Pilz PNOZ s50 - Safety Guidelines and Regulations; Intended Use and Improper Use

Safety
OperatingManualPNOZs50
1002194EN02
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3 Safety
3.1 Intendeduse
ThePWMrelayPNOZs50isdesignedforuseinsafetyrelatedapplications.
ThedevicemeetstherequirementsofENISO138491uptoPLeandENIEC62061upto
SILCL3.Forexample,itisdesignedforusewith
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Mechanicalholdingbrakes.
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Valves.
IntendeduseincludesmakingtheelectricalinstallationEMCcompliant.Theproductisde
signedforuseinanindustrialenvironment.Itisnotsuitableforuseinadomesticenviron
ment,asthiscanleadtointerference.
Thefollowingisdeemedimproperuseinparticular:
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Anycomponent,technicalorelectricalmodificationtotheproduct
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Useoftheproductoutsidetheareasdescribedinthismanual
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Useoftheproductoutsidethetechnicaldetails(seechapterentitled“TechnicalDe
tails”)
Pleasenotethefollowingsafetyguidelines:
Hazardanalysis
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Themachinemanufacturermustproduceahazardanalysisforthemachine.Hemust
takeappropriatemeasurestoensurethatunexpectedmovementsdonotleadtohaz
ardoussituationsforeitherpeopleorequipment.
Demandsonthesafetycontrolsystem
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ThePNOZs50mayonlybeoperatedinconjunctionwithahigherlevelsafetycontrol
system.
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Theoutputsonthesafetycontrolsystemusedtoactivatefastshutdownmustbetested
todetectshortsacrosscontactsandearthfaults.
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ThefaultsignaloutputO3mustbeevaluatedtogetherwithstatusoutputsO4(ifO1+/
O1isused)andO5(ifO2+/O2isused),ifthisisdemandedbytheplant/machine's
safetyrequirements.Processingofthesesignalsisusedtocheckthefeasibilityofthe
signalstates.Evaluationofthesesignalsmustbesuitabletoachieveasafecondition
fortheapplication.
Demandsontheconnected,inductiveload
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Theinductiveloadmustguaranteethedemandsonthesafetyfunctioninadeener
gisedstate.Forexample,inadeenergisedstateaconnectedsafebrakemustalways
beapplied,muststopahazardousmovementandmustpreventunintendedstartup.
Slowshutdownintheeventofafault
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Whendesigningasafeapplication,youshouldconsiderthataslowshutdowninstead
ofafastshutdownmaybeeffectiveintheeventofafault.Aconnectedbrakemayhave
alongerstoppingdistance.
Slowshutdown
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Thepowercircuit'sslowshutdownisnotsafetyrelated.Itmayonlybeusedwhenper
mittedbythehazardanalysis.