
PNOZs4
OperatingManualPNOZs4
21396EN13
11
Operation
TheunitisreadyforoperationwhenthePowerLEDispermanentlylit.
LEDsindicatethestatusanderrorsduringoperation:
LEDon
LEDflashes
INFORMATION
Statusindicatorsanderrorindicatorsmayoccurindependently.Inthecase
ofanerrordisplay,the"Fault"LEDwilllightorflash(exception:"Supply
voltagetoolow").AnLEDthatisalsoflashingindicatesthepotentialcause
oftheerror.AnLEDthatislitandisstaticindicatesanormaloperating
status.Severalstatusindicatorsanderrorindicatorsmayoccursimultan
eously.
Statusindicators
Power
Supplyvoltageispresent.
In1
InputcircuitatS12isclosed.
In2
InputcircuitatS22isclosed.
Out
SafetycontactsareclosedandsemiconductoroutputY32carriesahighsignal.
Reset
24VDCispresentatS34.
Errorindicators
AllLEDsoff
Diagnostics:Shortacrosscontacts/earthfault;unitswitchedoff
}
Remedy:Rectifyshortacrosscontacts/earthfault,switchoffsupplyvoltage
for1min.
Fault
Diagnostics:Plugterminatornotconnected
}
Remedy:Insertplugterminator,switchsupplyvoltageoffandthenon
again.
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