MTTFd | wenglor

MTTFd stands for mean time to dangerous failure. Determination of the MTTFd according to EN ISO 13849-1, Annex C.5: MTTFd = 2 × MTTF (typical) MT... text.skipToContent text.skipToNavigation MTTFd MTTFdstandsformeantimetodangerousfailure. DeterminationoftheMTTFdaccordingtoENISO13849-1,AnnexC.5: MTTFd=2×MTTF(typical) MTTFd=(2×MTTF)/10(worstcase) ClassificationaccordingtoENISO13849-1: Note! •Standardsensorsfromwenglorsensoricarenotsafetycomponentsinaccordancewithmachinerydirective2006/42/EC. •wenglorsensoricrecommendstheuseofsafetyproductswhichhavebeenspeciallydevelopedandcertifiedforthisapplication. Warning! •Standardcomponentsarenotsuitableforpersonalsafetytasks. •Standardopticalsensorsmaynotbeusedfordetectingpersons(inadditiontoMTTFd,numerousothercriteriaandmeasuresmustbeobservedinordertoimplementsafetyapplications). wenglorsensoricGmbHdeterminesMTTFdvaluesforstandardsensorsbasedonthefollowing: •Partscountprocess(DINENISO13849-1:2008,appendixD.1) •Failureratesforcomponents(SiemensstandardSN29500)ormanufacturer’sspecificationsforspecialcomponents(e.g.ASIC) •Ambientconditions:Ta=40 °C,Uop=24VDC •Asafetyfactorof10(seealsoENISO13849-1,appendixC.5.1)isnotusedforthespecifieddatasheetvaluebecausecorrectuseofthedatasourcescanbeassured. InadditiontotheMTTFdvaluedesignatedinthedatasheet,thefollowingcharacteristicvaluesapplytostandardsensors: •DC=0%.Standardproductsdonothaveanydiagnosticcoverage. •TM=11.42a(photoelectronicsensorsandultrasonicsensors) •TM=20a(inductivesensorsandothersensors) •Thisdataisvalidinsofarasnototherwisestipulatedinthedatasheetoroperatinginstructions. ProductArea ProductHighlights Applications ShowProductComparison ProductComparison DetailedProductComparison EmptyList Hide 3/4 4/4 5/4 6/4