
21、 2008. Copyright 2008 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to download this electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions. You may not copy or “mirror“ the file or printed ve
22、rsion of the document, or any part of it, for any other purpose without permission in writing from IEC. Licensed CopyChinese University of Hong Kong, 21/10/2008 04:02, Uncontrolled Copy, (c) BSI 61935-2/Ed. 3 CD IEC:200X 2 46/294/CD CONTENTS 1 Scope.8 2 Normative references .8 3 Definitions 8 4 Gene
23、ral requirements and test configuration. .8 4.1 Cable and connector design 8 4.2 Cable assembly, cable and connector tests .8 4.3 Test configuration and equipment9 4.4 Modular plug cord tests requirements10 5 Acceptance tests 10 5.1 Visual inspection .10 5.2 Wire Map.11 5.3 Propagation delay .13 5.4
24、 Delay skew13 5.5 Insertion loss.13 5.6 Return loss13 5.6.1 Object13 5.6.2 Test method 13 5.6.3 Test set-up 13 5.6.4 Test report.13 5.6.5 Requirements 14 5.7 Near End Crosstalk (NEXT).15 5.7.1 Object15 5.7.2 Test method 15 5.7.3 Test set-up 15 5.7.4 Test report.16 5.7.5 Requirements 16 5.8 Assumptio
25、ns used in the development of patch cord requirements. .19 6 Modular Plug Cord Test Procedure.19 6.1 Network analyser test configuration.19 7 Periodic tests20 7.1 General .20 7.2 Tensile Strength 20 7.2.1 Object20 7.2.2 Procedure20 7.2.3 Requirements 20 7.2.4 Detail specification 20 7.3 Flexure20 7.
26、3.1 Object20 7.3.2 Procedure21 7.3.3 Requirements 21 7.3.4 Information to be given in the detail specification.21 7.4 Bending.21 7.4.1 Object21 Licensed CopyChinese University of Hong Kong, 21/10/2008 04:02, Uncontrolled Copy, (c) BSI 61935-2/Ed. 3 CD IEC:200X 3 46/294/CD 7.4.2 Procedures22 7.5 Twis
27、ting.22 7.5.1 Object22 7.5.2 Procedures22 7.5.3 Requirements 23 7.6 Crushing23 7.6.1 Object23 7.6.2 Procedure23 7.6.3 Requirements 24 7.6.4 Information to be given in the detail specification.24 7.7 Dust test24 7.7.1 Object24 7.7.2 Procedure24 7.7.3 Requirements 25 7.7.4 Information to be given in t
28、he detail specification.25 7.7.5 Test chamber.25 7.8 Coupling attenuation .26 7.9 Climatic sequence .27 7.9.1 Object27 7.9.2 Procedure27 7.9.3 Requirements 27 7.9.4 Information to be given in the detail specification.27 8 Test head requirements27 8.1 General .27 8.2 Minimum requirements for all test
29、 head designs 27 8.3 Additional FEXT requirements for modular 8-pin compatible test heads.28 8.4 Additional return loss requirements for modular 8-pin compatible test heads .28 8.5 NEXT loss centering requirements for modular 8-pin compatible test heads 28 Figure 1: Transmission performance test con
30、figuration for patch cords for NEXT and return loss.10 Figure 2 Correct pairing .11 Figure 3 Incorrect pairing .12 Figure 4: Fixture for cable assembly flexure test .21 Figure 5: Bending test: assembly in U shape.22 Figure 6: Twisting test: assembly in U shape 23 Figure 7: Fixture for cable crushing
31、 test 24 Figure 8: Measuring device.26 Figure 9: Centering of NEXT properties of the modular 8-pin test head .29 Table 1: Return loss requirements for patch cords. .15 Table 2: Patch cord return loss requirements at key frequencies (informative). .15 Table 3a: Category 5 patch cord NEXT requirements
32、 at key frequencies (informative)17 Table 3b: Category 6 patch cord NEXT requirements at key frequencies (informative)17 Table 3c: Category 6A patch cord NEXT requirements at key frequencies (informative). (ffs) 17 Table 3d: Category 7 patch cord NEXT requirements at key frequencies (informative)17
33、Licensed CopyChinese University of Hong Kong, 21/10/2008 04:02, Uncontrolled Copy, (c) BSI 61935-2/Ed. 3 CD IEC:200X 4 46/294/CD Table 3e Category 7A patch cord NEXT requirements at key frequencies (informative). (ffs) 17 Table 4: Assumptions for cabling components used in the development of NEXT an
34、d return loss requirements. 19 Table 5: Coupling attenuation limits 27 Licensed CopyChinese University of Hong Kong, 21/10/2008 04:02, Uncontrolled Copy, (c) BSI 61935-2/Ed. 3 CD IEC:200X 5 46/294/CD INTRODUCTION Modular plug cords are constructed for connecting equipment using modular connecting ha
35、rdware. It is known that connecting hardware performance is subject to influence by the properties of the modular plug termination and therefore modular plug cords should be tested to determine the quality of the assembly. Moreover the performance of modular plug cords may differ due to the performa
36、nces of the involved separate components depending upon the efficiency of the manufacturing procedure. Manufacturing procedures also impact on the reliability of these cords. Therefore, the object of this standard is to provide test methods to ensure compatibility of modular plug cords to be used in
37、 cabling according to ISO/IEC 11801. Also to provide test methods and associated requirements to demonstrate the performance and reliability of these cords during their operational lifetime. Licensed CopyChinese University of Hong Kong, 21/10/2008 04:02, Uncontrolled Copy, (c) BSI 61935-2/Ed. 3 CD I
38、EC:200X 6 46/294/CD INTERNATIONAL ELECTROTECHNICAL COMMISSION _ Specification for the testing of balanced and coaxial information technology cabling Part 2: Patch cords and work area cords as specified in ISO/IEC 11801 and related standards FOREWORD 1) The International Electrotechnical Commission (
39、IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addit
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41、ed in the subject dealt with may participate in this preparatory work. International, governmental and non- governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with
42、 conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IE
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44、the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between a
45、ny IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 6) All users sh
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48、f the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rig
49、hts. International Standard IEC 61935-2 has been prepared by IEC technical committee TC 46: Cables, wires, waveguides, R.F. connectors, R.F. and microwave passive components and accessories The text of this standard is based on the following documents: FDIS Report on voting XX/XX/FDIS XX/XX/RVD Full information on the voting for the approval of this standard can be found in the repor