User's Manual

1/28/2015 LMU42x0Hardware&InstallationGuidePULSWiki
https://puls.calamp.com/wiki/LMU42x0_Hardware_%26_Installation_Guide 15/47
3.3.4SerialInterfaceConnectors
TheLMU42x0™offers2serialinterfaceconnections(Host/Aux1andAux2)onitsfrontface.Theseare
providedvia2Molex436500501connectorsusingthefollowingpinouts.
Pin SignalName Description 1333375Color InputorOutput
1 VIN_FILT FilteredLMUPower Red PowerSupply
2 VCC3V3 3.3VPower Orange PowerSupply
3 Ground Ground Black Ground
4 TX TransmitData Blue InputtoLMU
5 RX ReceiveData Green OutputFromLMU
SerialInterfaceConnector
UsersshouldonlyuseCalAmpapprovedserialadapterswiththeseconnections.(PartNumber1333375and
1335641)
LMU42x0™SerialCablePluggedintoAux1
3.3.5ExpansionInterface
TheexpansioninterfacelocatedonthebackoftheLMU42x0™viathe16inMolexconnectorisusedto
extendI/OfunctionsandprovideserialaccesstotheLMU42x0™.ItshouldonlybeusedwithCalAmp
expansionharnesses.Theavailableaccessoriesare: