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Safety

OperatingManualPSSuEFAII(T)(R)

21981EN05

3 Safety

3.1 Intendeduse

ThemodulemaybeusedforfailsafeapplicationsinsystemenvironmentB(automation

systemPSS4000).

ThemodulesPSSuEFAIIandPSSuEFAIITmaybeusedasasafetycomponentin

accordancewiththeLiftsDirective95/16/EC,EN811,EN812andEN1151.

Theprogrammablesafetysystemshouldbeinstalledinaprotectedenvironmentthatmeets

atleasttherequirementsofpollutiondegree2.Example:Protectedinsidespaceorcontrol

cabinetwithprotectionclassIP54andcorrespondingairconditioning.

Themoduleprovidesananalogueinput.

TheanalogueinputmeetstherequirementsofENIEC62061:SILCL2.Toachievehigher

safetyvalues,twoanalogueinputswillneedtobeused.PLe(Cat.4)andSILCL3can

beachievedasaresultofredundantinputdata.

Themoduleguaranteesfunctionalsafety,butnotthesafetyoftheentireprocess.

Pleasenotethefollowingduringconfigurationandwithintheuserprogram:

}

With1channeloperation,checkthefeasibiltyofthemeasuredvaluewithananticip

atedmeasuredvalueinordertodetectmeasurementerrorsandoffseterrorsonthe

sensor,ortodetectopencircuitandshortcircuitbetweensensorandmodule.

}

With1channeloperation,useasensorthatmeetstherequirementsofENIEC62061:

SILCL2.

}

With2channeloperation,checkthefeasibilitybyusingtwoinputsandtwosensors.

Takeappropriatemeasurestoavoidcommoncauseerrorsinthesensortechnology,by

usingdiversesensorsoraseparatesupplyvoltageforthesensors,forexample.

}

Monitoradefinedmeasuringrangetodetectopencircuitorshortcircuit:werecom

mend4…20mA.

Themeasuredvalueisattenuatedthroughtheinputfilter.Atthecutofffrequency,theamp

litudeofthemeasuredvalueis70%oftheamplitudeoftheinputsignal.

Westronglyrecommendtheuseofthefollowingfunctionblocks:

}

FS_AnalogueInputSingle(usingoneinput)

}

FS_AnalogueInputDual(usingtwoinputs)

Thefunctionblockscontain"Feasibilitycheck"(onlyonFS_AnalogueInputDual)and"Limit

valuemonitoring"functions,whichenableyoutodetecterrorsinthesensoraswellasthe

wiring.Forthe"Rangemonitoring"functionwerecommendthatyouuseameasuringrange

of4…20mA.

ThemodulePSSuEFAIITissuitableforusewherethereareincreasedenvironmental

requirements(seeTechnicalDetails).

ThemodulePSSuEFAIIRissuitableforusewherethereareincreasedenvironmental

requirementsdemandedbyrailwayapplications(seeTechnicalDetails).

IntendeduseincludesmakingtheelectricalinstallationEMCcompliant.Pleaserefertothe

guidelinesstatedinthe"PSSuniversalInstallationManual".Themoduleisdesignedforuse

inanindustrialenvironment.Itisnotsuitableforuseinadomesticenvironment,asthiscan

leadtointerference.

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