Cov lus qhia tsheb npav transmitter
485 yog ib hom tsheb npav serial uas tau siv dav hauv kev lag luam kev sib txuas lus.485 kev sib txuas lus tsuas yog xav tau ob lub xov hlau (kab A, kab B), kev sib kis ntev yog pom zoo kom siv cov ntaub thaiv npog sib tw.Raws li txoj cai, qhov siab tshaj qhov sib kis ntawm 485 yog 4000 ko taw thiab qhov siab tshaj plaws kis tau tus mob yog 10Mb / s.Qhov ntev ntawm tus khub sib npaug sib npaug yog qhov sib npaug ntawm qhov sib kis, uas yog qis dua 100kb / s kom ncav cuag qhov siab tshaj plaws kis tau tus mob.Qhov siab tshaj plaws ntawm cov kis tau tus mob tsuas yog ua tiav nyob rau hauv luv luv nrug.Feem ntau, qhov siab tshaj plaws kis tau tus mob tau txais ntawm ib tug twisted khub hlau ntawm 100 meters tsuas yog 1Mb / s.
Rau 485 cov khoom sib txuas lus, qhov kev sib txuas lus feem ntau yog nyob ntawm cov kab sib kis tau siv, feem ntau yog qhov zoo dua cov ntaub thaiv npog, qhov deb ntawm kev sib kis yuav yog.
Tsuas muaj ib tug tswv nyob rau hauv lub npav 485, tab sis muaj ntau yam qhev pab kiag li lawm tso cai.Tus tswv yuav sib txuas lus nrog ib tug qhev, tab sis tsis muaj peev xwm sib txuas lus ntawm qhev.Kev sib txuas lus nyob deb yog raws li 485 tus qauv, uas muaj feem xyuam rau cov khoom siv sib txuas lus siv, kev sib txuas lus ib puag ncig, kev sib txuas lus tus nqi (baud tus nqi) thiab tus lej ntawm cov qhev txuas nrog.Thaum qhov kev sib txuas lus nyob deb, yuav tsum muaj 120-ohm davhlau ya nyob twg tiv thaiv los txhim kho kev sib txuas lus zoo thiab ruaj khov.Qhov kev tiv thaiv ntawm 120 ohms feem ntau txuas nrog thaum pib thiab xaus.
Cov kev sib txuas ntawm lub tsheb npav transmitter thiab lub tsheb npav tswj txee yog raws li hauv qab no:
Daim duab 1: Bus transmitter kev twb kev txuas tsheb npav tswj txee txuas txoj kev
Sensor: cov pa tshuaj lom yog electrochemical, combustible gas yog catalytic combustion, carbon dioxide yog infrared
Lub sij hawm teb: ≤40s
Hom kev ua haujlwm: ua haujlwm tsis tu ncua
Kev khiav hauj lwm voltage: DC24V
Cov zis hom: RS485
Qhov kub thiab txias: -20 ℃ ~ 50 ℃
Humidity ntau: 10 ~ 95% RH [tsis muaj condensation]
Explosion-proof Certificate No.PIB: CE15.1202
Kev tawg pov thawj: Exd II CT6
Installation: phab ntsa-mounted (ceeb toom: xa mus rau lub installation daim duab)
Cov qauv zoo li: lub plhaub transmitter siv lub plhaub tuag-cam khwb cia txhuas lub plhaub tsim nrog cov qauv flameproof, qhov zawj tsim ntawm lub hau sab sauv yog qhov zoo rau kev kaw lub plhaub, lub hauv ntej ntawm lub sensor yog tsim los nrog cov qauv qis kom ntseeg tau qhov zoo tshaj plaws kev sib cuag ntawm lub sensor. thiab cov pa roj, thiab cov inlet txais qhov tawg-pov thawj dej sib koom ua ke.
Sab nraud qhov ntev: 150mm × 190mm × 75mm
Qhov hnyav: ≤1.5kg
Table1: General gas parameter
| Roj | Gas npe | Technical Performance index | ||
| Kev ntsuas ntau | Kev daws teeb meem | Tswb point | ||
| CO | Cov pa roj carbon monoxide | 0-1000 p.m | 1ppm ua | 50 ppm |
| H2S | Hydrogen sulfide | 0-100 ppm | 1ppm ua | 10 ppm |
| EX | Combustible gas | 0-100% LE | 1% LOJ | 25% LE |
| O2 | Oxygen | 0-30% vol | 0.1% vol | Tsawg 18% vol Siab 23% vol |
| H2 | Hydrogen | 0-1000 p.m | 1ppm ua | 35ppm ua |
| CL2 | Chlorine | 0-20 ppm | 1ppm ua | 2ppm ua |
| NO | Nitric oxide | 0-250 hnub | 1ppm ua | 35ppm ua |
| SO2 | Sulfur dioxide | 0-100 ppm | 1ppm ua | 5ppm ua |
| O3 | Ozone | 0-50 ppm | 1ppm ua | 2ppm ua |
| TSIS MUAJ 2 | Nitrogen dioxide | 0-20 ppm | 1ppm ua | 5ppm ua |
| NH3 | Ammonia | 0-200 ppm | 1ppm ua | 35ppm ua |
| CO2 | Cov pa roj carbon dioxide | 0-5% vol | 0.01% vol | 0.20% vol |
Lus Cim: Cov lus saum toj no 1 tsuas yog cov roj tsis muaj dav dav xwb.Thov hu rau cov chaw tsim khoom kom paub cov roj tshwj xeeb thiab ntau yam yuav tsum tau ua.
Lub tsheb npav transmitter system yog lub network (gas) saib xyuas qhov system uas sib txuas cov roj xa hluav taws xob thiab 485 teeb liab kis tau tus mob thiab raug kuaj pom ncaj qha thiab tswj los ntawm PC party computer lossis tswj txee.Nrog ib tug relay tso zis, lub relay yuav kaw thaum lub roj concentration nyob rau hauv lub tswb ntau yam.Lub tsheb npav transmitter system yog tsim los ua raws li cov qauv tsim ntawm 485 tsheb npav network, thiab siv rau tus qauv 485 tsheb npav network kev sib txuas lus.
Daim duab 2: Internal daim duab ntawm transmitter
Qhov kev xav tau ntawm kev xa tsheb npav yog tib yam li tus qauv 485 npav.Txawm li cas los xij, nws kuj suav nrog qee qhov kev tsim tus kheej, xws li:
1. Sab hauv tau ua ke nrog 120 ohm offset tsis kam, xaiv los ntawm kev hloov.
2. Feem ntau, kev puas tsuaj rau qee cov nodes yuav tsis cuam tshuam rau kev ua haujlwm ntawm lub tsheb npav transmitter.Txawm li cas los xij, nws yuav tsum tau taw qhia tias yog tias cov khoom tseem ceeb hauv lub node raug puas tsuaj loj, tag nrho lub tsheb thauj mus los yuav ua rau tuag tes tuag taw.Thiab Thov hu rau cov chaw tsim khoom rau cov kev daws teeb meem tshwj xeeb.
3. Kev ua haujlwm ntawm lub cev yog qhov ruaj khov, txhawb nqa 24 teev ntawm kev ua haujlwm tas mus li.
4. Qhov siab tshaj plaws theoretical pub yog 255 nodes.
Nco tseg: cov kab teeb liab tsis txhawb nqa kub ntsaws.Pom zoo siv: thawj zaug txuas 485 tsheb npav teeb liab kab, tom qab ntawd energize lub node mus ua hauj lwm.
Phab ntsa mounting txoj kev: kos lub qhov rau ntawm phab ntsa, siv 8 hli × 100 hli expansion bolts, kho expansion bolts rau ntawm phab ntsa, nruab lub transmitter, thiab ces kho nws nrog txiv ntseej, elastic ncoo thiab tiaj tus ncoo, raws li qhia nyob rau hauv daim duab 3.
Tom qab lub transmitter yog tsau, tshem lub hau sab sauv thiab qhia lub cable los ntawm lub inlet.Saib cov duab kos duab rau cov kev sib txuas terminals nrog qhov zoo thiab qhov tsis zoo polarity (Ex hom kev sib txuas), tom qab ntawd kaw cov dej sib koom ua ke, kaw lub hau saum toj kawg nkaus tom qab kuaj xyuas.
Nco tseg: lub sensor yuav tsum poob thaum ntsia
Daim duab 3: Sab nraud qhov ntev thiab mounting qhov bitmap ntawm transmitter
1. Ob lub cables raug pom zoo rau lub hwj chim qaum thiab teeb liab.Cov kab hluav taws xob siv PVVP, thiab cov kab teeb liab yuav tsum tau txais kev lees paub thoob ntiaj teb kev tiv thaiv kev sib tw (RVSP twisted khub).Kev siv cov ntaub thaiv kab sib tw sib tw yuav pab txo qis thiab tshem tawm cov kev faib tawm uas tsim los ntawm ob 485 cov kab sib txuas lus thiab cov kev cuam tshuam ntau hom tsim nyob ib ncig ntawm cov kab sib txuas lus.485 kis tau tus mob sib txawv raws li cov hlau xaiv, thiab feem ntau tsis ncav cuag qhov siab tshaj plaws kev sib kis deb.Nws raug nquahu kom tsis txhob siv 4 core cable, lub zog thiab teeb liab siv tib lub cable.Daim duab 4 yog kab teeb liab, thiab daim duab 5 yog kab hluav taws xob.
Daim duab 4: Cov kab teeb liab
Daim duab 5: Cov kab hluav taws xob
2. Cov xaim xaim hauv kev tsim kho kom tsis txhob muaj qhov tshwm sim ntawm lub voj, uas yog, kev tsim ntawm ntau lub voj voog coil.
3. Thaum kev tsim kho yuav tsum tau sib cais los ntawm lub raj, kom deb li deb ntawm cov xaim hluav taws xob siab, kom tsis txhob muaj hluav taws xob muaj zog, muaj zog sib nqus teeb liab.
485 tsheb npav siv cov qauv hauv tes, ua kom tshem tawm lub hnub qub kev sib txuas thiab kev sib txuas bifurcation.Lub hnub qub kev sib txuas thiab kev sib txuas bifurcated yuav tsim cov teeb liab kev xav, yog li cuam tshuam rau 485 kev sib txuas lus.Cov ntaub thaiv npog yog txuas nrog lub tsev transmitter.Cov kab kos tau pom hauv daim duab 6.
Daim duab 6: Cov kab kos kom ntxaws
Daim duab kab hluav taws xob raug pom muaj nyob hauv daim duab 7 thiab daim duab kab hluav taws xob tsis raug yog pom hauv daim duab 8.
Daim duab 7: Correct wiring diagram
Daim duab 8: Cov kab hluav taws xob tsis raug
Yog tias qhov kev ncua deb ntev dhau lawm, yuav tsum muaj qhov rov ua dua, thiab txoj kev sib txuas rov ua dua yog qhia hauv daim duab 9. Cov khoom siv hluav taws xob tsis pom.
Daim duab 9: Repeater txuas txoj kev
4. Tom qab xaim tiav lawm, txuas qhov chaw ntawm cov transmitters ua ntej, txiav tawm cov hlua hluav taws xob thiab cov kab teeb liab, thiab ua kom xaus kev sib txuas ntawm lub transmitter, raws li qhia hauv daim duab 2. Siv lub multimeter los kuaj seb puas muaj qhov luv luv ntawm cov teeb liab. thiab cov kab hluav taws xob.Qhov kev tiv thaiv tus nqi ntawm cov teeb liab kab A thiab B yog li 50-70 ohms.Thov xyuas seb tus tswv tsev puas tuaj yeem sib txuas lus nrog txhua lub transmitters thiab tom qab ntawd txuas cov seem seem rau kev sim.Teem lub kawg transmitter hloov tam sim no txuas nrog rau, Lwm yam transmitter hloov mus rau 1.
Nco tseg: qhov kawg txiav tawm tsuas yog rau kev sib txuas ntawm tsheb npav.Lwm txoj kev sib txuas ntawm cov hlau tsis raug tso cai.
Thaum muaj ntau daim ntawm transmitters thiab nyob deb, thov xyuam xim rau hauv qab no:
Yog hais tias tag nrho cov nodes tsis tau txais cov ntaub ntawv, thiab qhov taw qhia lub teeb nyob rau hauv lub transmitter tsis ua hauj lwm, nws qhia tau hais tias lub hwj chim mov tsis muaj txaus tam sim no, thiab lwm switching fais fab mov yuav tsum tau, yog li ntawd nws yog pom zoo kom siv ib tug high-power fais fab mov. .Nyob rau hauv txoj hauj lwm ntawm ob lub switching fais fab mov, disconnect 24V +, 24V- kev cob cog rua kom tsis txhob cuam tshuam ntawm ob switching fais fab mov.
B.Yog tias qhov poob ntawm cov node loj heev, nws yog vim qhov kev sib txuas lus deb dhau lawm, cov ntaub ntawv tsheb npav tsis ruaj khov, yuav tsum tau siv lub repeater los txuas ntxiv kev sib txuas lus.
5. Lub tsheb npav xaim xaim xaim yog tsuas yog ib qho qhib passive relay.Thaum cov roj concentration ntau tshaj li lub tswb ceeb toom, lub relay tau kaw, hauv qab lub tswb taw tes, tus relay yuav disconnect tus neeg siv yuav tsum tau xaim raws li qhov yuav tsum tau muaj.Yog tias koj xav tswj cov kiv cua lossis lwm yam khoom siv sab nraud, thov txuas cov khoom siv sab nraud thiab cov khoom sib txuas sib txuas hauv cov khoom siv hluav taws xob tsim nyog (raws li qhia hauv daim duab 10 daim duab kab hluav taws xob ntawm lub relay)
Figure 10 kab kos duab ntawm lub relay
RS485 tsheb npav transmitter system hais txog cov teeb meem thiab kev daws teeb meem
1. Qee lub terminals tsis muaj cov ntaub ntawv: feem ntau cov node tsis siv rau vim qee qhov laj thawj sab nraud, txoj hauv kev yog xyuas seb lub teeb pom kev ntawm lub rooj tsavxwm yog flashing.Yog tias qhov taw qhia lub teeb tsis nyob, qhov node tuaj yeem rov ua dua. cais.
2. Qhov taw qhia lub teeb flashes ib txwm, tab sis tsis muaj ntaub ntawv.Nws yog ib qho tsim nyog yuav tsum xyuas seb cov xov hlau A thiab B txuas nrog li cas thiab seb puas muaj kev sib txuas hauv qhov thim rov qab. Disconnect lub hwj chim ntawm cov node thiab tom qab ntawd ntsaws rau hauv cov ntaub ntawv cable dua kom pom seb koj puas tuaj yeem tau txais cov ntaub ntawv node.Tshwj xeeb: tsis txhob txuas lub hwj chim qaum rau cov ntaub ntawv cable chaw nres nkoj, nws yuav ua rau lub RS485 ntaus ntawv puas.
3. Terminal kev twb kev txuas yog yuav tsum tau.Yog hais tias 485 lub tsheb npav thaiv ntev dhau lawm (tshaj 100 meters), nws raug nquahu kom ua tiav kev sib txuas kawg.Qhov kev sib txuas kawg feem ntau yuav tsum tau nyob rau qhov kawg ntawm RS485, raws li qhia hauv daim duab 2.Yog hais tias lub tsheb npav txuas ntev dhau lawm, qhov rov ua dua. Kev sib txuas tuaj yeem siv los txuas ntxiv qhov kev sib kis tau ntev.(ceeb toom: Yog tias siv RS485 repeater, tsis tas yuav tsum muaj kev sib txuas ntawm lub davhlau ya nyob twg ntawm tus repeater thiab kev sib koom ua ke ua tiav.
4. Tsuas yog cov teeb meem saum toj no, yog tias qhov taw qhia lub teeb flashes ib txwm (1 flash ib thib ob) thiab kev sib txuas lus tsis ua haujlwm, cov node tuaj yeem txiav txim siab puas (muab cov kab kev sib txuas lus yog ib txwm muaj). ua kom cov kab hluav taws xob thiab kev sib txuas lus yog OK, thiab tom qab ntawd sab laj nrog cov kev pab cuam cuam tshuam.
Lub sijhawm lav ntawm cov cuab yeej ntsuas roj uas tsim los ntawm peb lub tuam txhab yog 12 lub hlis, uas pib txij li hnub xa khoom.In txheej txheem ntawm kev siv, tus neeg siv yuav tsum ua raws li cov lus qhia ua haujlwm, vim yog siv tsis raug, lossis kev ua haujlwm ua rau lub ntsuas kev puas tsuaj, tsis them rau hauv warranty.
Thov nyeem cov lus qhia ua tib zoo ua ntej siv lub ntsuas.
Kev ua haujlwm ntawm qhov ntsuas yuav tsum ua raws li cov cai teev tseg hauv cov lus qhia.
Kev saib xyuas cov cuab yeej thiab kev hloov ntawm qhov chaw yuav tsum tau ua los ntawm peb lub tuam txhab lossis chaw saib xyuas hauv zos.
Yog tias tus neeg siv tsis ua raws li cov lus qhia saum toj no, pib lossis hloov cov khoom, qhov kev ntseeg siab ntawm cov cuab yeej yuav tsum yog lub luag haujlwm ntawm tus neeg teb xov tooj.
Kev siv cov cuab yeej yuav tsum ua raws li cov kev cai lij choj thiab cov cai ntawm cov koom haum hauv tsev thiab kev tswj xyuas cov cuab yeej hauv lub hoobkas.
Cov khoom muaj feem xyuam
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