Qtech-data-systems Wireless Point to Point (WP2P) - Digital & Ana Manuale Utente Scaricare il pdf (Pagina 2)

WirelessPointtoPoint-DIGITAL&ANALOGUE-QuickStartGuide–v1.1–June2013 2

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 www.qtech.co.nz Tel:033663713

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Wireless Point to Point System

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WirelessPointtoPoint(WP2P)modulescanbeusedtolinkelectricaldevicestogetherin

situationswherethephysicalseparationorterrainbetweenthemwouldmakedirectwiring

uneconomicorimpractical.

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TheWP2Pmodulesincorporatehighspeeddigitalradioswhichhavearangeofuptotwo

kilometres.Themodulesusetheintegratedlowpower900MHzdigitalradiostocommunicate

theirinputstatetotheothermodule.

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EachWP2P–DIGITAL&ANALOGUEmodulehastwoswitchinputs,tworelayoutputs,one

analogueinputandoneanalogueoutput.

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DigitalI/O

TheWP2Pmodulesoperatebycopyingthestateofeachswitchinputtothecorresponding

relayoutputontheotherWP2Pmodule.Whenaswitchinputisclosed,therelayoutputon

theothermodulewillclose,andwhentheswitchisreleased,therelaywillopenagain.

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WP2PModule1

Closeswitchcontacton“INP1”

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WP2PModule2

“RLY1”closesoperatinglight

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Thedelaybetweenaninputactivatingandthecorrespondingoutputactivatingisnormally

lessthan0.2seconds(seenotes).Withsuchafastresponsetime,theWP2Pdevicescanbe

usedforflowmeterpulseapplications,allowingpulseratesofupto5pulsespersecondtobe

communicated.

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AnalogueI/O

TheWP2P–DIGITAL&ANALOGUEoperatesbycopyingtheanalogueinputvaluetothe

analogueoutputontheothermodule.

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TheanalogueI/Ocanbeconfiguredforcurrentlooporvoltageoperation.Thefactorydefault

configurationisforcurrentloopoperation.TheanalogueI/Ooperatesoverarangeof0-

20mA,whichmakestheWP2P–DIGITAL&ANALOGUEmodulescompatiblewiththe

industrystandard4-20mArange,whichallowsdetectionofanopencircuitfailure.

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TheAnalogueI/Ohas12bitresolution,astatedaccuracyof+/-1%FSD,andissampledata

rateofoncepersecond.

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WP2PModule1

Analogue0-20mAsignalinput

WP2PModule2

Analogue0-20mAsignaloutput

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Qtech-data-systems Wireless Point to Point (WP2P) - Digital & Ana Manuale Utente Pagina 2

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