IEC IEC61511-1 Edition 2.12017-08 CONSOLIDATED VERSION colour nside Functional safety-Safetyinstrumentedsystems fortheprocess industry sector- Part 1:Framework,definitions,system,hardware and application programming requirements 61511-1:2016-02+AMD1:2017-08CSV(en) THISPUBLICATIONISCOPYRIGHTPROTECTED Copyright2017IEC,Geneva,Switzerland or byany means,electronic ormechanical, including photocopying and microfilm,without permission in writing from either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC your local IEC member National Committee for further information. IEC Central Office Tel.: +41 22 919 02 11 3,rue de Varembe Fax:+41229190300 CH-1211 Geneva 20 [email protected] Switzerland www.iec.ch AbouttheIEC International Standards for all electrical, electronic and related technologies. AboutIECpublications The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the latest edition, a corrigenda or an amendment might have been published. IEc Catalogue -webstore.iec.ch/catalogue Electropedia-www.electropedia.org The stand-alone application for consulting theentire The world's leading online dictionary of electronic and bibliographicalinfomationonIECInternationalStandards, electrical terms containing20000terms and definitions in Technical Specifications, Technical Reports and other English and French, with equivalent terms in 16 additional documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical iPad. Vocabulary(IEV)online. IEC publications search-www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary The advanced search enables tofind IEC publications bya 65 000 electrotechnical terminology entries in English and varietyof criteria(referencenumber, text,technical French extracted from the Terms and Definitions clause of committee,..). It also gives information on projects, replaced IEC publications issued since 2002.Some entries have been and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and CISPR. IEcJustPublished-webstore.iec.ch/justpublished Stay up to date on all new IEC publications. Just Published IECCustomer Service Centre-webstore.iec.ch/csc details all new publications released. Available online and If you wish to give us your feedback on this publication or also once a monthby email. needfurtherassistance,pleasecontacttheCustomerService Centre:[email protected]. Copyright Interne lonal Electrotechnical Commission from IHS IEC IEC61511-1 Edition 2.1 2017-08 CONSOLIDATED VERSION colour inside Functionalsafety-Safetyinstrumentedsystemsfortheprocessindustry sector- Part 1: Framework, definitions, system, hardware and application programming requirements INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 13.110; 25.040.01 ISBN978-2-8322-4752-5 Warning! Make sure that you obtained this publication from an authorized distributor. ?RegisteredtrademarkofthefnternationalElectrotechnicalCommission Copyright Inter se from IHS CoyrhanlElectroehnicoms 397000001, Userbahari, farhana No reproductic otforRe IEC IEC61511-1 Edition 2.12017-08 REDLINEVERSION colour inside Functional safety-Safetyinstrumentedsystems fortheprocess industry sector- Part 1:Framework,definitions,system,hardware and application programming requirements 61511-1:2016-02+AMD1:2017-08CSV(en) IEC61511-1:2016+AMD1:2017CSV - 2 - ?IEC2017 CONTENTS FOREWORD.. INTRODUCTION 1 Scope... 2 Normativereferences 3 Terms,definitions and abbreviations 3.1 Terms.... .13 3.2 Terms and definitions. 13 3.3 Abbreviations..... 4 ConformancetotheIEC61511-1:2016 5 Management of functional safety 32 5.1 Objective.. .32 5.2 Requirements.. .33 5.2.1 General. .33 5.2.2 Organization and resources.. 5.2.3 Riskevaluationandriskmanagement. 5.2.4 Safety planning.. .33 5.2.5 Implementingandmonitoring .34 5.2.6 Assessment, auditing and revisions. .34 5.2.7 SiS configuration management 37 6 Safety life-cyc