RS485 lub network nyob txhua qhov chaw hauv peb lub neej txhua hnub thiab ua haujlwm} Tab sis ntawm no yog qhov: cov network no feem ntau khiav ua teeb meem. Yog tias cov cables yog ntev dhau lawm, cov phiajcim cov ntaub ntawv tau txais tsis muaj zog thiab nyuaj nyeem. Yog tias koj sim txuas ntau cov khoom siv, lub network qeeb lossis nres ua haujlwm zoo rau nws. Qhov ntawd yog qhov twg RS485 Repeater yog nyob rau hauv - Nws zoo li "koob tshuaj" rau koj cov teeb meem RS485, txhim kho teeb liab ploj thiab cia koj ntxiv cov khoom siv ntxiv. Tab sis tam sim no koj tuaj yeem nug: Kuv puas yuav tsum xaiv 2-xaim lossis 4-xaim rs485 rov ua dua tshiab? Lawv ua haujlwm nyob rau hauv txoj kev sib txawv, thiab xaiv qhov tsis ncaj ncees yuav ua rau koj lub network qeeb, tsis ntseeg, lossis txawm tias tsis muaj qab hau. Kab lus no yuav tsoo dab tsi RS485 Repeater yog, li cas 2-xaim hom ua haujlwm, qhov twg txhua tus yog qhov zoo tshaj plaws, thiab yuav ua li cas xaiv txoj cai rau koj cov kev xav tau. Txog thaum kawg, koj yuav paub tseeb tias RS485 kev rov ua dua tshiab hom haum rau koj qhov project.
Ua ntej: Dab tsi yog RS485 Repeater?
Ib RS485 Repeater yog cov cuab yeej tseem ceeb hauv cov ntaub ntawv sib txuas lus. Nws pab kho ob qhov teeb meem loj nrog RS485 Networks: teeb liab poob dhau qhov kev ncua ntev thiab ob peb pab tau (hu ua "nodes"). Thaum cov ntaub ntawv taug kev los ntawm cov cables, nws tau txais tsis muaj zog- qhov no yog hu ua cov kab. RS485 Kev Repeater Boosts uas tsis muaj zog teeb liab rov qab rau tag nrho lub zog, cia cov ntaub ntawv mus deb dua. Nws tseem tso cai rau koj ntxiv ntau cov nodes: tus qauv RS485 muaj peev xwm muaj 32 nodes, tab sis ib qho RS485 Receer ntxiv 32 ntau dua txhua zaus koj siv ib qho.
Feem ntau cov RS485 rov ua haujlwm hauv cov chaw nyuaj li cov Hoobkas lossis cov nruab sab hauv. Lawv tuaj yeem tswj hwm huab cua sov heev los ntawm {{}} 40℃f (-40℃rau 85 degree) thiab ntub dej (txog 95% av tsis muaj hws). Ntau tus kuj muaj "kev cais tawm" los tiv thaiv RS485 Repeater thiab lwm yam khoom siv los ntawm cov hluav taws xob surges lossis av loj hlob-cov teeb meem uas sib tsoo. Kev paub yog tias koj xav tau 2-xaim Rs485 Receater tseem ntau rau koj lub network, uas yog vim li cas thiaj nkag siab cov qauv yog qhov tseem ceeb los xaiv qhov yog.
2-hlau RS485 Repeater: Ua haujlwm ua haujlwm / siv
Yuav ua li cas 2-xaim RS485 Repeatre ua haujlwm
Lub 2 {- xaim RS485 Repeater ua hauj lwm ua haujlwm yog raws li "ib nrab- cov lus sib txuas lus. Qhov no txhais tau tias nws tsuas tuaj yeem xa lossis tau txais cov ntaub ntawv ntawm ib zaug- tsis yog ob qho tib si. Nws siv tsuas yog ob lub xov hlau: ib qho hu ua A + (Rs 485+) thiab lwm yam b- (RS485-). RS485 Repeneral cia li hloov ntawm kev xa thiab tau txais cov qauv, yog li koj tsis tas yuav tsum tau siv ntxiv rau nws.
Piv txwv li, yog tias ib lub sensor xa cov ntaub ntawv rau lub khoos phis tawm, 2-xees RS485 Repeater ua ntej tau txais lub cim tsis muaj zog, thiab txhawb nws ua ntej xa nws ua ntej. Thaum lub computer xa ib qho kev hais kom rov qab, tus neeg rov ua dua cov qauv hloov mus kom dhau lub teeb liab ntawd rau lub sensor. Nws tseem muaj "kev txiav tawm" (feem ntau yog 1200) kom nres paib tawg, uas ua rau cov ntaub ntawv yuam kev.
Feem ntau siv rau 2-xaim Rs485 rov ua dua
Hlau Rs485 Rov ua dua yog vim tias lawv pheej yig thiab yooj yim rau nruab qhov {{1} wires tsawg dua cov xov tsawg thiab teeb tsa dua. Lawv zoo meej rau cov tshuab uas cov ntaub ntawv tsis tas yuav xa thiab tau txais tib lub sijhawm.
Ib qho kev siv ib txwm muaj nyob hauv lub Hoobkas sensor tes hauj lwm. Lub tsheb Hoobkas yuav siv 2-xaim rs485 repeater kom txuas txuas 200 sensors kub thoob plaws tsob ntoo. Qhov rov ua dua tshiab txuas lub teeb liab 4,000 ko taw (1.2 km) thiab ua kom cov ntaub ntawv tseeb thaum txiav cov nqi hlau los ntawm 30%. Lawv tseem ua haujlwm zoo hauv kev ua liaj ua teb itrigrers Ir Agricultural Irrigollers rau cov kev siv hluav taws xob mus rau qhov chaw deb nrog cov ntaub thaiv npog kom tsis txhob cuam tshuam rau kev cuam tshuam. Lwm qhov siv yog cov ntsuas ntsuas ntse, qhov twg RS485 Repeater txuas cov hluav taws xob lossis dej me me rau lub hauv paus.
4-hlau RS485 Repeater: Cov Nta Tseem Ceeb & Kev Thov
Tag nrho -} duplex kom zoo ntawm 4-hlau RS485 rov ua dua tshiab
Tsis zoo li 2 {{{{{4} Tus qauv xaim hlau, ib qho 4} Khis} kem RS485 rau kev xa (R + thiab r-). Qhov no cia nws siv "tag nrho- duplex" kev sib txuas lus-xa thiab tau txais cov ntaub ntawv nyob rau tib lub sijhawm. Qhov no yog qhov sib txawv loj thaum peb saib 4-hlau vs. 2- xaim rs485 rov ua dua tshiab: tag nrho cov roj av tsis muaj ncua los hloov cov qauv.
Qhov 4 {- xaim RS485 Repeater pab txhua cov ntaub ntawv taw qhia nyias. Piv txwv li, hauv lub tshuab tswj, lub koos pij tawj tseem ceeb tuaj yeem xa cov lus txib rau neeg hlau thaum cov neeg hlau xa rov qab raws li cov kev hloov pauv rov qab los, tsis tos. Ntau 4-cov roj hlau ntxiv tseem ua haujlwm nrog RS422, ua yeeb yam raws li converter txuas rau txuas 4-xaim Rs422 khoom siv Rs485. Lawv tseem txhawb cov paib kom txog li 4,000 ko taw thiab ntxiv 32 nodes, ib yam li 2-cov neeg siv xov hlau.
Qhov twg 4-hlau RS485 rov ua kom ci
Wired Rs485 Cov rov ua tau zoo tshaj plaws rau cov tshuab uas xav tau nrawm, tiag {1} {sijhawm sib txuas lus. Muaj cov neeg siv neeg neeg siv neeg siv khoom yog ib qho zoo meej: ib qho kev ua yeeb yam 2,5
Lawv kuj tau siv nyob rau hauv kev soj ntsuam khoom siv kho mob. Nyob rau hauv lub icu, ib 4 {{{4 4}} xaim xaim RS485 Kev Rov Ua Dua Tshiab RS485 Kev Rov Ua Dua Rov Qab Lub plawv, thiab cov zaub hauv nruab nrab. Qhov rov ua kom ntseeg tau tias txhua cov ntaub ntawv {{5} Zoo li lub plawv dhia thiab theem oxygen thiab cov pa oxygen ob txoj kev tam sim no, uas yog qhov tseem ceeb rau cov neeg mob. Lwm qhov kev siv yog nyob rau hauv tiag- lub sij hawm kev ruaj ntseg tshuab, ua tsaug} txhua yam tsis muaj lag luam, ua tsaug rau tag nrho cov rs485 rov ua dua tshiab.
2-hlau vs . 4- xaim RS485 Repeater: sib txawv tseem ceeb
Thaum xaiv ntawm ob, nws yog ib qho tseem ceeb kom sib piv lawv cov yam ntxwv. Cia peb tsoo lub ntsiab sib txawv:
- Kev sib txuas lus hom: Qhov sib txawv loj tshaj plaws yog ib nrab -}} duplex thiab tag nrho- duplex. Ib 2 - xaub RS485 Repeater siv ib nrab ntawm ib nrab xyoo), thaum}} rs485 receater siv tag nrho cov txiv hmab (ob txoj hauv kev). Qhov no hloov cov ntaub ntawv nrawm thiab cov ntaub ntawv txav tau yooj yim.
- Xaim & nqi: 2 {- Cov xov hlau rov qab xav tau tsuas yog ob cov ntaub ntawv xov hlau ntxiv thiab kev teeb tsa ntau dua tab sis yog qhov tsim nyog rau tag nrho-duplex.
- Kev Sib Kis Sib Kis: 4-hlau RS485 rov qab ua dua yog vim tias lawv tsis tos hloov cov qauv me me thaum hloov cov teeb meem tab sis teeb meem rau cov neeg hlau lossis cov iav kho mob.
- Kev sib haum: Feem ntau cov 2-cov neeg hlau cov roj av tsuas yog ua haujlwm nrog RS485 ntxiv} xaim hluav taws xob RS422 (4-xaim) thiab RS485 (ua rau lawv yoog tau ntau dua rau cov tes hauj lwm sib xyaw.
- Raug nodes: Ob qho tib si ntxiv 32 nodes, tab sis 4 {{{{{{{{} Cov xov hlau feem ntau lis cov khoom siv high-cov khoom siv uas yooj yim siv cov ntsuas hluav taws xob yooj yim.
Yuav ua li cas xaiv RS485 Repeater hom
Kev xam tawm Yuav ua li cas xaiv Rs485 Repeater hom pib nrog nug peb cov lus nug yooj yim txog koj lub network.
Ua ntej, koj puas yuav tsum xa thiab tau txais cov ntaub ntawv nyob rau tib lub sijhawm? Yog tias muaj, mus nrog 4 {{- xaub rs485 rov ua dua tshiab. Qhov no yog qhov tseem ceeb rau tiag - lub cav zoo li kev tswj cov neeg hlau lossis kev kho mob. Yog tias koj tsuas yog xav tau cov ntaub ntawv ntawm ib zaug (xws li sensor nyeem), 2-xaim rs485 repeater yog txaus.
Thib ob, deb npaum li cas koj lub network, thiab muaj pes tsawg cov khoom siv? Ob hom receater tshwj xeeb ntev ntev los ntawm 4,000 ko taw (1.2 km) thiab ntxiv 32 nodes. Tab sis yog tias koj muaj lub network ntev ntev (ntau dua 1.2 km), koj tuaj yeem saw ntau cov RS485 rov qab ua ke. Tsuas nco ntsoov: 2-hlau txoj saw yog pheej yig dua los tsim, thaum 4-hlau txuas yog qhov zoo dua rau cov ntaub ntawv ceev.
Peb, koj cov peev nyiaj yog dabtsi? 2-hlau RS485 rov ua tus nqi qis dua upfront thiab txuag ntawm wiring {{2} Tus qauv hlau raug nqi ntau dua tab sis yog tus nqi rau kev nrawm thiab hloov tau. Piv txwv li, ib lub liaj ua liaj ua teb me yuav tuaj yeem xaiv 2-xaim rov ua haujlwm rau dej, thaum lub Hoobkas loj yuav tsum muaj 4-xaim RS485 Receater rau lawv cov kab ke sib dhos.
Tsis tas li, kos ib puag ncig kev xav tau. Yog tias koj RS485 rov ua dua tshiab mus rau hauv lub tsev so lossis lub tsev kub kub, xaiv ib qho uas ua rau muaj kev tiv thaiv ntau dua 40 xyoo. Saib rau kev tsheb nqaj hlau sib tsoo dhau heev-nws yooj yim rau nruab rau hauv kev tswj cov txee.
Cov kev xav kawg ntawm RS485 Receater Qauv
Txawm hais tias koj xaiv ib 2 {{- xaim lossis 4} Khij cov haujlwm RS485 RS485 network muaj zog thiab loj dua. Lub 2-hlau RS485 Repeater zoo rau tus nqi qis, yooj yim xws li sensor tes hauj lwm lossis sensor networks lossis ntse meters. Lub 4-xaim RS485 Repeater yog qhov zoo tshaj plaws rau kev nrawm, lub sijhawm teeb tsa tiag tiag zoo li cov neeg siv hluav taws xob lossis cov iav tsheb kho mob.
Nco ntsoov, qhov zoo tshaj RS485 Receater rau koj qhov project nyob ntawm seb koj xa cov ntaub ntawv, yuav ua li cas nws yuav tsum mus, thiab koj cov peev nyiaj. Los ntawm kev nkag siab txog qhov sib txawv ntawm 2 {{- xaim thiab 4-xaim hom, koj tuaj yeem tsim lub network uas ntseeg tau ntau xyoo. Nco ntsoov khaws tau zoo RS485 rov ua dua tshiab nrog kev tiv thaiv kev sib cais thiab kev tiv thaiv sawv khov - qhov no ua rau koj cov khoom siv tau nyab xeeb thiab koj cov ntaub ntawv ntws zoo.
