1、 INTERNATIONAL STANDARD ISO/IEC 24702First edition 2006-10Information technology Generic cabling Industrial premises Reference number ISO/IEC 24702:2006(E) INTERNATIONAL STANDARD ISO/IEC 24702First edition 2006-10Information technology Generic cabling Industrial premises PRICE CODE Copyright 2006 IS
2、O/IEC, Geneva All rights reserved No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Electrotechnical Commission, 3, rue de Varemb, PO B
3、ox 131, CH-1211 Geneva 20, Switzerland Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmailiec.ch Web: www.iec.ch W For price, see current catalogue 2 24702 ISO/IEC:2006(E) CONTENTS FOREWORD.7 INTRODUCTION.8 1 Scope.10 2 Normative references .10 3 Definitions and abbreviations13 3.1
4、Definitions.13 3.2 Abbreviations 15 4 Conformance15 5 Structure 16 5.1 General .16 5.2 Functional elements 16 5.3 Cabling subsystem 17 5.3.1 General structure.17 5.3.2 Campus backbone cabling subsystem .18 5.3.3 Building backbone cabling subsystem18 5.3.4 Floor cabling subsystem 18 5.3.5 Intermediat
5、e cabling subsystem.19 5.3.6 Centralized cabling architecture.19 5.3.7 Design objectives 19 5.4 Interconnection of subsystems 20 5.5 Accommodation of functional elements21 5.6 Interfaces 22 5.6.1 Equipment interfaces and test interfaces .22 5.6.2 Channels and permanent links.22 5.6.3 External networ
6、k interface .22 5.7 Dimensioning and configuring22 5.7.1 General .22 5.7.2 Distributors23 5.7.3 Cables.23 5.7.4 Apparatus attachment and equipment cords 23 5.7.5 Patch cords and jumpers .23 5.7.6 TO.23 5.7.7 Telecommunications rooms and equipment rooms.24 5.7.8 Industrial enclosures .24 5.7.9 Buildi
7、ng entrance facilities.24 6 Channel performance .24 6.1 General .24 6.2 Environmental performance.26 6.2.1 General .26 6.2.2 Environmental classification 26 6.3 Transmission performance 28 6.3.1 General .28 6.3.2 Balanced cabling .29 6.3.3 Optical fibre cabling.33 24702 ISO/IEC:2006(E) 3 7 Reference
8、 implementations 34 7.1 General .34 7.2 Balanced cabling.35 7.2.1 General .35 7.2.2 Intermediate cabling 35 7.2.3 Backbone cabling 35 7.3 Optical fibre cabling 35 7.3.1 General .35 7.3.2 Component choice.35 7.3.3 Maximum channel lengths .35 8 Cable requirements 36 8.1 Introduction .36 8.2 Operating
9、environment 36 8.3 Balanced cables37 8.4 Optical fibre cables37 8.4.1 All-silica optical fibre cables 37 8.4.2 Plastic optical fibre cables .38 8.4.3 Plastic clad silica optical fibre cables.39 8.4.4 Propagation delay .39 9 Connecting hardware requirements 39 9.1 Introduction .39 9.2 General require
10、ments40 9.2.1 Location 40 9.2.2 Design.40 9.2.3 Mounting .40 9.2.4 Marking and colour coding.41 9.3 Operating environment 41 9.4 Connecting hardware for balanced cabling 41 9.4.1 General requirements41 9.4.2 Performance marking 41 9.4.3 Operating environment 41 9.4.4 Mechanical and electrical charac
11、teristics of balanced connecting hardware .42 9.5 Connecting hardware for optical fibres 44 9.5.1 Operating environment 44 9.5.2 Connecting hardware for all-silica optical fibres.45 9.5.3 Connecting hardware for plastic optical fibres45 9.5.4 Connecting hardware for plastic clad silica fibres.46 10
12、Cords .47 10.1 General .47 10.2 Operating environment 47 10.3 Balanced cords .47 10.3.1 General .47 10.3.2 Cable insertion loss .48 10.3.3 Identification48 10.3.4 Operating environment 48 10.3.5 Electrical performance requirements for patch cords .49 4 24702 ISO/IEC:2006(E) 10.4 Optical fibre cords
13、.49 10.4.1 General .49 10.4.2 Identification50 10.4.3 Performance requirements for patch cords 50 10.4.4 Operating environment 50 Annex A (normative) Permanent link performance limits 52 A.1 General 52 A.2 Balanced cabling52 A.2.1 General .52 A.2.2 Additional requirements.53 A.2.3 Optical fibre cabl
14、ing 54 Annex B (normative) Test methods 55 B.1 General 55 B.1.1 Visual inspection .55 B.1.2 Measurements.55 B.2 Test parameters for balanced cabling.60 B.2.1 General .60 B.2.2 Wire map.60 B.2.3 Length.60 B.2.4 Propagation delay .60 B.2.5 Delay skew61 B.2.6 Attenuation (insertion loss)61 B.2.7 Near e
15、nd crosstalk loss (NEXT, pair-to-pair and power sum).61 B.2.8 Equal level far end crosstalk loss (ELFEXT, pair-to-pair and power sum) 61 B.2.9 Attenuation to crosstalk ratio (ACR, pair-to-pair and power sum).61 B.2.10 Return loss61 B.2.11 Coupling attenuation .61 B.2.12 Direct current (d.c.) loop re
16、sistance.62 B.3 Test parameters for optical fibre cabling.62 B.3.1 General .62 B.3.2 All-silica optical fibre .62 B.3.3 Plastic optical fibre62 B.3.4 Plastic clad silica optical fibre62 Annex C (normative) Reference implementations (not conforming to clause 5) 63 C.1 Introduction 63 C.2 Connection-l
17、ess channels.63 C.2.1 General .63 C.2.2 Channels with no connections .63 C.2.3 Channels with inter-connections64 C.3 Channels using balanced cabling bulkhead connections.65 Annex D (informative) Reference implementations.68 D.1 Introduction 68 D.2 Channels using balanced cabling bulkhead connections
18、 with additional connections68 24702 ISO/IEC:2006(E) 5 Annex E (informative) Supported applications71 E.1 Supported applications for balanced cabling.71 E.2 Supported applications for optical fibre cabling.71 Annex F (informative) Introduction to environmental classification in clause 6 .73 F.1 Gene
19、ral 73 F.2 Application of environmental classification73 F.2.1 MICE.73 F.2.2 Channel environment 73 F.2.3 Component selection.74 F.3 The MICE system .75 F.4 Guidance with respect to environmental classification 79 Bibliography83 Figure 1 Cabling specified by ISO/IEC 24702 and its relationship to OSI
20、 reference model layers .9 Figure 2 Configuration of apparatus-based functional elements within industrial premises.17 Figure 3 Structure of generic cabling for industrial environment .18 Figure 4 Hierarchical structure of generic cabling for industrial premises .20 Figure 5 Inter-relationship of fu
21、nctional elements in an installation with diversity for protection against failure.20 Figure 6 Accommodation of functional elements 21 Figure 7 Test and equipment interfaces .22 Figure 8 Transmission performance of a channel .25 Figure 9 Example of a system showing the location of cabling interfaces
22、 and extent of associated channels .25 Figure 10 Eight position jack pin and pair grouping assignments (front view of connector) 43 Figure 11 Four position jack pin and pair grouping assignments (front view of connector) 44 Figure A.1 Permanent link options .52 Figure B.1 Reference planes for link a
23、nd channels (point-to-point).56 Figure B.2 The test system and the cabling under test .57 Figure C.1 Balanced cabling channel configurations with no connections.64 Figure C.2 Balanced cabling channel configurations of Figure C.1 with interconnection at distributor.65 Figure C.3 Balanced cabling chan
24、nel configurations with bulkhead connections 66 Figure D.1 Channel configurations .69 Figure F.1 Example of variation of the environment along a cabling channel74 Figure F.2 The local environment.74 Figure F.3 Noise ranges of common industrial machine devices.80 Figure F.4 Guidance on separation of
25、cabling from noise sources82 Table 1 Channel environments.26 Table 2 Details of environmental classification.27 6 24702 ISO/IEC:2006(E) Table 3 Formulae for TCL limits for an unscreened cabling channel.30 Table 4 Informative TCL limits for an unscreened cabling channel at key frequencies30 Table 5 F
26、ormul for ELTCTL limits for an unscreened cabling channel .31 Table 6 Informative ELTCTL limits for an unscreened cabling channel at key frequencies.31 Table 7 Formul for coupling attenuation limits for a screened cabling channel 32 Table 8 Informative coupling attenuation limits for a screened cabl
27、ing channel at key frequencies.32 Table 9 Channel attenuation of optical fibre cabling channels 34 Table 10 Optical fibre channel length equivalence for connecting hardware .36 Table 11 Environmental performance specifications for balanced cables (in addition to IEC 61156-5-1 and IEC 61156-6-1).37 T
28、able 12 Singlemode optical fibre cable (Category OS2) performance requirements38 Table 13 Environmental performance specifications for optical fibre cables (in addition to IEC 60794-2 and IEC 60794-3)38 Table 14 Optical fibre cable performance requirements39 Table 15 Environmental performance specif
29、ications for balanced cabling connecting hardware 42 Table 16 Environmental performance specifications for optical fibre cabling connecting hardware.44 Table 17 Environmental performance specifications for balanced cords (in addition to IEC/PAS 61935-2-20) a) 49 Table 18 Environmental performance sp
30、ecifications for optical fibre cords (in addition to IEC 61753-X)51 Table B.1 Level of accuracy for balanced cabling tester.58 Table B.2 Cabling characteristics of balanced cabling for acceptance, compliance, and reference testing60 Table B.3 Cabling characteristics of optical fibre cabling for acce
31、ptance, compliance, and reference testing62 Table C.1 Channel equations for balanced cabling.65 Table C.2 Channel equations for bulkhead connections .67 Table D.1 Channel equations.70 Table E.1 Supported applications and maximum channel lengths with all-silica multimode optical fibres 71 Table E.2 S
32、upported applications and maximum channel lengths with all-silica singlemode optical fibres 72 Table E.3 Supported applications and maximum channel lengths with plastic optical fibres 72 Table F.1 Derivation of boundaries for mechanical criteria in Table 2.75 Table F.2 Derivation of boundaries for i
33、ngress protection criteria in Table 2.75 Table F.3 Derivation of boundaries for climatic criteria in Table 2 76 Table F.4 Derivation of boundaries for chemical criteria in Table 2 77 Table F.5 Derivation of boundaries for electromagnetic criteria in Table 279 Table F.6 Guidance for the classificatio
34、n of electromagnetic environments 81 Table F.7 Coupling mechanisms for common noise sources.82 24702 ISO/IEC:2006(E) 7 INFORMATION TECHNOLOGY GENERIC CABLING INDUSTRIAL PREMISES FOREWORD 1) ISO (International Organization for Standardization) and IEC (International Electrotechnical Commission) form
35、the specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the development of International Standards. Their preparation is entrusted to technical committees; any ISO and IEC member body interested in the subject dealt with may participate in
36、this preparatory work. International governmental and non-governmental organizations liaising with ISO and IEC also participate in this preparation. 2) In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. Draft International Standards adopt
37、ed by the joint technical committee are circulated to national bodies for voting. Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote. 3) The formal decisions or agreements of IEC and ISO on technical matters express, as nearly as possibl
38、e, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC and ISO member bodies. 4) IEC, ISO and ISO/IEC Publications have the form of recommendations for international use and are accepted by IEC and ISO member bodies
39、 in that sense. While all reasonable efforts are made to ensure that the technical content of IEC, ISO and ISO/IEC Publications is accurate, IEC or ISO cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 5) In order to promote international uni
40、formity, IEC and ISO member bodies undertake to apply IEC, ISO and ISO/IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any ISO/IEC Publication and the corresponding national or regional publication should be clearly in
41、dicated in the latter. 6) ISO and IEC provide no marking procedure to indicate their approval and cannot be rendered responsible for any equipment declared to be in conformity with an ISO/IEC Publication. 7) All users should ensure that they have the latest edition of this publication. 8) No liabili
42、ty shall attach to IEC or ISO or its directors, employees, servants or agents including individual experts and members of their technical committees and IEC or ISO member bodies for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for cost
43、s (including legal fees) and expenses arising out of the publication of, use of, or reliance upon, this ISO/IEC publication or any other IEC, ISO or ISO/IEC publications. 9) Attention is drawn to the normative references cited in this publication. Use of the referenced publications is indispensable
44、for the correct application of this publication. 10) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights. International Standard ISO
45、/IEC 24702 was prepared by subcommittee 25: Interconnection of information technology equipment, of ISO/IEC joint technical committee 1: Information technology. ISO/IEC 24702 should be read in conjunction with International Standard ISO/IEC 11801. This International Standard has been approved by vot
46、e of the member bodies, and the voting results may be obtained from the address given on the title page. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. 8 24702 ISO/IEC:2006(E) INTRODUCTION Within premises, the importance of the information technology cabling inf
47、rastructure is similar to that of other fundamental building utilities such as heating, lighting and mains power. As with other utilities, interruptions to service can have serious impact. Poor quality of service due to lack of design foresight, use of inappropriate components, incorrect installatio
48、n, poor administration or inadequate support can threaten an organizations effectiveness. Historically, the cabling within premises comprised both application-specific and multipurpose networks. The subsequent growth of generic cabling designed in accordance with ISO/IEC 11801 has supported the deve
49、lopment of high-data-rate applications based upon a defined cabling model. This International Standard recognizes the benefit of generic cabling to interconnect several pieces of apparatus within industrial premises or industrial areas within other types of premises (within and between structures and buildings) and should be read in conjunction with ISO/IEC 11801. This International Standard provides, for industrial premi
