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1、BRITISH STANDARD BS EN 61508-1:2002 Incorporating Corrigendum No.1 to BS IEC 61508-1:1998 and Amendment No.1 to BS IEC 61508-1:1998 (renumbers the BS IEC as BS EN 61508-1:2002) Functional safety of electrical/electronic/ programmable electronic safety-related systems Part 1: General requirements The
2、 European Standard EN 61508-1:2001 has the status of a British Standard ICS 25.040.40; 29.020 ? Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 09:06:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 61508-1:2002 This British Standard, having been prepared under the direction of the Electro
3、technical Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 June 1999 BSI 15 March 2002 ISBN 0 580 32719 1 National foreword This British Standard is the official English language version of EN 61508-1:2001. It is identical with IEC 61508-1:19
4、98 including corrigendum May 1999. The UK participation in its preparation was entrusted to Technical Committee GEL/65, Measurement and control, to Subcommittee GEL/65/1, System considerations, which has the responsibility to: A list of organizations represented on this committee can be obtained on
5、request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility
6、of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations
7、. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of page
8、s This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 59 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments 10631 Corrigendum No.1 August 19
9、99Incorporation of IEC Corrigendum May 1999 1377915 March 2002Implementation of the European Standard Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 09:06:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARDEN 61508-1 NORME EUROPENNE EUROPISCHE NORMDecember 2001 CENELEC European C
10、ommittee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2001 CENELEC -All rights of exploitation in any form and by any means reserved worldwide for CENEL
11、EC members. Ref. No. EN 61508-1:2001 E ICS 13.110;25.040;29.020;35.240.50 English version Functional safety of electrical/electronic/programmable electronic safety-related systems Part 1: General requirements (IEC 61508-1:1998 + corrigendum 1999) Scurit fonctionnelle des systmes lectriques/lectroniq
12、ues/lectroniques programmables relatifs la scurit Partie 1: Prescriptions gnrales (CEI 61508-1:1998 + corrigendum 1999) Funktionale Sicherheit sicherheitsbezogener elektrischer/ elektronischer/programmierbarer elektronischer Systeme Teil 1: Allgemeine Anforderungen (IEC 61508-1:1998 + Corrigendum 19
13、99) This European Standard was approved by CENELEC on 2001-07-03. 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 bibliographi
14、cal references concerning such national standards may be obtained on application to the Central Secretariat 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
15、CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg,
16、 Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 09:06:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 61508-1:2001- - 2 Foreword The text of the International Standard IEC 61508-1:1998 including its corrige
17、ndum May 1999, prepared by SC 65A, System aspects, of IEC TC 65, Industrial-process measurement and control, was submitted to the Unique Acceptance Procedure and was approved by CENELEC as EN 61508-1 on 2001-07-03 without any modification. The following dates were fixed: latest date by which the EN
18、has to be implemented at national level by publication of an identical national standard or by endorsement(dop) 2002-08-01 latest date by which the national standards conflicting with the EN have to be withdrawn(dow) 2004-08-01 Annexes designated “normative“ are part of the body of the standard. Ann
19、exes designated “informative“ are given for information only. In this standard, annex ZA is normative and annexes A, B and C are informative. Annex ZA has been added by CENELEC. IEC 61508 is a basic safety publication covering the functional safety of electrical, electronic and programmable electron
20、ic safety-related systems. The scope states: “This International Standard covers those aspects to be considered when electrical/electronic/ programmable electronic systems (E/E/PESs) are used to carry out safety functions. A major objective of this standard is to facilitate the development of applic
21、ation sector international standards by the technical committees responsible for the application sector. This will allow all the relevant factors associated with the application, to be fully taken into account and thereby meet the specific needs of the application sector. A dual objective of this st
22、andard is to enable the development of electrical/electronic/programmable electronic (E/E/PE) safety-related systems where application sector international standards may not exist“. The CENELEC Report R0BT-004, ratified by 103 BT (March 2000) accepts that some IEC standards, which today are either p
23、ublished or under development, are sector implementations of IEC 61508. For example: ? IEC 61511, Functional safety - Safety instrumented systems for the process industry sector; ? IEC 62061, Safety of machinery Functional safety of electrical, electronic and programmable electronic control systems;
24、 ? IEC 61513, Nuclear power plants Instrumentation and control for systems important to safety General requirements for systems. The railways sector has also developed a set of European Standards (EN 50126; EN 50128 and prEN 50129). NOTE EN 50126 and EN 50128 were based on earlier drafts of IEC 6150
25、8. prEN 50129 is based on the principles of the latest version of IEC 61508. This list does not preclude other sector implementations of IEC 61508 which could be currently under development or published within IEC or CENELEC. _ 1002:180516 NE Page 2 EN 615081:2001 Licensed Copy: sheffieldun sheffiel
26、dun, na, Thu Nov 09 09:06:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI - 3 -EN 61508-1:2001 Endorsement notice The text of the International Standard IEC 61508-1:1998 including its corrigendum May 1999 was approved by CENELEC as a European Standard without any modification. In the official version,
27、 for Bibliography, the following note has to be added for the standard indicated: IEC 61355:1997NOTE Harmonized as EN 61355:1997 (not modified). _ 1002:180516 NE Page 3 EN 615081:2001 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 09:06:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI -80516899
28、1:CEI 1 3 CONTENTS Page INTRODUCTION 6 Clause 1Scope 8 2Normative references. 11 3Definitions and abbreviations 11 4Conformance to this standard. 12 5Documentation. 12 5.1Objectives. 12 5.2Requirements . 13 6Management of functional safety 14 6.1Objectives. 14 6.2Requirements . 14 7Overall safety li
29、fecycle requirements 16 7.1General. 16 7.2Concept 25 7.3Overall scope definition. 25 7.4Hazard and risk analysis . 26 7.5Overall safety requirements. 28 7.6Safety requirements allocation 29 7.7Overall operation and maintenance planning . 35 7.8Overall safety validation planning 36 7.9Overall install
30、ation and commissioning planning 37 7.10Realisation: E/E/PES. 38 7.11Realisation: other technology 38 7.12Realisation: external risk reduction facilities 38 7.13Overall installation and commissioning 39 7.14Overall safety validation 39 7.15Overall operation, maintenance and repair. 40 7.16Overall mo
31、dification and retrofit. 43 7.17Decommissioning or disposal 45 7.18Verification 46 8Functional safety assessment. 47 8.1Objective 47 8.2Requirements . 47 Page 4 EN 615081:2001 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 09:06:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI -805168991:CEI 1
32、5 Annexes Annex A (informative) Example documentation structure. 50 A.1General 50 A.2Safety lifecycle document structure . 51 A.3Physical document structure . 54 A.4List of documents 56 Annex B (informative) Competence of persons 57 B.1Objective 57 B.2General considerations . 57 Annex C (informative
33、) Bibliography. 58 Tables 1Ollarev safety ilfecyceivrevo :elw 02 2Sfayte rgetniyti slevelrat :f tegruliam esaeruse fro s afayte fcnucolla ,noitot deta EP/E/E na safteyr-detale system eporol ni gnitaw edmdna mo edof eporoitan . 33 3Sfayte rgetniyti slevelrat :f tegruliam esaeruse fro s afayte fcnucol
34、la ,noitot deta s EP/E/E nafayte-rs detaleystme repomed hgih ni gnitaro dna csuounitno medo of eporoitan 33 4miniMmu slevel fo cnednepednifo e sohtc eraryf tuo gnicnus lanoitfayte sassesmtne (evorlla saftey ilfecycahp elses ni 61 ot 21 dna 8 ot 1clusevi (see fiugr2 e) . 94 5miniMmu slevel fo cnednep
35、ednifo e sohtc eraryf tuo gnicnus lanoitfayte sassesmtne (orevas llafeyt filceycsahp el- 9 e cnilsedu sahp llase fo s dna SEP/E/Eoftware safeyt ilfecycels (see fiugres 4 dna 3 ,2) . 94 1.A Exmacod elpmus noitatnetrcutruf ero fniromr noitarevo eht ot detalella safety ilfecycle . 25 2.A Exmacod elpmus
36、 noitatnetrcutruf ero fniromr noitaSEP/E/E eht ot detale safety ilfecycle . 53 3.A Exmacod elpmus noitatnetrcutruf ero fniromr noitas eht ot detalefotwrae safety ilfecycle . 45 Firugse 1Oevrall framework of ihts sadnatrd . 10 2Ollarev safety ilfecycle 71 3ESEP/E/ saftey ilfecycel (in rilaesahp noita
37、se) . 81 4Software saftey ilfecycel (in rilaesahp noitase) 81 5Rnoitaleso pihf evorlla saftey ilfecycdna SEP/E/E ot el software saftey ilfecycels. 91 6Acollfo noita sfayte rriuqemestne s EP/E/E eht otfayte-rs detaleystmes, ehtor etcgolonhy safteyr-detale systems e dnaxetrlan risk rudecnoit faceitili
38、s 32 7Examepo elprnoitas dna mnanetniaca eceitivits medol 24 8Examepo elprdna noita mnanetniace meganamtne medol. 34 9Exampel midoficap noitrocudere medol 54 .A1 Strucutrini gnformod otni noitacumtne stes for user grpuos. 55 2.A Srtcurutifni gnormf noitaor ralc egompxel systmes s dnamwol lla compelx
39、ity sysetms 55 Page 5 EN 615081:2001 61508-1 IEC:1998 5 xennAse ennAx A (informevita) Examod elpcumnoitatne structure. 05 .A1General 05 .A2Saftey ilfecycod elcumtne surtcrute . 51 .A3Physicaod lcumtne surtcrute . 45 .A4Liso tf odcumtnes 65 ennAx B (informaevit) oCmnetepco ef eprsnos 75 .B1Objecvite
40、75 .B2Generla cnosedirnoitas . 75 ennAx C (informaevit) goilbiBrhpay. 58 Tables 1Overall safety lifecycle: overview 20 2Safety integrity levels: target failure measures for a safety function, allocated to an E/E/PE safety-related system operating in low demand mode of operation . 33 3Safety integrit
41、y levels: target failure measures for a safety function, allocated to an E/E/PE safety-related system operating in high demand or continuous mode of operation 33 4Minimum levels of independence of those carrying out functional safety assessment (overall safety lifecycle phases 1 to 8 and 12 to 16 in
42、clusive (see figure 2) . 49 5Minimum levels of independence of those carrying out functional safety assessment (overall safety lifecycle phase 9 - includes all phases of E/E/PES and software safety lifecycles (see figures 2, 3 and 4) . 49 A.1 Example documentation structure for information related t
43、o the overall safety lifecycle . 52 A.2 Example documentation structure for information related to the E/E/PES safety lifecycle . 53 A.3 Example documentation structure for information related to the software safety lifecycle . 54 Figures 1Overall framework of this standard . 10 2Overall safety life
44、cycle 17 3E/E/PES safety lifecycle (in realisation phase) . 18 4Software safety lifecycle (in realisation phase) 18 5Relationship of overall safety lifecycle to E/E/PES and software safety lifecycles. 19 6Allocation of safety requirements to the E/E/PE safety-related systems, other technology safety
45、-related systems and external risk reduction facilities 32 7Example operations and maintenance activities model 42 8Example operation and maintenance management model. 43 9Example modification procedure model 45 A.1 Structuring information into document sets for user groups. 55 A.2 Structuring infor
46、mation for large complex systems and small low complexity systems 55 5 egaP 1002:180516 NE Annex ZA (normative) Normative references to international publications with their corresponding European publications . 59 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 09:06:39 GMT+00:00 2006, Uncon
47、trolled Copy, (c) BSI -805168991:CEI 1 11 INTRODUCTION Systems comprised of electrical and/or electronic components have been used for many years to perform safety functions in most application sectors. Computer-based systems (generically referred to as programmable electronic systems (PESs) are bei
48、ng used in all application sectors to perform non-safety functions and, increasingly, to perform safety functions. If computer system technology is to be effectively and safely exploited, it is essential that those responsible for making decisions have sufficient guidance on the safety aspects on wh
49、ich to make these decisions. This International Standard sets out a generic approach for all safety lifecycle activities for systems comprised of electrical and/or electronic and/or programmable electronic components (electrical/electronic/programmable electronic systems (E/E/PESs) that are used to perform safety functions. This unified approach has been adopted in order that a rational and consistent technical policy be developed for al