4-20mA tso zis yog dab tsi?
1.) Taw qhia
4-20mA (milliamp) yog ib hom hluav taws xob tam sim no feem ntau siv rau kev xa cov teeb liab analog hauv cov txheej txheem kev lag luam tswj thiab automation systems. Nws yog tus kheej-powered, low-voltage tam sim no voj uas muaj peev xwm xa cov teeb liab nyob rau hauv ntev kev deb thiab los ntawm hluav taws xob tsis muaj suab nrov ib puag ncig yam tsis muaj degrading lub teeb liab.
Qhov ntau yam 4-20mA sawv cev rau qhov ntev ntawm 16 milliamps, nrog plaub milliamps sawv cev rau qhov tsawg kawg nkaus lossis xoom tus nqi ntawm lub teeb liab thiab 20 milliamps sawv cev rau qhov siab tshaj plaws lossis tag nrho cov nqi ntawm lub teeb liab. Tus nqi tiag tiag ntawm cov teeb liab analog tau xa mus yog encoded raws li txoj haujlwm hauv qhov ntau, nrog rau theem tam sim no yog proportional rau tus nqi ntawm lub teeb liab.
4-20mA tso zis feem ntau yog siv los xa cov teeb liab analog los ntawm cov sensors thiab lwm yam khoom siv hauv teb, xws li ntsuas kub thiab ntsuas ntsuas, tswj thiab saib xyuas cov tshuab. Nws kuj tseem siv los xa cov teeb liab ntawm cov khoom sib txawv hauv kev tswj hwm, xws li los ntawm programmable logic controller (PLC) mus rau lub valve actuator.
Hauv kev lag luam automation, 4-20mA tso zis yog ib qho kev siv ntau zaus rau kev xa cov ntaub ntawv los ntawm cov sensors thiab lwm yam khoom siv. 4-20mA tso zis, tseem hu ua lub voj tam sim no, yog ib txoj hauv kev muaj zog thiab txhim khu kev qha rau kev xa cov ntaub ntawv mus ntev, txawm nyob hauv qhov chaw nrov nrov. Qhov kev tshaj tawm blog no yuav tshawb txog cov hauv paus ntawm 4-20mA cov zis, suav nrog nws ua haujlwm li cas thiab qhov zoo thiab qhov tsis zoo ntawm kev siv nws hauv kev lag luam automation systems.
4-20mA tso zis yog ib qho analog teeb liab kis tau los siv qhov tam sim no ntawm 4-20 milliamps (mA). Nws feem ntau yog siv los xa cov ntaub ntawv hais txog kev ntsuas lub cev kom muaj nuj nqis, xws li siab, qhov kub thiab txias, lossis tus nqi ntws. Piv txwv li, qhov ntsuas kub ntawm qhov ntsuas kub yuav xa 4-20mA teeb liab sib npaug rau qhov ntsuas kub nws ntsuas.
Ib qho ntawm cov txiaj ntsig tseem ceeb ntawm kev siv 4-20mA tso zis yog tias nws yog tus qauv thoob ntiaj teb hauv kev lag luam automation. Nws txhais tau hais tias ntau yam khoom siv, xws li sensors, controllers, thiab actuators, yog tsim los ua tau zoo nrog 4-20mA cov cim. Nws ua rau kev sib koom ua ke tshiab rau hauv ib qho system uas twb muaj lawm yooj yim, tsuav yog lawv txhawb 4-20mA cov zis.
2.) 4-20mA tso zis ua haujlwm li cas?
4-20mA tso zis yog kis tau los ntawm kev siv lub voj tam sim no, uas muaj lub transmitter thiab receiver. Lub transmitter, feem ntau yog ib lub sensor lossis lwm yam khoom siv ntsuas lub cev kom muaj nuj nqis, tsim lub teeb liab 4-20mA thiab xa mus rau lub receiver. Lub receiver, feem ntau yog ib tug maub los lossis lwm yam khoom siv lub luag haujlwm rau kev ua cov teeb liab, tau txais 4-20mA teeb liab thiab txhais cov ntaub ntawv nws muaj.
Rau lub teeb liab 4-20mA kom raug xa mus kom raug, nws yog ib qho tseem ceeb kom tswj tau qhov tam sim no tas li los ntawm lub voj voog. Nws yog ua tiav los ntawm kev siv lub tam sim no-txheej resistor nyob rau hauv lub transmitter, uas txwv tus nqi ntawm tam sim no uas yuav ntws los ntawm lub Circuit Court. Tam sim no-txheej resistor qhov tsis kam yog xaiv los tso cai rau qhov xav tau ntawm 4-20mA ntws los ntawm lub voj.
Ib qho txiaj ntsig tseem ceeb ntawm kev siv lub voj voog tam sim no yog tias nws tso cai rau 4-20mA teeb liab xa mus rau qhov ntev yam tsis muaj kev txom nyem los ntawm cov teeb liab degradation. Nws yog vim hais tias cov teeb liab kis tau raws li qhov tam sim no es tsis yog qhov hluav taws xob, uas tsis tshua muaj kev cuam tshuam thiab suab nrov. Tsis tas li ntawd, cov loops tam sim no tuaj yeem xa cov teeb liab 4-20mA hla cov khub twisted lossis coaxial cables, txo cov teeb liab degradation.
3.) Qhov zoo ntawm kev siv 4-20mA tso zis
Muaj ntau qhov zoo rau kev siv 4-20mA tso zis hauv kev lag luam automation systems. Qee qhov txiaj ntsig tseem ceeb suav nrog:
Long-distance signal kis tau tus mob:4-20mA tso zis tuaj yeem xa cov teeb liab hla qhov deb yam tsis muaj teeb meem degradation. Nws yog qhov zoo tshaj plaws rau kev siv nyob rau hauv daim ntawv thov qhov twg lub transmitter thiab receiver nyob deb sib nrug, xws li nyob rau hauv loj industrial nroj tsuag los yog offshore roj rigs.
A: Kev tiv thaiv suab nrov:Cov loops tam sim no muaj zog heev rau lub suab nrov thiab cuam tshuam, uas ua rau lawv zoo tagnrho rau siv nyob rau hauv qhov chaw nrov nrov. Nws yog ib qho tseem ceeb tshwj xeeb tshaj yog nyob rau hauv kev lag luam chaw, qhov twg hluav taws xob nrov ntawm motors thiab lwm yam khoom siv yuav ua rau muaj teeb meem nrog cov teeb liab kis tau tus mob.
B: Compatibility nrog ntau yam khoom siv:Raws li 4-20mA tso zis yog tus qauv thoob ntiaj teb hauv kev lag luam automation, nws tau sib xws nrog ntau yam khoom siv. Nws ua rau kev sib koom ua ke tshiab rau hauv ib qho system uas twb muaj lawm yooj yim, tsuav yog lawv txhawb 4-20mA cov zis.
4.) Qhov tsis zoo ntawm kev siv 4-20mA tso zis
Thaum 4-20mA tso zis muaj ntau qhov zoo, kuj tseem muaj qee qhov tsis zoo rau kev siv nws hauv kev lag luam automation. Cov no suav nrog:
A: Kev daws teeb meem txwv:4-20mA tso zis yog ib qho analog teeb liab kis tau los ntawm kev siv ntau yam ntawm qhov tseem ceeb. Txawm li cas los xij, qhov kev daws teeb meem ntawm lub teeb liab raug txwv los ntawm qhov ntau ntawm 4-20mA, uas tsuas yog 16mA. Qhov no tej zaum yuav tsis txaus rau cov ntawv thov uas xav tau qib siab ntawm precision lossis rhiab heev.
B: Nyob ntawm lub hwj chim mov:Rau lub teeb liab 4-20mA kom raug xa mus kom raug, nws yog ib qho tseem ceeb kom tswj tau qhov tam sim no tas li los ntawm lub voj voog. Qhov no yuav tsum muaj lub zog siv hluav taws xob, uas tuaj yeem yog tus nqi ntxiv thiab qhov nyuaj hauv qhov system. Tsis tas li ntawd, cov khoom siv hluav taws xob tuaj yeem ua tsis tau lossis cuam tshuam, uas tuaj yeem cuam tshuam rau kev sib kis ntawm 4-20mA teeb liab.
5.) Cov lus xaus
4-20mA tso zis yog hom teeb liab siv dav hauv kev lag luam automation. Nws yog kis tau los ntawm kev siv qhov tam sim no ntawm 4-20mA thiab tau txais los ntawm kev siv lub voj tam sim no uas muaj lub transmitter thiab receiver. 4-20mA tso zis muaj ntau qhov zoo, suav nrog kev sib kis mus ntev, kev tiv thaiv lub suab nrov, thiab kev sib raug zoo nrog ntau yam khoom siv. Txawm li cas los xij, nws kuj muaj qee qhov tsis zoo, suav nrog kev daws teeb meem tsawg thiab kev vam khom rau lub zog hluav taws xob. Zuag qhia tag nrho, 4-20mA tso zis yog ib txoj kev txhim khu kev qha thiab muaj zog rau kev xa cov ntaub ntawv hauv cov tshuab automation.
Qhov txawv ntawm 4-20ma, 0-10v, 0-5v, thiab I2C tso zis yog dab tsi?
4-20mA, 0-10V, thiab 0-5V yog tag nrho cov teeb liab analog uas nquag siv hauv kev lag luam automation thiab lwm yam kev siv. Lawv yog siv los xa cov ntaub ntawv hais txog kev ntsuas ntawm lub cev kom muaj nuj nqis, xws li siab, qhov kub thiab txias, lossis tus nqi ntws.
Qhov sib txawv tseem ceeb ntawm cov hom teeb liab no yog qhov ntau ntawm qhov tseem ceeb uas lawv tuaj yeem xa mus. 4-20mA cov teeb liab raug xa mus siv qhov tam sim no ntawm 4-20 milliamps, 0-10V cov teeb liab raug xa mus siv qhov hluav taws xob xws li 0 txog 10 volts, thiab 0-5V cov teeb liab kis tau los ntawm kev siv hluav taws xob xws li 0-5 volts.
I2C (Inter-Integrated Circuit) yog cov txheej txheem kev sib txuas lus digital siv los xa cov ntaub ntawv ntawm cov khoom siv. Nws yog feem ntau siv nyob rau hauv embedded systems thiab lwm yam kev siv uas muaj ntau yam khoom siv yuav tsum tau sib txuas lus nrog ib leeg. Tsis zoo li cov teeb liab analog, uas xa cov ntaub ntawv raws li qhov muaj txiaj ntsig txuas ntxiv, I2C siv cov khoom siv digital pulses los xa cov ntaub ntawv.
Txhua yam ntawm cov teeb liab no muaj nws tus kheej qhov zoo thiab qhov tsis zoo, thiab qhov kev xaiv zoo tshaj plaws yuav yog nyob ntawm daim ntawv thov cov cai tshwj xeeb. Piv txwv li, 4-20mA cov teeb liab feem ntau nyiam rau kev sib kis mus ntev thiab muaj suab nrov tiv thaiv, thaum 0-10V thiab 0-5V cov teeb liab yuav muab kev daws teeb meem siab dua thiab raug zoo dua. I2C feem ntau yog siv rau kev sib txuas lus luv luv ntawm cov khoom siv me me.
1. Ntau yam ntawm cov nqi:4-20mA cov teeb liab xa tawm tam sim no los ntawm 4 mus rau 20 milliamps, 0-10V cov teeb liab xa tawm qhov hluav taws xob xws li 0 txog 10 volts, thiab 0-5V cov teeb liab xa cov hluav taws xob xws li 0 txog 5 volts. I2C yog tus txheej txheem kev sib txuas lus digital thiab tsis xa cov txiaj ntsig txuas ntxiv.
2. Teeb liab kis tau tus mob:4-20mA thiab 0-10V cov teeb liab raug xa mus siv lub voj tam sim no lossis qhov hluav taws xob, feem. 0-5V cov teeb liab kuj kis tau los ntawm kev siv hluav taws xob. I2C kis tau los ntawm kev siv cov digital pulses.
3. Compatibility:4-20mA, 0-10V, thiab 0-5V cov teeb liab feem ntau sib xws nrog ntau yam khoom siv, vim lawv tau siv dav hauv kev lag luam automation thiab lwm yam kev siv. I2C feem ntau yog siv nyob rau hauv embedded systems thiab lwm yam kev siv uas muaj ntau yam khoom siv yuav tsum tau sib txuas lus.
4. Kev daws teeb meem:4-20mA cov teeb liab muaj qhov kev daws teeb meem tsawg vim qhov txwv tsis pub muaj qhov tseem ceeb uas lawv tuaj yeem xa tawm (tsuas yog 16mA). 0-10V thiab 0-5V cov teeb liab tuaj yeem muab kev daws teeb meem siab dua thiab raug zoo dua, nyob ntawm daim ntawv thov tshwj xeeb. I2C yog cov txheej txheem digital thiab tsis muaj kev daws teeb meem zoo ib yam li cov teeb liab analog ua.
5. Tsis muaj suab nrov:4-20mA cov teeb liab muaj zog heev rau lub suab nrov thiab cuam tshuam vim siv lub voj tam sim no rau cov teeb liab kis. 0-10V thiab 0-5V cov teeb liab yuav ua rau muaj suab nrov dua, nyob ntawm qhov kev siv tshwj xeeb. I2C feem ntau tiv taus lub suab nrov vim nws siv cov pulses rau cov teeb liab kis.
Qhov twg yog qhov siv ntau tshaj?
Qhov twg yog qhov zoo tshaj plaws tso zis kev xaiv rau kub thiab av noo transmitter?
Nws yog ib qho nyuaj hais tias qhov kev xaiv tso zis ntau tshaj yog siv rau qhov kub thiab av noo transmitters, raws li nws nyob ntawm qhov system daim ntawv thov tshwj xeeb thiab cov kev xav tau. Txawm li cas los xij, 4-20mA thiab 0-10V tau dav siv rau kev ntsuas kub thiab av noo hauv kev lag luam automation thiab lwm yam kev siv.
4-20mA yog ib qho kev xaiv nrov rau qhov kub thiab av noo transmitters vim nws qhov ruaj khov thiab muaj peev xwm kis tau mus ntev. Nws kuj tseem tiv taus lub suab nrov thiab cuam tshuam, uas ua rau nws haum rau siv nyob rau hauv qhov chaw nrov nrov.
0-10V yog lwm qhov kev xaiv dav siv rau kub thiab av noo transmitters. Nws muaj kev daws teeb meem siab dua thiab qhov raug zoo dua li 4-20mA, uas tej zaum yuav yog ib qho tseem ceeb hauv cov ntawv thov uas yuav tsum tau muaj qhov siab.
Thaum kawg, qhov kev xaiv tso zis zoo tshaj plaws rau qhov ntsuas kub thiab av noo yuav nyob ntawm qhov kev thov tshwj xeeb. Cov yam ntxwv rau qhov kev ncua deb ntawm lub transmitter thiab receiver, theem ntawm qhov tseeb thiab kev daws teeb meem xav tau, thiab kev khiav hauj lwm ib puag ncig (xws li, muaj suab nrov thiab cuam tshuam).
Daim ntawv thov tseem ceeb ntawm 4-20mA tso zis yog dab tsi?
4-20mA tso zis yog dav siv nyob rau hauv industrial automation thiab lwm yam kev siv vim nws robustness thiab ntev kev sib kis muaj peev xwm. Qee qhov kev siv ntawm 4-20mA tso zis muaj xws li:
1. Txheej txheem tswj:4-20mA feem ntau yog siv los xa cov txheej txheem sib txawv, xws li kub, siab, thiab ntws tus nqi, los ntawm cov sensors mus rau cov tswj hauv cov txheej txheem tswj cov txheej txheem.
2. Kev ntsuas kev lag luam:4-20mA feem ntau yog siv los xa cov ntaub ntawv ntsuas los ntawm cov cuab yeej siv, xws li cov ntsuas ntws thiab qib sensors, rau cov tswj lossis cov khoom siv.
3. Tsev Automation:4-20mA yog siv nyob rau hauv lub tsev automation systems xa cov ntaub ntawv hais txog qhov kub thiab txias, av noo, thiab lwm yam tej yam kev mob los ntawm sensors mus rau controllers.
4. Kev tsim hluav taws xob:4-20mA yog siv nyob rau hauv lub zog tsim cov nroj tsuag kom xa cov ntaub ntawv ntsuas los ntawm cov sensors thiab cov cuab yeej mus rau cov tswj thiab cov lus qhia.
5. Roj thiab Roj:4-20mA feem ntau yog siv nyob rau hauv kev lag luam roj thiab roj xa cov ntaub ntawv ntsuas los ntawm cov sensors thiab cov twj paj nruag hauv offshore platforms thiab pipelines.
6. Kev kho dej thiab dej khib nyiab:4-20mA yog siv nyob rau hauv cov dej thiab cov dej khib nyiab kho cov nroj tsuag kom xa cov ntaub ntawv ntsuas los ntawm cov sensors thiab cov cuab yeej mus rau cov tswj thiab cov lus qhia.
7. Khoom noj khoom haus thiab dej haus:4-20mA yog siv rau hauv kev lag luam zaub mov thiab dej haus kom xa cov ntaub ntawv ntsuas los ntawm cov ntsuas ntsuas thiab cov cuab yeej mus rau cov tswj thiab cov lus qhia.
8. Automotive:4-20mA yog siv nyob rau hauv kev lag luam automotive xa cov ntaub ntawv ntsuas los ntawm cov sensors thiab cov cuab yeej rau cov tswj thiab cov lus qhia.
Koj puas xav kawm ntxiv txog peb 4-20 qhov kub thiab av noo transmitter? Tiv tauj peb los ntawm emailka@hengko.comkom tau txais tag nrho koj cov lus nug teb thiab tau txais cov ntaub ntawv ntxiv txog peb cov khoom. Peb nyob ntawm no los pab koj txiav txim siab zoo tshaj plaws rau koj cov kev xav tau. Tsis txhob yig tiv tauj peb - peb tos ntsoov yuav hnov los ntawm koj!
Post lub sij hawm: Jan-04-2023
