MSA ULTIMA X5000 - Page 34

WARNING!
ULTIMAX5000withrelaysisnotapprovedforDivision2orZone2wiringmethods.UseofDivision2orZone2wiring
methodscouldleadtoignitionofahazardousatmosphere.
Failuretofollowthiswarningcanresultinseriouspersonalinjuryordeath.
RelayConnectionstoInductiveLoads
Ifconnectingtherelaystomotors,fluorescentlighting,orotherinductiveloads,itisnecessarytosuppressanysparksor
inductivefeedbackthatmayoccurattherelaycontact.Theseeffectsmayrendertheunitinoperative.
OnewaytoreducetheseeffectsistoinstallaQuencharc
®
(P/N630413)acrosstheloadbeingswitched.
FaultRelayWiringandConfigurations
TheFaultRelaystateinnon-faultoperatingconditionisEnergizedandterminalconnectionsaresuppliedforNormally
ClosedandNormallyOpen.
Theenergizedfaultrelaysettingprovidesanelectricalpathforfail-saferelayoperation.Intheeventofanyfailure,including
lossofpower,therelaywillchangetothede-energizedstatetoindicateafaultcondition.
TheFaultRelaystatecannotbereconfigured.
RelayEnergyStateandTerminalConnections
TheULTIMAX5000relayscanbeselectedasenergizedorde-energizedonthedevice.ThedefaultconfigurationistheDe-
Energizedstate.Thepreferredrelayenergystateshouldbedeterminedbeforemakingconnections.Table9showsthe
terminalconnectionsbyenergystateandisapplicabletobothrelay1andrelay2.
Table 9 Relay Terminal Connections by Energy State
EnergyState NC(NormallyClosed) NO(NormallyOpen)
De-Energized(default) Closed Open
Energized Open Closed
US Ultima X5000 Gas Monitor 34
3 Installation