Iec 61508 Functional Safety.pdf

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1、FunctionalsafetyandIEC61508AbasicguideNovember2002Copyright©IEC2002.Thismaterialmaybefreelyreproduced,exceptforadvertising,endorsementorcommercialpurposes.TheInternationalElectrotechnicalCommission(IEC)mustbeacknowledgedasthesource.AllsuchextractsarecopyrightofIEC,Geneva,Switzerland.Allrightsreser

2、ved.IEChasnoresponsibilityfortheplacementandcontextinwhichtheextractsandcontentsarereproduced;norisIECinanywayresponsiblefortheothercontentoraccuracythereof.FunctionalsafetyandIEC61508:AbasicguideNovember2002ContentsPage1Introduction.................................................................

3、....................................................32Functionalsafety.............................................................................................................32.1Whatisfunctionalsafety?....................................................................................32.2Safe

4、tyfunctionsandsafety-relatedsystems........................................................32.3Exampleoffunctionalsafety................................................................................42.4Challengesinachievingfunctionalsafety.........................................................

5、....53IEC61508–FunctionalsafetyofE/E/PEsafety-relatedsystems....................................53.1Objectives............................................................................................................63.2E/E/PEsafety-relatedsystems.................................................

6、............................63.3Technicalapproach..............................................................................................73.4Safetyintegritylevels...........................................................................................83.5Exampleoffunctionalsafetyrevisited.

7、.................................................................83.6PartsframeworkofIEC61508.............................................................................93.7IEC61508asabasisforotherstandards.....