FSR FLEX LT-200 - IR Connections; General Purpose I;O

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TheFLEXcontrolpanelusesstandardSerialprotocols.ThestandarddistanceforRS
232communicationis50feetusing22ga.three‐conductorcable.FSRrecommends
theuseofWestPenn230seriescommunicationswireorsimilartoensureproper
signaltransmission.
IRConnections
TheFLEXsystemshipswithtwoIRtransmitters.TheFLEXLT‐200systemcan
poweruptofourunitsontheLT200unitsand2ontheLT100.Usingquality22‐
gaugetwo‐conductorwiretheIRtransmitterscanbeplacedupto100feetaway
fromtheFLEXpanel.TransmitterbudsshouldbeplacedinfrontoftheIRreceiving
windowofthedevicetobecontrolled.Eachpluggablescrewterminalconnectorwill
power2IRtransmitters.Eachconnectorhas2inputsforeachofthe(+)wires.The
groundconnectorisshared.
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GeneralPurposeI/O
TheFlexhas4GPIOports.Itisimportanttonotethatthesearedifferentfromdry
contactclosuresanddonothavethesamefunctionality.TheGPIOportscanbe
configuredasInputsorOutputs.AsanInput,avoltageof2.4VDCto24VDCwill
readasa1whileavoltagebelow+1.0VDCwillreadasa0.WheninterfacedtoTTL
orCMOSlogic,theFlexinputsaredirectlycompatible.Wheninterfacedtoan“open
collector”typeoutputornormallyopencontactclosurethatisactivehigh,make
surethatitisatleast2.4VDCanddoesnotexceed24VDCwhen“on”.Additionally,if
usingan“opencollector”typeoutputthat“leaks”morethan0.1mA,apull‐down
resistormayberequiredtokeeptheFlexinputbelowthe1.0VDCwhenthesource
is“off”.Ifyouareinterfacingtoan“opencollector”ornormallyopencontact
closurethatisactivelow,attacha“pull‐up”resistorof1Kto10Kohmsbetween
yourGPIOpinandtheV+inputoftheFlex.Thiswillholdthepinhighuntilyour