IEC_62061_2005-En-Only.pdf

NORMEINTERNATIONALECEIIECINTERNATIONALSTANDARD62061Premire ditionFirst edition2005-01Scurit des machines Scurit fonctionnelle des systmes de commandelectriques,lectroniques et lectroniques programmables relatifs la scurit Safety of machinery Functional safety of safety-related electrical,electronic and programmable electronic control systems Numro de rfrence Reference number CEI/IEC 62061:2005 Customer:Brian Benvenuti-No.of User(s):5 international-Company:GE Power SystemsOrder No.:-IMPORTANT:This file is copyright of IEC,Geneva,Switzerland.All rights reserved.This file is subject to a licence agreement.Enquiries to Email:custserviec.ch-Tel.:+41 22 919 02 11NORMEINTERNATIONALECEIIECINTERNATIONALSTANDARD62061Premire ditionFirst edition2005-01Scurit des machines Scurit fonctionnelle des systmes de commandelectriques,lectroniques et lectroniques programmables relatifs la scurit Safety of machinery Functional safety of safety-related electrical,electronic and programmable electronic control systems Pour prix,voir catalogue en vigueur For price,see current catalogue IEC 2005 Droits de reproduction rservs Copyright-all rights reservedAucune partie de cette publication ne peut tre reproduite ni utilise sous quelque forme que ce soit et par aucun procd,lectronique ou mcanique,y compris la photocopie et les microfilms,sans laccord crit de lditeur.No part of this publication may be reproduced or utilized in any form or by any means,electronic 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,SwitzerlandTelephone:+41 22 919 02 11 Telefax:+41 22 919 03 00 E-mail:inmailiec.ch Web:www.iec.ch CODE PRIX PRICE CODE XDCommission Electrotechnique InternationaleInternational Electrotechnical Commission?Customer:Brian Benvenuti-No.of User(s):5 international-Company:GE Power SystemsOrder No.:-IMPORTANT:This file is copyright of IEC,Geneva,Switzerland.All rights reserved.This file is subject to a licence agreement.Enquiries to Email:custserviec.ch-Tel.:+41 22 919 02 1162061 IEC:2005 3 CONTENTSFOREWORD.9INTRODUCTION.131Scope and object.192Normative references.213Terms,definitions and abbreviations.233.1Alphabetical list of definitions.233.2Terms and definitions.273.3Abbreviations.434Management of functional safety.454.1Objective.454.2Requirements.455Requirements for the specification of Safety-Related Control Functions(SRCFs).475.1Objective.475.2Specification of requirements for SRCFs.476Design and integration of the safety-related electrical control system(SRECS).536.1Objective.536.2General requirements.536.3Requirements for behaviour(of the SRECS)on detection of a fault in the SRECS.556.4Requirements for systematic safety integrity of the SRECS.576.5Selection of safety-related electrical control system.616.6Safety-related electrical control system(SRECS)design and development.616.7Realisation of subsystems.716.8Realisation of diagnostic functions.1036.9Hardware implementation of the SRECS.1056.10 Software safety requirements specification.1056.11 Software design and development.1076.12 Safety-related electrical control system integration and testing.1236.13 SRECS installation.1257Information for use of the SRECS.1257.1Objective.1257.2Documentation for installation,use and maintenance.1258Validation of the safety-related electrical control system.1278.1General requirements.1298.2Validation of SRECS systematic safety integrity.1299Modification.1319.1Objective.1319.2Modification procedure.1319.3Configuration management procedures.13310Documentation.137Customer:Brian Benvenuti-No.of User(s):5 international-Company:GE Power SystemsOrder No.:-IMPORTANT:This file is copyright of IEC,Geneva,Switzerland.All rights reserved.This file is subject to a licence agreement.Enquiries to Email:custserviec.ch-Tel.:+41 22 919 02 1162061 IEC:2005 5 Annex A(informative)SIL assignment.141Annex B(informative)Example of safety-related electrical control system(SRECS)design using concepts and requirements of Clauses 5 and 6.157Annex C(informative)Guide to embedded software design and development.171Annex D(informative)Failure modes of electrical/electronic components.189Annex E(informative)Electromagnetic(EM)phenomenon and increased immunity levels for SRECS intended for use in an industrial environment according to IEC 61000-6-2.199Annex F(informative)Methodology for the estimation of susceptibility to common cause failures(CCF).203Figure 1 Relationship of IEC 62061 to other relevant standards.15Figure 2 Workflow of the SRECS design and development process.65Figure 3 Allocation of safety requirements of the function blocks to subsystems(see 6.6.2.1.1).67Figure 4 Workflow for subsystem design and development(see box 6B of Figure 2).77Figure 5 Decomposition of function blocks to function block elements and their associated subsystem elements.79Figure 6 Subsystem A logical representation.91Figure 7 Subsystem B logical repr