User guide

WirelessPointtoPoint-DIGITAL&ANALOGUE-QuickStartGuide–v1.1–June2013 4

 www.qtech.co.nz Tel:033663713

Link Status Indicator

WP2PmoduleshaveaLinkstatusLEDwhichislocatednexttothepowerconnector.
Thisistoassistwithsitediagnosticsandcheckingbyindicatingthestateofthe
communicationslinkbetweenpairsofWP2Pmodules.
TheLinklightfunctionsasfollows:
• OFF–Modulefailure,nopower,fuseblown,circuitfailure,etc.
• SLOWFLASH–Modulefunctioningbutnocommunicationwithitspartnermodule.
• ON–Healthywirelesscommunications.TheLEDwillbrieflyflickereachtimeit
receivesmessagesfromtheotherWP2Pmodule.
LinkStatusindicatorisbasedonthe“keep-alive”messagetheWP2Pmodulessendifithas
beenlongerthan30secondssincetheylastsentamessage.Thereforeifoneofthemodules
isturnedoff,thenitwilltakenolongerthan30secondsfortheothermoduletodetectthatthe
linkisdownandbeginflashingtheLinkStatusLED.IftheconnectedI/Oischangingmore
frequentlythanonceevery30seconds,thentheydon’tneedtosendkeep-alivemessages.

WP2P Repeater Module

AWP2PRepeaterModuleisavailabletoincreasetherangeandcoverageofaWP2P
system.ItisusedinsituationswheretheWP2Pmodulesarealongwayapartorthereisan
obstaclepreventingline-of-sightbetweenthem.

TheWP2PRepeaterModuleoperatesbylisteningforcompleteandvalidWP2Pmessages
andthenre-transmittingthem.ItcanbeusedwithbothWP2PDIGITALandWP2PDIGITAL
&ANALOGUEtypemodulessimultaneously.

PleaserefertotheRepeaterQuickStartGuideforfurtherdetails.

Power Supply Notes

PowerSupply&CurrentConsumption
TheWP2Poperatesfromanominal12VoltDCpowersupply.
Currentconsumptionis~66mAinstandby(nooutputrelaysactive)to83/100mA(oneortwo
relaysactive).
Thepowerconnectorisa2.1mmDCSocket,centrepinpositive.Thesupplyvoltageshould
beclean,continuousandtransientfreewithanoutputof12Volts+/-1.5VoltDC.TheWP2P
incorporatesreverseandovervoltageprotection.
Theabsolutemaximumsupplyvoltageis13.8VDCandanysolar/batterydesignneedsto
takethisintoaccount.

Warning–DoNOTuseSwitchModePowerSupplies(SMPS)withthisproduct.The
DC power supply used for this product MUST have a grounded negative or be a
“linear”transformerbasedplugpack.Thereasonisthattheaerial,programmingport
andexternalconnectionscanprovideexposedearthpointsandtheSMPScanimpose
an AC voltage on the DC ground, which can lead to damage. Suitable cost effective
plugpacksareavailablefromQTechP/NPD5412,PD5413&PD5414.


InternalFuse
TheWP2Pmodulecircuitisprotectedbya20mmx5mm500mAfastblowfuse.Thisis
locatedontheinternalcircuitboard.Toaccessthefuse,removethetopcoverbyprizingitoff
itsretainingdimples.Onlyreplacethefusewithanidenticaltype,donotusealternatives.
Thisfusewillblowifthepowersupplymaximumvoltageisexceeded.


