EN IEC 62061 - Everything you need to know - Unique Safety ...

The harmonised standard EN IEC 62061 covers all safety-relevant parts of electrical control systems in machinery. The standard applies to the whole life ... HitentertosearchorESCtoclose EN EN NL DE ENIEC62061 Home/Lawsandregulations/ENIEC62061 ENIEC62061functionalsafetyofprogrammablesystems TheharmonisedstandardENIEC62061coversallsafety-relevantpartsofelectricalcontrolsystemsinmachinery.Thestandardappliestothewholelifecycleofthemachinefromdesigntodecommissioning. ENIEC62061isthebasisforthesuccessfulintegrationofsafety-relatedelectricalcontrolsthatcomplywithEN13849-1andIECEN61508inordertovalidatethekeyrequirementsforthevalidationofthesafetyfunctions. AswithENISO13849-1,thegoalistodeterminewhethertheimplementedsafetymeasuresaresuitableforreducingsafetyrisks.InENIEC62061thisisassessedbyusingtheriskgraphandexpressedinoneofthreeSafetyIntegrityLevels(SIL),whereSIL1appliestothelowestsafetyriskandSIL3tothehighest. UsetheriskographtodeterminetheSafetyIntegrityLevel(SIL) HowdoesariskassessmentaccordingtoEN62061work?Riskassessmentisaniterativeprocess.Thismeansthatitmaybenecessarytogothroughtheprocessseveraltimes. TheriskmustbeassessedandtheSILdeterminedforeachhazardwheretheriskneedstobedecreasedbycontroltechnologymeasures. TheriskisestimatedbyENIEC62061considering: Se Severityofinjury Fr Frequencyanddurationofexposuretothehazard Pr Thelikelihoodofahazardouseventoccurring Av Thepossibilitytoavoidorreducedamage Todeterminetherisks,complexcalculationsarerequired.ThePAScalcalculationsoftwaremakesthiseasierandmoretransparent. Classificationofseverityofinjury(Se) Se4  Irreversible:death,lossofanarmoreye Se3  Irreversible:brokenlimbs,lossoffinger(s) Se2  Reversible:medicaltreatmentrequired Se1  Firstaid(FAFS)required Classificationoffrequencyanddurationofexposure(Fr)>10min Fr5  <=1hour Fr5 >1hourto<=1day Fr4 >1dayto<=2weeks Fr3 >2weeksto<=1year Fr2 >1year Probabilityclassification(Pr) Pr5  Veryhigh Pr4  Likely Pr3  Possible Pr2  Rare Pr1  Negligible Classificationofthepossibilityofrestriction/prevention(Av) Av5 Impossible Av3 Rare Av1  Likely Doyouneedsupport? Contactourspecialists ContactUs SafetyIntegrityLevel(SIL)matrixofdesignation TheSILisdeterminedusingthefollowingtable.UsetheformulaK=F+W+PfordeterminingtheKclass. Severity(S) Class(K) 3–4 Class(K) 5–7 Class(K) 8–10 Class(K) 11–13 Class(K) 14–15 4 SIL2 SIL2 SIL2 SIL3 SIL3 3 (OM)* SIL1 SIL2 SIL3 2 (AM) SIL1 SIL2 1 (AM) SIL1 *OM=Othermeasures Whatrequirementsshouldbetakenintoaccount? Thefollowingminimumrequirementsaresetwhenadesignoftherelevantsafetyfunctionsisselected: 1.Structurallimitationsofsubsystems TheSILachievedbytheSRECS(Safety-RelatedElectricalControlSystem)basedonthestructuralconstraintsislowerthanorequaltothelowestSILCLofanysysteminvolvedintheexecutionofthesafetyfunction.Thecontrolsystemarchitectureandthe"safefailurefraction"(SFF)playanimportantroleinthisrespect. Percentofsaferfailures(SFF) Hardwarefaulttolerance HFT0 Hardwarefaulttolerance HFT1 Hardwarefaulttolerance HFT2 <60% Notpermitted SIL1 SIL2 60%to<90% SIL1 SIL2 SIL3 90%to<99% SIL2 SIL3 SIL3 >=99% SIL3 SIL3 SIL3 2.Probabilityofcoincidentaldangeroushardwarefailure TheprobabilityofadangerousfailureofeachSafety-RelatedControlFunction(SRCF)duetodangerousrandomhardwarefailuresshallbeequaltoorlessthanthefailurelimitspecifiedinthespecificationofthesafetyrequirements. SILaccordingtoEN62061 Probabilityofadangerousfailureperhour(PFHD)[1/h] SIL3 >=10E-8to<10E-7 SIL2 >=10E-7to<10E-6 SIL1 >=10E-6to<10E-5 Weare heretohelp Contactoneofourtechnicalspecialistsorsalesengineers MarcoHeijkoopSalesEngineer [email protected] RickdeJongeSalesEngineer [email protected] RobVoordendag [email protected] RobertvandeVen [email protected] Request ameeting Forallyourquestionsaboutourproductsandservices,pleasefillintheformbelow(responsewithin1workingday). Home/Lawsandregulations/ENIEC62061