Particular safety requirements for equipment to be connected to information and communication networks

IEC 62949:2017 applies to the interface of equipment designed and intended to be connected as a communication terminal to an information and communication technology (ICT) network termination. This document does not apply to: - equipment covered by IEC 62368-1; or - interfaces to other networks. This document specifies the safety requirements of the interface to the ICT network only. Requirements additional to those specified in this document may be necessary for equipment intended for operation while exposed, for example, to extremes of temperature, to excessive dust, moisture, or vibration, to flammable gases, to corrosive or explosive atmospheres and electro medical applications with physical connections to the patient. The following requirements are not covered by this document: - functional safety of equipment; - functional reliability of equipment; - communication facilities with remote supply using hazardous voltage; - protection of equipment connected to ICT networks from functional damage. Key words: Audio/video, Communication Terminal. ICT Network, External Circuits

Besondere Sicherheitsanforderungen an Geräte zum Anschluss an Kommunikationsnetze mit paarweise angeordneten Leitern

Exigences de sécurité spécifiques pour les équipements destinés à être connectés aux réseaux d’information et de communication

IEC 62949:2017 s’applique à l’interface de l’équipement conçu et prévu pour être connecté en tant que terminal de communication à une terminaison de réseau des technologies de l’information et de la communication (TIC). Le présent document ne s’applique pas: - aux équipements couverts par l’IEC 62368-1; et - aux interfaces connectées à d’autres réseaux. Le présent document spécifie les exigences de sécurité de l’interface au réseau des TIC. Des exigences venant s’ajouter à celles spécifiées dans le présent document peuvent être nécessaires pour les équipements destinés à fonctionner en étant exposés, par exemple, à des températures extrêmes, à une poussière, une humidité ou une vibration excessive, à des gaz inflammables ou à des atmosphères corrosives ou explosives, les applications électromédicales connectées physiquement au patient. Les exigences suivantes ne sont pas couvertes par le présent document: - la sécurité fonctionnelle des équipements; - la fiabilité fonctionnelle des équipements; - les installations de communications avec une alimentation à distance utilisant une tension dangereuse; - la protection des équipements connectés aux réseaux des TIC contre les dommages fonctionnels. Mots clés: audio/vidéo, terminal de communication, réseau des TIC, circuits externes

Posebne varnostne zahteve za opremo za priključitev na informacijska in komunikacijska omrežja (IEC 62949:2017)

Ta dokument se uporablja za vmesnik opreme, ki je zasnovan in namenjen priključitvi kot komunikacijski terminal na zaključitev omrežja informacijske in komunikacijske tehnologije (ICT).
Ta dokument se ne uporablja za:
– opremo, obravnavano v standardu IEC 62368-1; in
– vmesnike za druga omrežja.
OPOMBA 1: Primer »drugih omrežij« je namensko omrežje stanovanjskih in stavbnih elektronskih sistemov/sistemov za avtomatizacijo in krmiljenje stavb HBES/BACS, ki je zajeto v standardu EN 50491-3.
Ta dokument določa varnostne zahteve za vmesnik samo za omrežje ICT.
OPOMBA 2: Glej dodatek D.
Dodatne zahteve, ki veljajo poleg zahtev, določenih v tem dokumentu, bodo morda potrebne za:
• opremo, namenjeno za uporabo, ko je na primer izpostavljena ekstremnim temperaturam, prekomernemu prahu, vlažnosti ali vibracijam, vnetljivim plinom, korozivnim ali eksplozivnim atmosferam;
• elektromedicinsko opremo, ki je fizično priključena na bolnika.
Ta dokument ne zajema naslednjih zahtev:
• funkcionalna varnost opreme;
• funkcionalna zanesljivost opreme;
• komunikacijske naprave z oddaljenim napajanjem z nevarno napetostjo;
• zaščita opreme, priključene na omrežja ICT, pred funkcijskimi poškodbami.

General Information

Status
Published
Publication Date
08-Jun-2017
Current Stage
6060 - Document made available
Due Date
09-Jun-2017
Completion Date
09-Jun-2017

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Besondere Sicherheitsanforderungen an Geräte zum Anschluss an Kommunikationsnetze mit paarweise angeordneten Leitern (IEC 62949:2017)Exigences particulières de sécurité pour les équipements destinés à être connectés aux réseaux d'information et de communication

(IEC 62949:2017)Particular safety requirements for equipment to be connected to information and communication networks

(IEC 62949:2017)35.020Informacijska tehnika in tehnologija na splošnoInformation technology (IT) in general33.050.01Telekomunikacijska terminalska oprema na splošnoTelecommunication terminal equipment in generalICS:Ta slovenski standard je istoveten z:EN 62949:2017SIST EN 62949:2017en01-december-2017SIST EN 62949:2017SLOVENSKI

STANDARDSIST EN 41003:20091DGRPHãþD
SIST EN 62949:2017
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 62949
June 2017 ICS 33.160; 35.020
Supersedes
EN 41003:2008
English Version

Particular safety requirements for equipment to be connected to information and communication networks (IEC 62949:2017)

Exigences de sécurité spécifiques pour les équipements destinés à être connectés aux réseaux d'information et de communication (IEC 62949:2017)

Besondere Sicherheitsanforderungen an Geräte zum Anschluss an Kommunikationsnetze mit paarweise angeordneten Leitern (IEC 62949:2017) This European Standard was approved by CENELEC on 2017-02-24. 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 obtained 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 to 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, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization

Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17,

B-1000 Brussels © 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN 62949:2017 E SIST EN 62949:2017

EN 62949:2017 2 European foreword The text of document 108/664/FDIS, future edition 1 of IEC 62949, prepared by IEC/TC 108 "Safety of electronic equipment within the field of audio/video, information technology and communication technology" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 62949:2017. The following dates are fixed: • latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2017-12-09 • latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2019-06-20

This document supersedes EN 41003:2008. Attention is drawn to the possibility that some of the 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. This document has been prepared under a mandate given to CENELEC by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For the relationship with EU Directive(s) see informative Anne• ZZ, which is an integral part of this document. Endorsement notice The text of the International Standard IEC 62949:2017 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards indicated: IEC 60065:2014 NOTE Harmonized as EN 60065:2014 (modified). IEC 60364 NOTE Harmonized in HD 384 / HD 60364 series. IEC 60529 NOTE Harmonized as EN 60529. IEC 60664-1 NOTE Harmonized as EN 60664-1. IEC 60950-1:2005 NOTE Harmonized as EN 60950-1:2006 (modified). SIST EN 62949:2017

EN 62949:2017 3 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 application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here: www.cenelec.eu.

Publication Year Title EN/HD Year IEC 62368-1 (mod) 2014
Audio/video, information and communication technology equipment - Part 1:
Safety requirements EN 62368-1 2014
- -
+ AC 2015-05 - -
+AC 2017-03 - -
+ A11 2017
SIST EN 62949:2017
EN 62949:2017 4 Annex ZZ (informative)

Relationship between this European Standard and the safety objectives of Directive 2014/35/EU [2014 OJ L96] aimed to be covered This European Standard has been prepared under a Commission’s standardization request relating to harmonized standards in the field of the Low Voltage Directive, M/511, to provide one voluntary means of conforming to safety objectives of Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonization of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits [2014 OJ L96]. Once this standard is cited in the Official Journal of the European Union under that Directive, compliance with the normative clauses of this standard given in Table ZZ.1 confers, within the limits of the scope of this standard, a presumption of conformity with the corresponding safety objectives of that Directive, and associated EFTA regulations. Table ZZ.1 – Correspondence between this European Standard and Annex I of Directive 2014/35/EU [2014 OJ L96] Safety objectives of Directive 2014/35/EU Clause(s) / sub-clause(s) of this EN Remarks / Notes Annex I 1. General conditions This standard is an interface standard, only. It addresses the electrical characteristic of the electric interface to an ICT network. See Clause 1

2. Protection against hazards arising from the electrical equipment See 4.1 up to 4.5 and 4.7

a) protected against the danger of physical injury or other harm which might be caused by direct or indirect contact; See 4.2. – 4.5.

See 4.7

b) temperatures, arcs or radiation which would cause a danger, are not produced; Not addressed in this standard

c) protected against non-electrical dangers caused by the electrical equipment which are revealed by experience; Not addressed in this standard

d) the insulation is suitable for foreseeable conditions. See 4.2. – 4.5.3
SIST EN 62949:2017

EN 62949:2017 5 Safety objectives of Directive 2014/35/EU Clause(s) / sub-clause(s) of this EN Remarks / Notes 3. Protection against hazards which may be caused by external influences on the electrical equipment See 4.5.4; 4.6 and 4.7

a) meets the expected mechanical requirements in such a way that persons, domestic animals and property are not endangered; Not addressed in this standard

b) is resistant to non-mechanical influences in expected environmental conditions, in such a way that persons, domestic animals and property are not endangered

See 4.5.4
See 4.6

c) does not endanger persons, domestic animals and property in foreseeable conditions of overload See 4.7

WARNING 1: Presumption of conformity stays valid only as long as a reference to this European standard is maintained in the list published in the Official Journal of the European Union. Users of this standard should consult frequently the latest list published in the Official Journal of the European Union. WARNING 2: Other Union legislation may be applicable to the product(s) falling within the scope of this standard. SIST EN 62949:2017

SIST EN 62949:2017

IEC 62949 Edition 1.0 2017-01 INTERNATIONAL STANDARD NORME INTERNATIONALE Particular safety requirements for equipment to be connected to information

and communication networks

Exigences de sécurité spécifiques pour les équipements destinés à être connectés aux réseaux d’information et de communication

INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE

ICS 33.160; 35.020
ISBN 978-2-8322-3790-8
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale ®

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé. SIST EN 62949:2017 colourinside

– 2 – IEC 62949:2017 © IEC 2017 CONTENTS FOREWORD ........................................................................................................................... 4 INTRODUCTION ..................................................................................................................... 6 1 Scope .............................................................................................................................. 7 2 Normative references ...................................................................................................... 7 3 Terms and definitions ...................................................................................................... 7 4 Safety requirements and compliance criteria.................................................................... 8 4.1 General ................................................................................................................... 8 4.2 Interconnection of equipment .................................................................................. 9 4.2.1 General requirements ...................................................................................... 9 4.2.2 Types of interconnection circuits ...................................................................... 9 4.3 ES1 circuits ............................................................................................................ 9 4.3.1 Limits .............................................................................................................. 9 4.3.2 Protection against contact with ES1 circuits ..................................................... 9 4.4 ES2 circuits ............................................................................................................ 9 4.4.1 Limits .............................................................................................................. 9 4.4.2 Protection against contact with ES2 circuits ..................................................... 9 4.5 ES3 circuits ............................................................................................................ 9 4.5.1 Limits .............................................................................................................. 9 4.5.2 Protection against contact with ES3 circuits ..................................................... 9 4.6 Protection from hazards in the equipment for persons servicing ICT networks, and users of other equipment connected to the network ........................................ 10 4.6.1 Protection from ES3....................................................................................... 10 4.6.2 Separation of the ICT network from earth ...................................................... 10 4.6.3 Touch current to ICT networks ....................................................................... 10 4.6.4 Summation of touch currents from ICT networks ............................................ 10 4.7 Protection of equipment users from overvoltages on ICT networks ........................ 10 4.8 Protection of the wiring system of an ICT network from overheating ...................... 10 Annex A (informative)

Relevant safety standards for the application of this document .......... 11 Annex B (informative)

ICT network voltages and signals ...................................................... 12 B.1 General ................................................................................................................. 12 B.2 Contact with operating voltages on ICT networks .................................................. 13 Annex C (informative)

Comparison of terms and definitions introduced in this document .............................................................................................................................. 15 C.1 General ................................................................................................................. 15 C.2 Comparison of terms and definitions ..................................................................... 15 Annex D (informative)

Overview of networks ........................................................................ 22 Bibliography .......................................................................................................................... 23

Figure B.1 – Current limit curves ........................................................................................... 13 Figure D.1 – Overview of network ......................................................................................... 22

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IEC 62949:2017 © IEC 2017 – 3 –

Table C.1 – Comparison of terms and definitions in IEC 60950-1:2005 and IEC 62368-1:2014 ................................................................................................................. 16 Table C.2 – Comparison of terms and definitions in IEC 62151:2000 and IEC 62368-1:2014 .................................................................................................................................. 19

SIST EN 62949:2017

– 4 – IEC 62949:2017 © IEC 2017 INTERNATIONAL ELECTROTECHNICAL COMMISSION ____________

PARTICULAR SAFETY REQUIREMENTS FOR EQUIPMENT TO BE CONNECTED TO INFORMATION AND COMMUNICATION 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 questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested 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 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 IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for 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 any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications.

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 of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 62949 has been prepared by IEC technical committee 108: Safety of electronic equipment within the field of audio/video, information technology and communication technology. The text of this standard is based on the following documents: FDIS Report on voting 108/664/FDIS 108/676/RVD

Full information on the voting for the approval of this International Standard can be found in the report on voting indicated in the above table. This document has been drafted in accordance with the ISO/IEC Directives, Part 2. In this standard, the following print types are used: • requirements proper and normative annexes: in roman type; SIST EN 62949:2017

IEC 62949:2017 © IEC 2017 – 5 –

• compliance statements and test specifications: in italic type; • notes and other informative matter: in smaller roman type; • normative conditions within tables: in smaller roman type; • Terms that are defined in Clause 3: bold. The committee has decided that the contents of this document will remain unchanged until the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to the specific document. At this date, the document will be

• reconfirmed, • withdrawn, • replaced by a revised edition, or • amended.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates that it contains colours which are considered to be useful for the correct understanding of its contents. Users should therefore print this document using a colour printer.

SIST EN 62949:2017

– 6 – IEC 62949:2017 © IEC 2017 INTRODUCTION This document is applicable for products intended to be connected as communication terminal to an ICT network not covered by the scope of IEC 62368-1. It is to be used in conjunction with other product safety standards, examples of which are listed in Annex A. This document, in accordance with the 'principles of safety' given in the introduction of IEC 62368-1, covers the requirements and compliance criteria under three headings. • Protection of equipment users from hazards in the equipment. The users are considered to be protected from hazards in the equipment if the equipment complies with a relevant safety standard, for example one of those listed in Annex A, but compliance with those standards is not part of this document. NOTE An equipment user could be an ordinary person or an instructed person. • Protection of skilled persons or instructed persons working on an ICT network and other users of an ICT network, from hazardous conditions on an ICT network resulting from the connection of the equipment. • Protection of equipment users from voltages on an ICT network. Upper limits for ICT networks signals have been defined. They include also telephone ringing signals which have been defined taking into account voltages commonly used in the different networks. The electrical hazard criteria have been chosen to be in accordance with IEC TS 60479 (all parts). Test levels used for the equipment take account of the possibility that overvoltages may occur on ICT networks. Special consideration has been given to equipment parts expected to be held or touched during normal use, e.g. telephone handsets. It is recognised that in high overvoltages risk areas, requirements of this document may not be sufficient. Additional protective devices, not covered by this document, may be installed in the ICT networks to better meet extreme conditions. A comparison of terms introduced in this document with existing IEC standards is given in Annex C.

SIST EN 62949:2017
IEC 62949:2017 © IEC 2017 – 7 –

PARTICULAR SAFETY REQUIREMENTS FOR EQUIPMENT TO BE CONNECTED TO INFORMATION AND COMMUNICATION NETWORKS

1 Scope This document applies to the interface of equipment designed and intended to be connected as a communication terminal to an information and communication technology (ICT) network termination. This document does not apply to: • equipment covered by IEC 62368-1; and • interfaces to other networks. NOTE 1 An example of ‘other networks’ is a dedicated Home and Building Electronic Systems/Building Automation and Control Systems HBES/BACS network covered by EN 50491-3. This document specifies the safety requirements of the interface to the ICT network only. NOTE 2 See Annex D. Requirements additional to those specified in this document may be necessary for • equipment intended for operation while exposed, for example, to extremes of temperature, to excessive dust, moisture, or vibration, to flammable gases, to corrosive or explosive atmospheres, • electro medical applications with physical connections to the patient. The following requirements are not covered by this document: • functional safety of equipment; • functional reliability of equipment; • communication facilities with remote supply using hazardous voltage; • protection of equipment connected to ICT networks from functional damage. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements 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. NOTE Lists of other related documents can be found in Annex A and in the Bibliography. IEC 62368-1:2014, Audio/video, information and communication technology equipment – Part 1: Safety requirements 3 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 62368-1and the following apply. SIST EN 62949:2017

– 8 – IEC 62949:2017 © IEC 2017 ISO and IEC maintain terminological databases for use in standardization at the following addresses: • IEC Electropedia: available at http://www.electropedia.org/ • ISO Online browsing platform: available at http://www.iso.org/obp NOTE Defined terms are printed in bold. 3.1

information and communication technology network ICT network metallically terminated transmission medium consisting of paired conductors 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 communication transmission medium; • a dedicated HBES/BACS networks; • external circuits operating at ES1 levels connecting units of audio/video, information and communication technology equipment Note 1 to entry: This network may include twisted pairs, and may include circuits, which are subjected to transients as indicated in Table 14 of IEC 62368-1:2014, ID1 (assumed to be 1,5 kV). Note 2 to entry: An ICT network may be: • public or privately owned; • subject to longitudinal (common mode) voltages induced from nearby power lines or electric traction lines. Note 3 to entry: Examples of ICT 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. Note 4 to entry: For information about circuit voltages and signals, which may be present, see Annex B. 3.2

communication terminal equipment connected to an ICT network to provide access to one or more specific information transfer services Note 1 to entry: A communication terminal may be characterized, for example, as a user's communication terminal, a communication terminal providing services, a communication terminal acting as an interface between ICT networks. Note 2 to entry: A communication terminal may have to translate the signals received from or sent to the network according to the service considered. 4 Safety requirements and compliance criteria 4.1 General It is assumed that adequate measures according to ITU-T Recommendation K.11 have been taken to reduce the likelihood that the overvoltages presented to the equipment from the ICT network exceed 1,5 kV peak. In installations where overvoltages presented to the equipment may exceed 1,5 kV peak, additional measures such as surge suppression may be necessary. The general conditions for tests of Annex B of IEC 62368-1:2014 apply, unless specified in the relevant product safety standard. SIST EN 62949:2017

IEC 62949:2017 © IEC 2017 – 9 –

The references to the requirements of 4.4.4.5, 5.4.2.6 and 5.4.3.2 of IEC 62368-1:2014, may be replaced by the corresponding requirements in other relevant safety standards listed in Annex A, if the equipment is designed to comply with one of these standards. 4.2 Interconnection of equipment 4.2.1 General requirements Where an equipment is intended to be electrically connected to another equipment via an ICT network, interconnection circuits shall be selected to provide continued conformance to the requirements of 5.2 of IEC 62368-1:2014 for ES1 or ES2 circuits, after making connections. NOTE This is normally achieved by connecting ES2 circuits to ES2 circuits and ES1circuits to ES1 circuits. 4.2.2 Types of interconnection circuits Interconnection circuits to ICT networks shall be ES1 circuits or ES2 circuits according to 5.2 of IEC 62368-1:2014. 4.3 ES1 circuits 4.3.1 Limits The limits of 5.2.1 of IEC 62368-1:2014 for ES1 apply. 4.3.2 Protection against contact with ES1 circuits There is no protection required for ES1 circuits. 4.4 ES2 circuits 4.4.1 Limits The limits of 5.2.2 of IEC 62368-1:2014 for ES2 apply. 4.4.2 Protection against contact with ES2 circuits For ES2 circuits, the requirements of 5.3.1 and 5.3.2.1 of IEC 62368-1:2014 apply for an ordinary person and an instructed person. For ES2 circuits, the requirements of 5.3.1 of IEC 62368-1:2014 apply for a skilled person. 4.5 ES3 circuits 4.5.1 Limits The limits of 5.2.2 of IEC 62368-1:2014 for ES3 apply. 4.5.2 Protection against contact with ES3 circuits For ES3 circuits, the requirements of 5.3.2.1 of IEC 62368-1:2014 apply for an ordinary person and an instructed person. For ES3 circuits, the requirements of 5.3.1 of IEC 62368-1:2014 apply for a skilled person. SIST EN 62949:2017

– 10 – IEC 62949:2017 © IEC 2017 4.6 Protection from hazards in the equipment for persons servicing ICT networks, and users of other equipment connected to the network 4.6.1 Protection from ES3 Subclause 5.7.6.2 of IEC 62368-1:2014 applies. 4.6.2 Separation of the ICT network from earth Subclause 5.4.11 of IEC 62368-1:2014 applies. 4.6.3 Touch current to ICT networks Subclause 5.7.6.2 of IEC 62368-1:2014 applies. 4.6.4 Summation of touch currents from ICT networks Subclause 5.7.7 of IEC 62368-1:2014 applies. 4.7 Protection of equipment users from overvoltages on ICT networks Subclause 5.4.10 of IEC 62368-1:2014 applies. 4.8 Protection of the wiring system of an ICT network from overheating Subclause 6.5.3 of IEC 62368-1:2014 applies.

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IEC 62949:2017 © IEC 2017 – 11 –
Annex A (informative)

Relevant safety standards for the application of this document This annex lists some examples of IEC product safety standards with which this document may be used. Publication Title IEC 60601-1 (all parts) Medical electrical equipment – Part 1: General requirements for basic safety and essential performance IEC 61010 (all parts) Safety requirements for electrical equipment for measurement, control, and laboratory use IEC 62504:2014 General lighting – Light emitting diode (LED) products and related equipment – Terms and definitions

SIST EN 62949:2017
– 12 – IEC 62949:2017 © IEC 2017 Annex B (informative)

ICT network voltages and signals B.1 General Certain voltages within ICT networks often exceed the steady state, safe to touch limits set within general safety standards. NOTE Years of practical experience by world-wide network operators have found ringing and other operating voltages to be electrically safe. Records of accident statistics indicate that electrical injuries are not caused by operating voltages. Access to connectors carrying such signals with the standard test finger is permitted, provided that

...

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