1, Hom RS485 cables
RS485 interface feem ntau siv twisted khub cables rau cov ntaub ntawv xa mus. Nyob ntawm qhov kev ncua deb ntawm kev sib kis thiab cov teeb liab yuav tsum tau ua, ntau hom cables tuaj yeem xaiv tau. Hom RS485 hom cable muaj xws li:
Shielded Twisted Pair (STP): STP cables muaj cov hlau thaiv txheej qhwv ib ncig ntawm ob lub teeb liab kab, uas tuaj yeem txo qhov cuam tshuam ntawm electromagnetic cuam tshuam ntawm lub teeb liab. STP cables yog tsim rau ib puag ncig uas muaj kev cuam tshuam loj ntawm electromagnetic los yog kev sib kis mus ntev.
Unshielded Twisted Pair (UTP): UTP cables tsis muaj hlau thaiv txheej thiab kuj pheej yig. Nws yog tsim rau ib puag ncig uas tsis tshua muaj hluav taws xob cuam tshuam los yog kev sib kis luv luv. Txawm li cas los xij, nyob rau hauv ib puag ncig uas muaj zog electromagnetic cuam tshuam, UTP cables yuav ua rau kev sib txuas lus tsis ua haujlwm.
Tsis tas li ntawd, raws li cov ntaub ntawv sib txawv, cov ntaub ntawv rwb thaiv tsev, thiab cov ntaub ntawv sheath ntawm cov cables, lawv tuaj yeem muab faib ua ntau hom cables, xws li tooj liab tub ntxhais PVC insulated PVC sheathed shielded cables, aluminium magnesium hlau braided shielded PVC sheathed cables. , lwm.
2, Txheem rau xaiv RS485 cables
Thaum xaiv RS485 cables, cov qauv hauv qab no yuav tsum tau xav txog:
Kev sib kis nrug: Kev sib kis deb yog qhov tseem ceeb hauv kev xaiv cov cables. Feem ntau hais lus, STP cables tsim nyog rau kev sib kis mus ntev, thaum UTP cables haum rau kev sib kis luv luv. Qhov kev xaiv tshwj xeeb ntawm cable yuav tsum tau sib npaug raws li qhov tseeb kis tau tus mob.
Electromagnetic cuam tshuam: Yog tias muaj qhov cuam tshuam loj ntawm electromagnetic cuam tshuam hauv qhov chaw ua haujlwm, STP cables nrog cov hlau thaiv txheej yuav tsum raug xaiv. Txwv tsis pub, electromagnetic cuam tshuam yuav muaj kev cuam tshuam loj rau lub teeb liab, ua rau kev sib txuas lus tsis ua haujlwm.
Cov teeb liab zoo: Cov teeb liab zoo yog qhov taw qhia tseem ceeb rau kev ntsuas kev ua haujlwm cable. Cov kab hluav taws xob zoo tuaj yeem muab cov teeb liab ruaj khov dua, txo cov teeb liab attenuation thiab suab nrov cuam tshuam. Yog li ntawd, thaum xaiv cables, yuav tsum tau them nyiaj mloog mus rau qhov zoo ntawm lawv cov ntaub ntawv conductor, rwb thaiv tsev ntaub ntawv, thiab sheath ntaub ntawv.
Nqi: Tus nqi ntawm ntau hom cables sib txawv heev. Ntawm qhov chaw ua tau raws li qhov yuav tsum tau muaj ntawm kev sib kis, kev cuam tshuam ntawm electromagnetic, thiab cov teeb liab zoo, cov hom cable tsim nyog yuav tsum raug xaiv raws li qhov xav tau tiag tiag thiab nyiaj txiag.
3, Cov yam ntxwv uas yuav tsum tau xav txog nyob rau hauv ntau yam kev thov scenarios
Hauv cov xwm txheej sib txawv ntawm cov ntawv thov, ntau yam yuav tsum tau txiav txim siab thaum xaiv RS485 cables. Piv txwv li:
Industrial automation: Hauv kev lag luam automation, cov cuab yeej siv dav dav thiab kev sib kis yuav ntev dua. Lub caij no, tej zaum yuav muaj qhov cuam tshuam ntawm electromagnetic cuam tshuam hauv lub Hoobkas ib puag ncig. Yog li ntawd, nws yog qhov tsim nyog xaiv STP cables nrog hlau thaiv txheej.
Kev saib xyuas tej thaj chaw deb: Kev saib xyuas tej thaj chaw deb feem ntau xav tau cov ntaub ntawv xa mus ntev. Nyob rau hauv cov ntaub ntawv no, STP cables nrog kev ruaj ntseg kis tau tus mob yuav tsum tau xaiv los xyuas kom meej kev ruaj ntseg teeb liab kis tau tus mob.
Lub tsev automation: Hauv lub tsev automation systems, cov khoom siv faib khoom yog qhov tseem ceeb thiab kev sib kis tau luv luv. Meanwhile, lub tsev ib puag ncig yog nyob ze, nrog tsawg electromagnetic cuam tshuam. Yog li ntawd, tus nqi qis dua UTP cables tuaj yeem xaiv.
Hauv cov ntsiab lus, xaiv qhov tsim nyog RS485 cable yog qhov tseem ceeb rau kev ua kom muaj kev ruaj ntseg thiab kev ntseeg siab ntawm kev sib txuas lus. Thaum xaiv cov cables, nws yuav tsum ua tib zoo xav txog yam xws li kev sib kis deb, kev cuam tshuam ntawm electromagnetic, teeb liab zoo, thiab tus nqi. Nyob rau tib lub sijhawm, kev saib xyuas yuav tsum tau them nyiaj rau qhov zoo ntawm cov khoom siv hluav taws xob, cov ntaub ntawv rwb thaiv tsev, thiab cov ntaub ntawv sheath ntawm cov cables kom ntseeg tau tias lawv ua tau raws li qhov yuav tsum tau ua.
