Instruction Manual

WP2P–RepeaterModule-QuickStartGuide–v1.2–June2013 3
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 www.qtech.co.nz Tel:033663713
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Aerial Selection Notes
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TheaerialselectedfortheRepeaterwillmostlikelybean“omni
directional”whiptypeaerial.
WerecommendpartnumberPD9218asasuitableaerialforthe
repeater.Thisisanexternalmounting,professionalgradeaerial
with5mofcoaxandastainlessmountingbracket.
EachRepeatermoduleissuppliedwiththestandardstubaerial
whichisperfectforsystemtestingandshortrangeapplications.
TheuseofdirectionalYagitypeaerialsisunlikelytobeasuitable
solutionforaRepeater.
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Power Supply Notes
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PowerSupply&CurrentConsumption
TheWP2PRepeateroperatesfromanominal12VoltDCpowersupply.
Currentconsumptionis~30mA.
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.
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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.
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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.
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OverVoltageProtection
TheWP2Pmoduleisovervoltageprotectedbya13voltZenerDiode‘crowbar’thatwill
conductandblowtheinternalfuseforvoltages>14volts.TheWP2Pwilltolerate13.8volts,
butwillbegintodrawexcessivecurrentandblowthefuseatinputvoltages>14.6V.
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 Note–SolarSuppliesanddesignconsiderations
BeforeusinganyWP2Pmoduleinasolarpoweredsystempleasecheckour“Solar
ApplicationNote”onourwebsite.Explicitconsiderationmustbegiventothe
maximumvoltageandvoltageregulationtopreventdamage.
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