1、 TECHNICAL REPORT IECTR 62102Second edition 2005-05Electrical safety Classification of interfaces for equipment to be connected to information and communications technology networks Reference number IEC/TR 62102:2005(E) Publication numbering As from 1 January 1997 all IEC publications are issued wit
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8、ond edition 2005-05Electrical safety Classification of interfaces for equipment to be connected to information and communications technology networks PRICE CODE IEC 2005 Copyright - all rights reserved No part of this publication may be reproduced or utilized in any form or by any means, electronic
9、or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Electrotechnical Commission, 3, rue de Varemb, PO Box 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 T
10、For price, see current catalogue Commission Electrotechnique Internationale International Electrotechnical Commission 2 TR 62102 IEC:2005(E) CONTENTS FOREWORD.3 INTRODUCTION.5 1 Scope.6 2 Normative references6 3 Terms and definitions .7 3.1 Definitions from IEC 60950-1 .7 3.2 Definitions from IEC 60
11、950-21 .9 3.3 Additional definitions for this document 9 3.4 Abbreviations.10 4 Reference configuration10 5 Safety categories of interfaces provided for connection to an information and communications technology network .13 5.1 SELV circuits.13 5.2 TNV circuits.13 5.3 User information13 5.4 RFT circ
12、uits.13 6 Phenomena affecting the safety of interface ports .13 6.1 Network Environment 014 6.2 Network Environment 114 7 Determination of circuit type15 Annex A (informative) Consideration of interface phenomenon .16 Annex B (informative) Worked examples of certain network interfaces19 Annex C (inf
13、ormative) Conditions for Network Environment 022 Annex D (informative) Voltage ranges of SELV circuits and TNV circuits.23 Bibliography24 TR 62102 IEC:2005(E) 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ELECTRICAL SAFETY CLASSIFICATION OF INTERFACES FOR EQUIPMENT TO BE CONNECTED TO INFORMATION AND
14、 COMMUNICATIONS TECHNOLOGY NETWORKS FOREWORD 1) The International Electrotechnical Commission (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 questio
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23、ublications. 8) Attention is drawn to the Normative references cited in this publication. Use of 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
24、 of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. The main task of IEC technical committees is to prepare International Standards. However, a technical committee may propose the publication of a technical report when it has collected data of a differ
25、ent kind from that which is normally published as an International Standard, for example “state of the art“. IEC 62102, which is a technical report, was prepared by IEC technical committee 108: Safety of electronic equipment within the field of audio/video, information technology and communication t
26、echnology, previously organized as IEC technical committee 74: Safety and energy efficiency of IT equipment. This second edition cancels and replaces the first edition published in 2001. This edition constitutes a technical revision. The principal changes in this edition as compared with the first e
27、dition of IEC 62102 are as follows (small changes are not listed): this 2nd edition was updated to accord with IEC 60950-1:2001; RFT (remote feeding telecommunication) circuits from IEC 60950-21 have been added; 4 TR 62102 IEC:2005(E) in Annex B more interfaces have been added; in Annex B the catego
28、ry of xDSL interfaces have replaced ADSL interfaces. The text of this technical report is based on the following documents: Enquiry draft Report on voting 108/128/DTR 108/130/RVC Full information on the voting for the approval of this technical report can be found in the report on voting indicated i
29、n the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. Terms printed in bold in the text are defined in Clause 3. The committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicated on the
30、IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. A bilingual version of this document may be published at a later date. TR 62102 IEC:2005(E) 5 INTRODUCT
31、ION This technical report is a guide to the determination of the interface requirements for equipment in terms of safety. It lists a number of interfaces and indicates the safety category of each listed interface. This technical report does not contain sufficient detail for conformance testing purpo
32、ses, except when used in conjunction with product standards such as IEC 60950-1 and IEC 60950-21. The equipment safety standards IEC 60950-1 and IEC 60950-21 specify the requirements for categories of circuits as SELV circuits, TNV circuits, RFT circuits and hazardous voltage circuits (among others)
33、. For stand-alone equipment it is a relatively simple matter to determine the different categories of circuits. However, an equipment which has data port interfaces is intended to be connected to other equipment, either locally or via a network. In this case, the safety categories of the interfaces
34、which will be connected together have to be compatible with each other. Furthermore, the category of the interface of the remote equipment may be unknown. This is the case in systems where telecommunication equipment and data processing equipment are connected together via different types of interfa
35、ces and networks. To overcome this situation it is necessary to classify the interfaces of equipment in such configurations according to the application and to select the safety category for the interfaces of the equipment and for the type of the network. Similarly, the interfaces have to be classif
36、ied for protection against damage of the equipment and of the network. Aspects of protection are dealt with in the ITU-T K series of recommendations. 6 TR 62102 IEC:2005(E) ELECTRICAL SAFETY CLASSIFICATION OF INTERFACES FOR EQUIPMENT TO BE CONNECTED TO INFORMATION AND COMMUNICATIONS TECHNOLOGY NETWO
37、RKS 1 Scope This technical report applies to equipment interfaces. These interfaces within the equipment may be connected to telecommunication networks, may form part of the telecommunication network infrastructure or may provide localized transfer of data. This technical report provides guidance on
38、 the classification of interfaces in accordance with the circuit types defined in IEC 60950-1 and IEC 60950-21 following an analysis of the telecommunication network characteristics. This technical report only covers equipment appropriately interconnected. Furthermore, it does not address damage cau
39、sed by one equipment to another equipment to which it is connected. Exceptionally, interfaces may be designed for higher or lower levels for special applications. In such cases it should be ensured that only interfaces having the same safety category and protection level are connected together. This
40、 is based on the available specifications of the equipment manufacturers and network providers, and on information regarding the installation category of the mains interface. This technical report is intended to be used by equipment designers, network operators, network regulators/authorities, stand
41、ards writers and network installers. It is applicable to various interfaces of equipment. Network presentations are not equipment and so are not covered by IEC 60950-1 and IEC 60950-21; hence they are also not covered by this technical report. However, it is necessary to consider the characteristics
42、, installation and presentation of telecommunication networks when determining what equipment interface requirements apply (for example, SELV circuit, TNV-1 circuit, TNV-2 circuit, TNV-3 circuit etc.). If a standard other than IEC 60950-1 or IEC 60950-21 is used for designing the equipment and its i
43、nterface (for example, IEC 62151 in conjunction with other product safety standards), then the corresponding requirements of these other standards are to be preferred. If there is a conflict between this technical report and a more detailed specification, the latter prevails. This technical report a
44、pplies regardless of ownership or responsibility for installation and maintenance of the equipment or network. NOTE Terminal equipment is often connected to customer premises cabling when used in a business environment, and there are standards covering such cabling. 2 Normative references The follow
45、ing referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60950-1:2001, Information technology equipment Safety P
46、art 1: General requirements IEC 60950-21:2002, Information technology equipment Safety Part 21: Remote power feeding TR 62102 IEC:2005(E) 7 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 Definitions from IEC 60950-1 3.1.1 a.c. mains supply a
47、.c. power distribution system external to the equipment for supplying power to a.c. powered equipment. These power sources include public or private utilities and, unless otherwise specified in the standard, equivalent sources such as motor-driven generators and uninterruptible power supplies IEC 60
48、950-1, definition 1.2.8.1 3.1.2 hazardous voltage voltage exceeding 42,4 V peak, or 60 V d.c., existing in a circuit which does not meet the requirements for either a limited current circuit or a TNV circuit IEC 60950-1, definition 1.2.8.5 3.1.3 limited current circuit circuit which is so designed a
49、nd protected that, under both normal operating conditions and single fault conditions, the current which can be drawn is not hazardous IEC 60950-1, definition 1.2.8.8 3.1.4 primary circuit circuit which is directly connected to the a.c. mains supply. It includes, for example, the means for connection to the a.c. mains supply, the primary windings of transformers, motors and other loading devices IEC 60950-1, definition 1.2.8.3 3.1.5 secondary
