IEC_61508-5_-_.pdf

Functional safety of electrical/electronic/programmable electronic safety-related systems Part 5:Example of methods for the determination of safety integrity levels The European Standard EN 61508-5:2001 has the status ofa British Standard ICs 25.040.40;29.020 BS EN 6 1 508-5 12002 Incorporating Amendment No.I to(renumbers the BS IEC as BSIEC 61508-5:1998 BS EN 61508-5:2002)COPYRIGHT 2003;British Standards Institution on ERC Specs and Standards Document provided by IHS Licensee=Agip KOC/5950653001,User=,04/16/200301:15:20 MDT Questions or comments about this message:please call the DocumentPolicy Management Group at 1-800-451-1584.-,-,-BS EN 61 508-512002 15 March 2002 National foreword Implementation of the European Standard and correction of the front cover to remove reference to corrigendum This British Standard,having been prepared under the direction of the Electrotechnical Sector Committee,was published under the authority of the Standards Committee and comes into effect on 15 July 1999 This British Standard is the official English language version of EN 61508-5:2001.It is identical with IEC 61508-5:1999 includingcorrigendum April 1999.The UKparticipation 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:-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.-A list of organizations represented on this committee can be obtained on request to its secretary.Cr oss-r e fer enc e s 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 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.Summary of pages This document comprises a front cover,an inside front cover,the EN title page,the EN foreword page,the IEC title page,pages 2 to 29,the annex ZA page,an inside back cover 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.IDate I Comments 13783 O BSI 15 March 2002 ISBN O 580 32728 O COPYRIGHT 2003;British Standards Institution on ERC Specs and Standards Document provided by IHS Licensee=Agip KOC/5950653001,User=,04/16/200301:15:20 MDT Questions or comments about this message:please call the DocumentPolicy Management Group at 1-800-451-1584.-,-,-EUROPEAN STANDARD EN 61508-5 NORME EUROPENNE EUROPISCHE NORM Decem ber 2001 ICs 25.040.40 English version Fu nct i on a I safety of elect ri cal/el ect ro n i c/p rog ram ma ble electron i c safety-re lated systems Part 5:Examples of methods for the determination of safety integrity levels(IEC 61 508-5:1998+corrigendum 1999)Scurit fonctionnelle des systmes lectr iq u es/lectron iq u es/lectro n iq u es programmables relatifs la scurit Partie 5:Exemples de mthodes de dtermination des niveaux dintgrit de scurit Stufe der Sicherheitsintegritt(CE1 61 508-51 998+corrigendum 1999)Funktionale Sicherheit sicherheitsbezogener elektrischer/ele ktron ischer/program mierbarer elektronischer Systeme Teil 5:Beispiele zur Ermittlung der(safety integrity level)(IEC 61 508-51 998+Corrigendum 1999)This European Standard was approved by CENELEC on 2001-07-03.CENELEC members are bound to comply with the CENKENELEC 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 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 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,Malta,Netherlands,Norway,Portugal,Spain,Sweden,Switzerland and United Kingdom.CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat:rue de Stassart 35,B-1050 Brussels O 2001 CENELEC-All rights of exploitation in any form and by any means