User's Manual

1/28/2015 LMU42x0Hardware&InstallationGuidePULSWiki
https://puls.calamp.com/wiki/LMU42x0_Hardware_%26_Installation_Guide 21/47
TheLMU’sandioPOD;soutputsaredesignedtodriveexternalrelays.Theseoutputsprovideahighcurrent,
opencollectordriverthatcansinkupto150mAeach.Thesedriversmaybeusedtodriveexternalrelaysthat
canthencontrolvehiclefunctionssuchasdoorlocks,fuelshutoffvalves,sirensandlights.Ifadditional
currentisrequiredtodrivetherelays,externalcircuitrycanbeaddedtosourcethecurrent.Thisdiagramisa
typicaluseofanoutputtodrivearelay.
SampleRelayWiring
3.6.4StatusLEDs
TheLMU42x0™isequippedwithtwoStatusLEDs,oneforGPSandoneforCOMM(wirelessnetwork
status).TheLEDsusethefollowingblinkpatternstoindicateservice:
LED#1(CommLEDOrange)Definitions
Condition LED1
ModemOff Off
CommOnSearching SlowBlinking
NetworkAvailable FastBlinking
RegisteredbutnoInboundAcknowledgement AlternatesfromSolidtoFastBlinkevery1s
RegisteredandReceivedInboundAcknowledgement Solid
LED#2(GPSLEDYellow)Definitions
Condition LED2
GPSOff Off
GPSOn SlowBlinking
GPSTimeSync FastBlinking
GPSFix Solid