1、PUBLISHED DOCUMENTPD CLC/TR 62102:2006Electrical safety Classification of interfaces for equipment to be connected to information and communications technology networksICS 35.020; 29.020g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g5
2、5g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58PD CLC/TR 62102:2006This Published Document was published under the authority of the Standards Policy and Strategy Committee on 31 May 2006 BSI 2006ISBN 0 580 48408 4National forewordThis Published Document is the
3、official English language version of CLC/TR 62102:2006.The UK participation in its preparation was entrusted to Technical Committee EPL/108, Safety of electronic equipment within the field of audio/video, information technology and communication technology, which has the responsibility to: A list of
4、 organizations represented on this committee can be obtained on request to its secretary.Cross-referencesThe British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Cor
5、respondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a Published Document does n
6、ot of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments
7、 and promulgate them in the UK.Summary of pagesThis document comprises a front cover, an inside front cover, the CLC/TR title page, the CLC/TR forward page, the IEC/TR title page, pages 2 to 24, an inside back cover and a back cover.The BSI copyright notice displayed in this document indicates when
8、the document was last issued.Amendments issued since publicationAmd. No. Date CommentsTECHNICAL REPORT CLC/TR 62102 RAPPORT TECHNIQUE TECHNISCHER BERICHT April 2006 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr
9、Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. CLC/TR 62102:2006 E ICS 35.020; 29.020 Supersedes CLC/TR 62102:2005English version Electrical s
10、afety Classification of interfaces for equipment to be connected to information and communications technology networks (IEC/TR 62102:2005 ) Scurit lectrique Classification des interfaces pour les matriels destins tre connects des rseaux de traitement de linformation et de communication (CEI/TR 62102
11、:2005 ) Elektrische Sicherheit Klassifizierung der Schnittstellen fr den Anschluss von Gerten an Informations- und Kommunikationsnetze (IEC/TR 62102:2005 ) This Technical Report was approved by CENELEC on 2005-10-08. CENELEC members are the national electrotechnical committees of Austria, Belgium, C
12、yprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Foreword The text of the T
13、echnical Report IEC/TR 62102:2005, prepared by IEC TC 108, Safety of electronic equipment within the field of audio/video, information technology and communication technology, was submitted to the formal vote and was approved by CENELEC as CLC/TR 62102 on 2005-10-08. Annex ZA has been added by CENEL
14、EC. _ Endorsement notice The text of the Technical Report IEC/TR 62102:2005 was approved by CENELEC as a Technical Report without any modification. _ CLC/TR 62102:2006TECHNICAL REPORT IECTR 62102Second edition2005-05Electrical safety Classification of interfaces for equipment to be connected to info
15、rmation and communications technology networks Reference number IEC/TR 62102:2005(E) CLC/TR 62102:2006CONTENTS INTRODUCTION 3 1 Scope 4 2 Normative references .4 3 Terms and definitions .5 3.1 Definitions from IEC 60950-1.5 3.2 Definitions from IEC 60950-21 .7 3.3 Additional definitions for this doc
16、ument7 3.4 Abbreviations 8 4 Reference configuration .8 5 Safety categories of interfaces provided for connection to an information and communications technology network.11 5.1 SELV circuits.11 5.2 TNV circuits 11 5.3 User information11 5.4 RFT circuits.11 6 Phenomena affecting the safety of interfa
17、ce ports.11 6.1 Network Environment 012 6.2 Network Environment 112 7 Determination of circuit type .13 Annex A (informative) Consideration of interface phenomenon .14 Annex B (informative) Worked examples of certain network interfaces17 Annex C (informative) Conditions for Network Environment 0 .20
18、 Annex D (informative) Voltage ranges of SELV circuits and TNV circuits 21 Annex ZA (informative) Normative references to international publications with their corresponding European publications 24 Bibliography .22 2 CLC/TR 62102:2006INTRODUCTION This technical report is a guide to the determinatio
19、n 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 purposes, except when used in conjunction with product standa
20、rds 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). For stand-alone equipment it is a relatively simple ma
21、tter 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 which will be connected together have to be compatible w
22、ith 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 interfaces and networks. To overcome this situation it is neces
23、sary 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 classified for protection against damage of the equipment and o
24、f the network. Aspects of protection are dealt with in the ITU-T K series of recommendations. 3 CLC/TR 62102:2006ELECTRICAL SAFETY CLASSIFICATION OF INTERFACES FOR EQUIPMENT TO BE CONNECTED TO INFORMATION AND COMMUNICATIONS TECHNOLOGY NETWORKS 1 Scope This technical report applies to equipment inter
25、faces. 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 the classification of interfaces in accordance with the cir
26、cuit 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 caused by one equipment to another equipment to which it is con
27、nected. 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 is based on the available specifications of the equipment m
28、anufacturers 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, standards writers and network installers. It is applicable to var
29、ious 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, installation and presentation of telecommunication network
30、s 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 interface (for example, IEC 62151 in conjunction with other p
31、roduct 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 applies regardless of ownership or responsibility for install
32、ation 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 following referenced documents are indispensable for the applicati
33、on 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 Part 1: General requirements IEC 60950-21:2002, Information t
34、echnology equipment Safety Part 21: Remote power feeding 4 CLC/TR 62102:20063 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.c. power distribution system external to the equipment for supp
35、lying 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 60950-1, definition 1.2.8.1 3.1.2 hazardous voltage voltage exceed
36、ing 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 and protected that, under both normal operating conditions and si
37、ngle 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
38、, motors and other loading devices IEC 60950-1, definition 1.2.8.3 3.1.5 secondary circuit circuit which has no direct connection to a primary circuit and derives its power from a transformer, converter or equivalent isolation device, or from a battery IEC 60950-1, definition 1.2.8.4 3.1.6 SELV circ
39、uit secondary circuit which is so designed and protected that under normal operating conditions and single fault conditions, its voltages do not exceed a safe value IEC 60950-1, definition 1.2.8.7 3.1.7 TNV circuit (including TNV-1 circuit, TNV-2 circuit, TNV-3 circuit) circuit that is in the equipm
40、ent and to which the accessible area of contact is limited and that is so designed and protected that, under normal operating conditions and single fault conditions, the voltages do not exceed specified limit values IEC 60950-1, definition 1.2.8.10 5 CLC/TR 62102:20063.1.8 telecommunication network
41、metallically terminated transmission medium intended for communication between equipment that may be located in separate buildings, excluding: the mains system for supply, transmission and distribution of electrical power, if used as a telecommunication transmission medium; cable distribution system
42、s; SELV circuits connecting units of data processing equipment NOTE 1 The term telecommunication network is defined in terms of its functionality, not its electrical characteristics. A telecommunication network is not itself defined as being either an SELV circuit or a TNV circuit. Only the circuits
43、 in the equipment are so classified. NOTE 2 A telecommunication network may be: publicly or privately owned; subject to transient overvoltages due to atmospheric discharges and faults in power distribution systems; subject to longitudinal (common mode) voltages induced from nearby power lines or ele
44、ctric traction lines. NOTE 3 Examples of telecommunication networks are: a public switched telephone network; a public data network; an Integrated Services Digital Network (ISDN); a private network with electrical interface characteristics similar to the above. IEC 60950-1, definition 1.2.13.8 3.1.9
45、 cable distribution system metallically terminated transmission medium using coaxial cable, mainly intended for transmission of video and/or audio signals between separate buildings or between outdoor antennas and buildings, excluding: the mains system for supply, transmission and distribution of el
46、ectric power, if used as a communication transmission medium; telecommunication networks; SELV circuits connecting units of information technology equipment NOTE 1 Examples of cable distribution systems are: local area cable networks, community antenna television systems and master antenna televisio
47、n systems providing video and audio signal distribution; outdoor antennas including satellite dishes, receiving antennas, and other similar devices. NOTE 2 Cable distribution systems may be subjected to greater transients than telecommunication networks. IEC 60950-1, definition 1.2.13.14 3.1.10 serv
48、ice person person having appropriate technical training and experience necessary to be aware of hazards to which that person may be exposed in performing a task and of measures to minimize the risks to that person or other persons IEC 60950-1, definition 1.2.13.5 3.1.11 user any person, other than a
49、 service person IEC 60950-1, definition 1.2.13.6 6 CLC/TR 62102:20063.2 Definitions from IEC 60950-21 3.2.1 RFT circuit remote feeding telecommunication circuit a secondary circuit within the equipment, intended to supply or receive d.c. power via a telecommunication network at voltages equal to or exceeding the limits for TNV circuits, and on which overvoltages from telecommunication networks are possible IEC 60950-1, definition 3.1 3.2.2 RFT-C circuit an RFT c
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