Lo lus "Hlau System" yog hais txog ntau cov xov hlau siv los muab cov hwj huam uas siv rau lub ntsuas thiab los hloov cov qauv txheem teeb tsa. Lo lus "ob peb-hlau hluav taws xob" tau qhia tom qab yug ntawm ob-hlau xa tawm. Qhov no yog qhov tshwm sim ntawm kev siv dav dav ntawm hluav taws xob hluav taws xob hauv kev ua piv txwv. Qhov xwm ntawm kev ua kom muaj zog yog lub zog hloov dua siab tshiab txheej txheem, uas tsis tuaj yeem sib cais los ntawm lub zog hluav taws xob. Yog li ntawd, thawj plaub tus neeg transmitters tshwm sim, piv txwv li, ob lub xov hlau yog lub luag haujlwm ntawm cov hloov dua siab tshiab (piv txwv li, voltage, thiab lwm yam.
Cov twj paj nruag muaj zog los ntawm 220vac yuav tsum yog plaub-xaim.
Plaub-xaim cim teeb liab hais txog: Fais fab Circuit Court thiab teeb liab Circuit Court yog kev ywj pheej ntawm ib leeg, cais los ntawm kev sib cais ntawm 4 ~ 20MA sciter txujci. Yog li lub teeb liab yuav tsum raug cais tawm thiab feem ntau tsis yog av. Lub zog hluav taws xob tuaj yeem yog 24VDC lossis 220VAC.
Thaum lub hwj chim muab los ntawm ob-xaim system tsis txaus los muab lub zog rau cov twj paj nruag, peb-lub teeb liab yog ib qho {2}} mess txheem teeb liab.
Peb lub xaim ntawm peb-xaim system yog: ib qho rau lub zog hluav taws xob (feem ntau yog 24vdc +), ib qho rau lub teeb liab, thiab kos npe rau lub ntsuas hluav taws xob thiab lub voj dhau los.
Tsis -4 rau 20mA cov cim taw qhia tsis raug xa mus ua ob-xaim.
Ob-xaim hluav taws xob yog ob lub xov hlau tau siv los ntawm kev sib kis ib txhij ntawm 4 txog 20MA cov cim qhia. Tsis yog-lub cim qhia tsis tau hu ua ob-xaim. Qhov tsawg kawg hluav taws xob muaj peev xwm ntawm ob-xaim hluav taws xob yog: 4MA × 24v - fais fab noj ntawm kev txais ntsuas - kab poob.
Yog li nyob rau hauv cov kev ua haujlwm tiag tiag, plaub-xaim system, peb-hlau system, ob-xaim hluav taws xob yog lub zog loj?
Feem ntau ntawm plaub-hlau fais fab mov rau 220v.ac, tseem muaj fais fab muab rau 24V.DC.
Plaub-hlau transmitter raws li muaj nyob hauv daim duab hauv qab no, feem ntau ntawm nws cov khoom siv fais fab rau 220v.ac, muaj kuj tau muaj zog los ntawm 24V.DC. DC, load tsis kam ntawm 250ω, lossis {{4 4}} ma.dc, thauj tawm ntawm {5}}. 5Kω; Ib txhia tseem muaj MA thiab MV cim, tab sis lub nra tsis kam lossis tawm tswv yim tiv thaiv, vim cov ntawv sau txawv hluav taws xob thiab cov txiaj ntsig sib txawv.
Feem ntau ntawm peb-hlau fais fab mov yog 24V.DC.
Peb-hlau transmitter raws li muaj nyob hauv daim duab hauv qab no, qhov kawg ntawm cov xaim hluav taws xob nrog lub teeb liab, qhov kawg ntawm lub zog hluav taws xob thiab Qhov kawg tsis zoo ntawm lub teeb liab qhia xaim xaim. DC, feem ntau ntawm nws lub zog hluav taws xob rau 24v, cov paib tawm suab muaj} ma.dc, thauj khoom tsis kam ntawm 0-1. 5Kω ; Qee tus kuj muaj MA thiab MV cim, tab sis lub nra tsis kam lossis tawm tswv yim tiv thaiv, vim muaj cov qauv sib txawv thiab cov txiaj ntsig sib txawv.
Ob-hlau fais fab mov yog 24V.DC.
Ob-hlau xa tawm hauv daim duab hauv qab no, nws lub zog hluav taws xob yog 2500, cov khoom tsis zoo ntawm 24V fais fab muab tau muaj peev xwm qis tshaj plaws, Qhov twg yog qhov cim tshwm sim ib txwm, rau cov ntse xovxwm kuj tseem tuaj yeem thauj khoom ntawm {{5} art ma.dc teeb liab FSK kek key.
Vim yog cov qauv ua haujlwm sib txawv thiab cov qauv hloov pauv ntawm ntau yam transmitters, nws kuj yog cov khoom siv sib txawv, nws-hlau xaim daim ntawv ntawm lub transmitter. Yuav ua li cas xaiv plaub-xaim, peb-xaim, ob-xaim ntsuas ntsuas?
Lub zog loj dua 10w, cov kev cai siab dua, kev xaiv cov kev xaiv ntawm plaub-xaim hluav taws xob.
Daim ntawv thov ntawm plaub-xaim cuab yeej, thawj hom pib ntawm DDZ-wower} v.ac, ua raws li cov paib zis rau 0 ~ 10ma.dc plaub -wire lub transmitter tau siv dav. Vim yog qhov nyuaj ntawm kev hloov dua tshiab Circuit Court, kev siv hluav taws xob thiab cov khoom siv ntau yam zoo li muaj plaub-lub zog hluav taws xob, tam sim no lossis plaub-xaim hluav taws xob xav tau Yuav kom muaj kev co lub zog tau noj, yuav tsum tau siv hluav taws xob kev ua kom zoo, lub 2 lub rooj muaj zog rau 10W lossis ntau dua, yog li nws yuav tsum yog plaub-xaim.
Txo cov tsis muaj kev ruaj ntseg hluav taws xob muab, qhov kev xaiv dav dav ntawm peb-xaim ntsuas.
Daim ntawv thov ntawm peb-xaim system, txhawm rau kom tau raws li cov khoom siv fais fab ntawm 220v.ac rau cov fais fab hluav taws xob dC, xws li hluav taws xob fais fab coj, txo cov tsis muaj kev ruaj ntseg hluav taws xob muab. Txoj kev no muaj ib qho peb-xaim xa khoom.
Tsawg zog thiab pheej yig, feem ntau xaiv ob-xaim system.
Daim ntawv thov ntawm ob-xaim cuab yeej, kev siv ntawm 4-20 ma.dc cim, thiab tam sim no cov khoom siv ob-hluav taws xob tau siv dav.
Hauv cov ntsiab lus, rau tus neeg siv, kev xaiv yuav tsum yog ua raws li qhov teeb meem tiag tiag, xws li kev ua tiav ntawm cov khoom siv tau txais, kev nqis peev thiab lwm yam teeb meem los xav txog kev xaiv.
Nws yuav tsum raug sau tseg tias peb-xaim thiab plaub-kav cov qauv tso tawm, vim nws cov qauv tso zis thiab ob-xaim hluav taws xob tsis zoo li qub, yog li hauv daim ntawv thov tsis zoo xaus ntawm nws cov khoom tawm thiab txoj kab tsis zoo ntawm 24v fais fab ua tau txuas rau ib qho chaw uas yog siv los ua kev faib tawm, Lwm yam nyob rau hauv thiaj li yuav qhia tau lub hwj chim nrog lwm cov twj paj nruag, ib yam hauv av thiab kom tsis txhob muaj ntau tiam neeg cuam tshuam. Qhov no yog kom them sai sai seb qhov kev tsis zoo ntawm 24V fais fab muab tuaj yeem txuas nrog cov hauv av.