Intermediate Relay nyob rau hauv PLC Tswj System: Qhov tseem ceeb Wiring Guide 2026

Thaum koj tsim PLC tswj qhov system, koj ntsib qhov kev txiav txim siab tseem ceeb. Koj txuas PLC cov txiaj ntsig digital li cas rau -cov khoom siv hauv ntiaj teb tiag? Qhov kev sib tw yog qhov tseeb: koj yuav tsum muaj kev ruaj ntseg txuas qhov sib txawv ntawm qhov qis - lub zog, cov khoom siv hluav taws xob zoo ntawm PLC thiab lub siab - lub zog, hluav taws xob nrov hauv ntiaj teb ntawm cov motors, solenoids, thiab teeb.

Qhov kev daws teeb meem yog ib qho tseem ceeb hauv kev hu ua intermediate relay. Xav txog cov cuab yeej no yog qhov tseem ceeb "tus neeg saib xyuas" rau koj lub PLC cov zis module. Nws tsis yog ib qho ntxiv - rau. Nws yog lub hauv paus ntawm kev tshaj lij tswj vaj huam sib luag tsim.

Kev siv lub nruab nrab relay yog qhov kev coj ua zoo tshaj plaws. Nws pab koj tsim kom muaj zog, nyab xeeb, thiab tswj tau yooj yim automation systems. Nws tus nqi yog los ntawm peb cov txiaj ntsig tseem ceeb uas peb yuav tshawb xyuas kom meej.

Kev cais tawm

Load amplification

PLC tso zis tiv thaiv

Intermediate Relay yog dab tsi?

Ib qho nruab nrab relay yog ib qho tseem ceeb ntawm kev sib cuam tshuam hauv PLC tswj qhov system. Qee tus neeg hu nws lub interposing relay lossis tswj relay. Nws ua haujlwm raws li kev hloov hluav taws xob uas txhais tau hais tias qis - lub zog hluav taws xob los ntawm PLC mus rau qhov siab - lub zog ua haujlwm hauv thaj chaw.

PLC's Heavy-Tus Pabcuam Ua Haujlwm

Ntawm no yog ib qho piv txwv yooj yim los piav qhia nws txoj haujlwm. Xav tias PLC tso zis yog koj tus ntiv tes. Nws tuaj yeem nias lub pob me me nrog lub zog tsawg. Qhov nruab nrab relay yog lub tshuab uas khawm no qhib.

Cov txheej txheem no muaj lub zog los koom nrog lub oob khab rau lub cev muaj zog loj. Koj tus ntiv tes tsis tuaj yeem pib lub cev muaj zog ncaj qha. Tab sis nws tuaj yeem yooj yim thiab nyab xeeb tswj cov cuab yeej uas ua tau.

Qhov nruab nrab relay yog ib qho hluav taws xob lossis khoom siv hluav taws xob- lub xeev hloov. Nws siv lub zog me me los ntawm PLC cov zis los tswj qhov sib cais tag nrho thiab feem ntau ntau dua - lub zog hluav taws xob hluav taws xob.

Ntsiab Relay Cheebtsam

Tus qauv ntsaws- hauv nruab nrab relay muaj ob peb yam tseem ceeb uas ua haujlwm ua ke. Cov no muaj ntau hauv cov tswj vaj huam sib luag.

Coil: Qhov no yog sab input ntawm lub relay. Thaum koj energize nws nrog qhov tseeb voltage los ntawm PLC tso zis, nws tsim ib tug magnetic teb.

Hu rau: Qhov no yog qhov tso zis hloov sab. Lub magnetic teb los ntawm energized kauj txav ib tug mechanism uas lub cev qhib los yog kaw cov kev sib cuag. Lawv suav nrog Common (C), Nquag Qhib (NO), thiab Nquag Kaw (NC) terminals.

Base/Socket: Lub tsev no txuas ncaj qha mus rau DIN rail nyob rau hauv lub vaj huam sib luag tswj. Nws muaj cov ntsia hlau terminals rau kev xaim thiab tso cai rau cov relay txuas los yog tshem tawm yam tsis tau kov cov xaim. Qhov no ua rau kev hloov pauv yooj yim.

Relay vs. Output vs. Contactor

Cov kws tshaj lij tshiab feem ntau tsis meej pem thaum sib txawv ntawm PLC cov zis sab hauv, ib qho nruab nrab relay, thiab lub zog loj dua contactor. Txhua tus muaj lub luag haujlwm thiab muaj peev xwm.

Peb Qhov Tsis Muaj -Pillar Negotiable

Peb hu rau lub luag haujlwm tseem ceeb ntawm qhov nruab nrab relay peb tus ncej ntawm kev tshaj lij PLC cuam tshuam. Kev nkag siab txog cov no qhia tias vim li cas lawv yog cov khoom tseem ceeb hauv kev tsim kev tswj hwm loj.

Pillar 1: Teeb liab cais

Lub luag haujlwm tseem ceeb tshaj plaws ntawm qhov nruab nrab relay yog muab galvanic cais tawm. Qhov no txhais tau hais tias tsis muaj kev ncaj qha hluav taws xob nruab nrab ntawm Circuit Court tswj lub relay coil (PLC) thiab lub Circuit Court raug hloov los ntawm kev sib cuag relay (lub load).

Qhov kev sib txawv ntawm huab cua lossis kev sib cais ntawm lub cev no yog lub cuab yeej muaj zog rau kev ua haujlwm ruaj khov thiab kev nyab xeeb hluav taws xob.

Lub load sab ntawm ib qho system tuaj yeem yog qhov chaw hluav taws xob tsis zoo. Nws suav nrog cov motors, hloov pauv zaus tsav, thiab solenoid li qub. Cov khoom siv no tuaj yeem tsim hluav taws xob tseem ceeb, hluav taws xob nrov, thiab siab - zaus zaus rov qab mus rau cov kab hluav taws xob.

Yog tsis muaj qhov nruab nrab relay, lub suab nrov hluav taws xob no yuav rov qab ncaj qha mus rau hauv PLC lub rhiab tawm daim npav. Qhov no tuaj yeem ua rau tus cwj pwm tsis zoo lossis kev puas tsuaj mus tas li. Lub relay ua raws li qhov tsis muaj zog uas nqus cov kev cuam tshuam no.

Lwm qhov teeb meem tseem ceeb hauv cov tshuab loj yog lub peev xwm rau hauv av loops. Thaum PLC thiab cov cuab yeej siv hluav taws xob tau siv los ntawm ntau qhov chaw lossis nyob deb ntawm lub cev, lawv "hauv av" lossis 0V cov ntsiab lus siv yuav nyob ntawm qhov sib txawv me ntsis hluav taws xob.

Txuas lawv ncaj qha tuaj yeem ua rau cov dej tsis xav tau ntws. Qhov no ua rau muaj kev cuam tshuam tsis zoo. Vim hais tias cov relay lub coil thiab kev sib cuag circuits raug cais tawm, nws rhuav tshem cov voj voog hauv av thiab ua kom cov teeb liab huv si.

Feem ntau siv cov ntaub ntawv yog interfacing txawv voltage theem. PLC tswj qhov system yuav luag ib txwm ua haujlwm ntawm 24V DC rau nws cov laj thawj. Txawm li cas los xij, cov khoom siv uas nws xav tau los tswj feem ntau khiav ntawm 120V AC lossis 230V AC. Cov no suav nrog cov pib lub cev muaj zog, lub twj tso kua mis, lossis lub teeb pom kev loj.

Ib qho nruab nrab relay ua rau qhov kev txhais lus no yooj yim thiab nyab xeeb. Lub 24V DC PLC tso zis energizes lub relay 24V DC kauj. Lub relay tus neeg raug ntsuas rau qhov siab dua voltage. Tom qab ntawd lawv muaj kev nyab xeeb hloov 120V AC lub zog rau lub nra.

Pillar 2: Load Amplification

PLC tso zis modules yog tsim los rau kev taw qhia, tsis yog rau kev xa hluav taws xob. Lawv cov kev hloov pauv sab hauv feem ntau yog cov transistors. Cov no yog me me thiab muaj kev txwv tam sim no - tuav peev xwm.

Tus qauv PLC transistor tso zis yuav raug ntsuas rau tsuas yog 0.5A. Nyob rau hauv sib piv, lub kauj ntawm ib tug me me lub cev muaj zog contactor yuav muaj ib tug inrush tam sim no ntawm 2A los yog ntau tshaj rau ob peb milliseconds thaum nws thawj energizes.

Txuas tus contactor coil no ncaj qha mus rau PLC cov zis yuav tsim ib qho kev mob overcurrent. Qhov no yuav instantly rhuav tshem cov zis transistor. Nws yuav ua rau cov zis channel ntawm PLC module mus tas li tsis muaj txiaj ntsig.

Lub nruab nrab relay ua haujlwm raws li lub suab nrov tam sim no. Nws siv lub teeb liab me me heev los ntawm PLC los txhawb nws lub kauj. Qhov no feem ntau tsawg li 15mA (0.015A).

Hauv kev teb, nws cov neeg sab hauv tuaj yeem hloov pauv qhov tam sim no loj dua. Qhov no feem ntau yog nyob rau hauv thaj tsam ntawm 5A txog 10A. Qhov no txuas rau qhov sib txawv ntawm lub zog tseem ceeb ntawm PLC lub teeb liab thiab qhov kev xav tau ntawm kev thauj khoom.

Nws kuj tseem ceeb heev kom nkag siab qhov sib txawv ntawm cov khoom thauj khoom. Ib qho hluav taws xob tiv thaiv muaj qhov ntsuas tau thiab ruaj khov tam sim no kos. Piv txwv muaj xws li ib lub rhaub yooj yim los yog lub teeb incandescent.

Ib qho inductive load yog qhov xav tau ntau dua. Piv txwv xws li lub cev muaj zog, solenoid, lossis contactor coil. Cov loads no muaj cov hlau nplaum sib nqus uas ua rau muaj kev kub ntxhov tam sim no thaum muaj zog. Lawv kuj nthuav tawm lwm cov kev cov nyom thaum de- zog. Cov kev sib cuag muaj zog ntawm qhov nruab nrab relay yog tsim los tswj cov kev nruj ntawm kev hloov cov inductive loads.

Pillar 3: Sacrificial Protection

Los ntawm qhov ua tau zoo thiab nyiaj txiag, qhov nruab nrab relay ua haujlwm raws li kev pov hwm pheej yig rau koj cov khoom siv PLC kim. Qhov no yog ib qho ntawm cov lus sib cav tshaj plaws rau lawv siv.

Xav txog tus nqi. Tus qauv ntsaws- nyob rau hauv nruab nrab relay thiab nws lub hauv paus yuav raug nqi ntawm $10 thiab $20. Kev hloov 16-point digital output module rau PLC hom loj tuaj yeem yooj yim raug nqi $ 300 txog $ 500, lossis ntau dua.

Yog tias muaj teeb meem tshwm sim, qhov nruab nrab relay yuav yog cov khoom ua tsis tiav. Piv txwv muaj xws li luv luv Circuit Court nyob rau hauv lub teb thaiv los yog ib tug load tsis ua hauj lwm. Nws yog ib txoj haujlwm yooj yim, ceev, thiab pheej yig kom tshem tawm cov relay ua tsis tiav thiab ntsaws ib qho tshiab. Yog tsis muaj nws, qhov ua tsis tiav yuav rhuav tshem cov channel ntawm PLC module. Qhov no yuav tsum tau them nyiaj ntau dua thiab sijhawm - siv hloov pauv.

Tus naj npawb ib tus neeg tua neeg uas ntsiag to ntawm PLC DC tso tawm yog qhov tshwm sim hu ua inductive kickback, lossis rov qab EMF.

Thaum koj siv lub DC voltage rau ib qho inductive coil, lub magnetic teb tsim. Piv txwv muaj xws li lub kauj ntawm lub relay lossis solenoid. Thaum koj tshem tawm qhov voltage, lub magnetic teb vau sai. Qhov no collapsing teb induces ib tug voltage spike nyob rau hauv lub rov qab kev taw qhia nyob rau hauv lub kauj. Nws tuaj yeem ncav cuag ntau pua lossis ntau txhiab volts rau ib microsecond.

Qhov siab -voltage spike no rov qab mus rau PLC cov zis uas yog tswj cov kauj. Nws tuaj yeem tsoo cov khoom siv semiconductor me me ntawm cov hloov pauv hloov hauv PLC module, rhuav tshem nws.

Ib qho nruab nrab relay tso cai rau peb kom yooj yim ntxiv ib qho kev tiv thaiv yooj yim. Peb tso lub flyback diode ncaj qha hla lub relay lub coil terminals kom muaj kev nyab xeeb dissipate lub zog no. Qhov no tiv thaiv PLC, uas yog lub hom phiaj tseem ceeb.

Thaum kawg, tag nrho cov cuab yeej siv tshuab muaj lub neej ntev. Ib tug relay yog ntsuas rau qee tus lej ntawm kev hloov mus. Nyob rau hauv ib daim ntawv thov siab - zaus, ib tug relay yuav ploj tom qab ob peb xyoos ntawm kev pab cuam.

Nws yog qhov yooj yim dua thiab tus nqi ntau dua - zoo los hloov $ 15 ntsaws- nyob rau hauv relay dua li hloov tag nrho PLC module. PLC module yuav muaj nws cov khoom tso tawm ncaj qha mus rau lub rooj tsav xwm Circuit Court. Lub relay yog tsim los ua ib qho khoom siv, khaws cia.

Phau Ntawv Qhia rau Kev Xaiv Relay

Tsiv ntawm txoj kev xav mus rau kev xyaum yuav tsum xaiv qhov tseeb nruab nrab relay rau koj daim ntawv thov tshwj xeeb. Peb mus txog qhov no raws li kev ua haujlwm, plaub-qhia kev txiav txim siab- ua cov txheej txheem kom tsis txhob ua yuam kev ntau thiab raug nqi ntau.

Kauj Ruam 1: Sib piv cov kauj rau PLC

Thawj kauj ruam yog los xyuas kom meej cov relay input (lub kauj) yog sib xws nrog PLC cov zis.

Lub kauj hluav taws xob ntawm lub relay yuav tsum phim cov zis hluav taws xob ntawm koj PLC. Nyob rau hauv niaj hnub tswj systems, qhov no yog overwhelmingly 24V DC. Txawm li cas los xij, koj yuav tsum txheeb xyuas qhov no ntawm koj PLC module cov ntaub ntawv. Siv 12V DC relay nrog 24V DC tso zis yuav hlawv tawm lub kauj. Qhov rov qab yuav ua tsis tau nws.

Koj kuj yuav tsum tau xyuas qhov kos tam sim no ntawm lub relay coil. Tus nqi no muaj nyob rau ntawm cov ntaub ntawv relay. Nws feem ntau qis heev (piv txwv li, 10-50mA). Xyuas kom meej tias PLC cov zis qhov siab tshaj plaws tam sim no ntsuas yog siab tshaj qhov coil qhov kos tam sim no.

Kauj ruam 2: Sib cuag hu rau Load

Tom ntej no, koj yuav tsum xyuas kom meej lub relay tso zis (cov neeg sib cuag) muaj kev ruaj ntseg tuav lub cuab yeej koj npaj siab yuav tswj.

Cov kev sib cuag relay yuav muaj qhov ntsuas qhov siab tshaj plaws. Piv txwv li 250V AC lossis 30V DC. Qhov voltage ntawm koj lub load Circuit Court yuav tsum tsis txhob tshaj qhov ntsuas no.

Xam qhov siab tshaj plaws ruaj khov- lub xeev tam sim no koj lub nra yuav kos. Tom qab ntawd, nrhiav tus relay qhov kev ntsuas tam sim no. Peb pom zoo kom xaiv ib lub relay nrog kev sib cuag nrog tsawg kawg yog 50% siab dua li qhov koj xav tau. Qhov no muab kev nyab xeeb kev ua haujlwm tsis zoo thiab txuas ntxiv lub neej ntawm relay.

Ua tib zoo mloog cov lus qhia tshwj xeeb. Kev sib tiv tauj feem ntau sib txawv rau AC thiab DC circuits. Kev tiv tauj rau 10A ntawm 120V AC tsuas yog ntsuas rau 2A ntawm 24V DC. Qhov no yog vim tias DC arc yog qhov nyuaj rau kev tua ntau dua li AC arc thaum cov neeg sib cuag qhib. Qhov no ua rau kom hnav ntau dua.

Kauj Ruam 3: Txiav txim siab daim ntawv tiv tauj

Koj yuav tsum xaiv txoj cai hu rau configuration rau koj Circuit Court lub logic.

TSIS MUAJ (Nquag Qhib): Txoj hauv kev hauv Circuit Court los ntawm relay qhib thaum lub kauj yog de-energized. Txoj kev kaw thaum lub kauj yog energized. Qhov no yog qhov feem ntau configuration rau tig ib tug ntaus ntawv.

NC (Nquag Kaw): Txoj kev hauv Circuit Court raug kaw thaum lub kauj yog de{0}}energized. Txoj kev qhib thaum lub kauj yog energized. Qhov no muaj txiaj ntsig rau kev ua tsis tiav -kev nyab xeeb logic lossis tua lub cuab yeej.

SPDT (Ib Tug Ncej Ob Qhov Ncauj): Qhov no muab ib lub davhlau ya nyob twg (C) uas hloov ntawm ib qho tsis muaj thiab ib qho NC hu. Nws tseem hu ua "kev hloov pauv" kev sib cuag. Nws muaj txiaj ntsig zoo rau kev sib tw ntawm ob lub voj voog sib txawv lossis lub xeev.

DPDT (Double Ncej Ob Qhov Ncauj): Qhov no muab ob qho kev ywj pheej ntawm SPDT kev sib cuag uas yog ob qho tib si tswj los ntawm tib lub kauj. Qhov no zoo li muaj ob relays hauv ib pob. Nws muaj txiaj ntsig zoo rau kev hloov pauv ob qho tib si nyob thiab nruab nrab ntawm AC Circuit Court, lossis rau kev tswj ob lub voj voog sib cais ib txhij.

Kauj Ruam 4: Xav txog cov yam ntxwv ntawm lub cev

Thaum kawg, xav txog cov qauv ntawm lub cev thiab kev siv tau zoo uas yooj yim rau kev teeb tsa thiab kev daws teeb meem.

Cov txheej txheem kev lag luam yog siv cov relay uas ntsaws rau hauv DIN rail mountable sockets. Qhov no tso cai rau kom huv si, ruaj ntseg mounting nyob rau hauv ib tug tswj vaj huam sib luag. Nws hloov lub cuab yeej -dawb, 10-thib ob txoj haujlwm.

Peb pom zoo kom xaiv cov relays lossis cov hauv paus uas suav nrog qhov ntsuas LED ua ke. Lub teeb me me no muab kev pom tseeb tam sim ntawm lub kauj qhov xwm txheej. Nws qhia koj ntawm ib nrais muag seb lub PLC tab tom hais kom lub relay nyob rau lossis tawm. Nws yog invaluable thaum commissioning thiab teeb meem.

Qee cov relays muaj lub pob ntsuas phau ntawv lossis lub ntsuas phoo. Qhov no tso cai rau tus kws tshaj lij los ua haujlwm ntawm tus relay los ntsuas lub load- sab xaim yam tsis tas yuav tsum muaj PLC program ua haujlwm. Qhov no tuaj yeem yog lub sijhawm tseem ceeb-txuag thaum lub kaw lus kaw.

Wiring Demystified

Kev xaim hluav taws xob nruab nrab hauv PLC tswj qhov system yog qhov kev txawj ntse tseem ceeb. Nws suav nrog ob lub voj voog sib txawv: qhov qis - voltage tswj sab los ntawm PLC thiab feem ntau siab dua -voltage load sab. Peb yuav muab cov kauj ruam -los ntawm- cov lus qhia kauj ruam los ua kom cov kev sib txuas no muaj kev nyab xeeb thiab raug.

Kev Nyab Xeeb Thawj: LOTO

Ua ntej kov cov xaim, koj yuav tsum ua raws li cov txheej txheem Lockout / Tagout (LOTO) kom raug. Txhua qhov chaw hluav taws xob mus rau lub vaj huam sib luag tswj yuav tsum yog de-energized, txheeb xyuas kom tawm, thiab kaw rau hauv txoj haujlwm tawm. Qhov no suav nrog ob qho tib si tswj thiab load zog. Nov yog thawj kauj ruam tseem ceeb tshaj plaws hauv kev ua haujlwm hluav taws xob.

Sab Tswj: Coil Wiring

Kev xaim hluav taws xob xa hluav taws xob rau PLC yuav tsum nkag siab seb koj PLC cov zis module yog dab dej lossis hom khoom. Qhov no yog lub hauv paus ntawm kev tsis meej pem thiab kev xaim tsis raug. Ntau ntawm peb tau siv sij hawm ntxhov siab los daws qhov teeb meem ntawm lub voj voog nkaus xwb kom paub tias qhov sib txawv tau raug xaim rau hom tso zis tsis raug.

Sourcing outputs (PNP hom) muab, los yog "qhov chaw," +24V DC rau lub load. Sinking outputs (NPN hom) muab txoj hauv kev rau 0V DC, lossis "lub dab dej," tam sim no los ntawm kev thauj khoom.

[Daim duab 1: Kev xa xov rau kev xa khoom (PNP) tso zis. Ib lub xov hlau khiav los ntawm PLC lub qhov hluav taws xob cov zis tawm mus rau lub relay lub A1 coil davhlau ya nyob twg. Ib tug nyias nyias khiav los ntawm relay lub A2 coil davhlau ya nyob twg mus rau 0V DC fais fab mov kev tsheb ciav hlau.]

Rau cov khoom siv (PNP) cov zis, koj txuas lub PLC tso zis davhlau ya nyob twg ncaj qha mus rau A1 (zoo) davhlau ya nyob twg ntawm relay coil. Tom qab ntawd koj txuas lub A2 (tsis zoo) davhlau ya nyob twg ntawm relay coil mus rau 0V DC lub tsheb npav.

[Daim duab 2: Kev xaim rau lub dab dej (NPN) tso zis. Ib tug xaim khiav ntawm +24V DC fais fab mov rail mus rau relay lub A1 coil davhlau ya nyob twg. Ib lub xov hlau cais khiav los ntawm relay's A2 coil davhlau ya nyob twg mus rau PLC's digital output terminal.]

Rau lub dab dej (NPN) tso zis, cov xaim yog thim rov qab. Koj txuas lub +24V DC fais fab mov mus rau A1 lub davhlau ya nyob twg ntawm lub relay kauj. Tom qab ntawd koj txuas A2 lub davhlau ya nyob twg ntawm lub kauj mus rau PLC cov zis davhlau ya nyob twg.

Sab Load: Hu rau Wiring

Lub load sab thaiv yog ywj siab ntawm kev tswj sab. Ntawm no, koj tsuas yog hla lub zog los ntawm kev hloov pauv kev sib cuag rau koj lub cuab yeej.

Peb yuav siv qhov piv txwv ntawm kev hloov lub teeb 120V AC siv qhov Nquag Qhib (NO) tiv tauj.

[Daim duab 3: Txuas 120V AC Load. Ib lub xov hlau khiav los ntawm 120V AC Live / Kub Circuit Court breaker mus rau relay's Common (C) tiv tauj davhlau ya nyob twg. Ib tug thib ob xaim khiav los ntawm relay lub Nquag Qhib (NO) tiv tauj lub davhlau ya nyob twg mus rau ib lub davhlau ya nyob twg ntawm lub teeb. Ib txoj hlua kawg khiav los ntawm lwm lub davhlau ya nyob twg ntawm lub teeb mus rau 120V AC Neutral tsheb npav bar.]

Hauv qhov teeb tsa no, 24V DC tswj Circuit Court thiab 120V AC load Circuit Court raug cais tawm tag nrho. Lawv tsuas yog txuas nrog lub magnetic teb nyob rau hauv lub relay. Qhov no yog lub ntsiab ntawm kev sib cais.

Qhov tseem ceeb Diode

Raws li tau tham dhau los, kev tiv thaiv PLC qhov rhiab DC tso zis los ntawm relay coil lub inductive kickback yog qhov tseem ceeb. Qhov no yog ua tiav los ntawm kev ntxiv ib lub flyback diode.

Qhov no diode yog xaim nyob rau hauv parallel nrog relay lub DC coil terminals (A1 thiab A2). Nws yog ib qho tseem ceeb uas nws tau nruab rau hauv kev tsis ncaj ncees.

[Daim duab 4: Qhia Flyback Diode Placement. Ib lub diode me me, xws li 1N4001, tau pom kev sib txuas thoob plaws A1 thiab A2 terminals ntawm lub hauv paus relay. Lub cathode, lossis striped kawg, ntawm lub diode txuas nrog A1 davhlau ya nyob twg (qhov zoo tshaj plaws). Lub anode, lossis tsis yog - striped kawg, txuas nrog A2 davhlau ya nyob twg (qhov ntau qhov tsis zoo).]

Cov kab txaij kawg ntawm lub diode (cathode) yuav tsum txuas mus rau sab zoo ntawm lub kauj voj voog. Qhov tsis yog - striped kawg (anode) txuas mus rau sab tsis zoo.

Ceev faj heev. Yog hais tias lub diode raug ntsia rov qab, nws yuav tsim ib qho luv luv Circuit Court los ntawm lub hwj chim mov mus rau hauv av sai li sai tau thaum lub PLC tso zis. Qhov no tej zaum yuav tshuab lub fuse los yog puas lub hwj chim mov.

Ib Cornerstone ntawm Design

Hauv kev xaus, siv qhov nruab nrab relay hauv PLC tswj qhov system tsis yog qhov teeb meem tsis tsim nyog. Nws yog lub cim ntawm tus kws tshaj lij, xa mus rau -xav tus tsim qauv uas nkag siab qhov tseeb ntawm ib puag ncig kev lag luam.

Txawm hais tias nws yuav zoo li yog ib qho kev tivthaiv ntxiv thiab cov kauj ruam ntxiv hauv kev tsim thiab thaiv cov txheej txheem, cov txiaj ntsig tau dhau los. Nws yog ib qho kev nqis peev me me uas them cov nyiaj faib loj tshaj lub neej ntawm lub tshuab.

Los ntawm kev sib koom ua ke ib qho nruab nrab relay, koj tab tom tsim ib lub holistic system uas ua ntej PLC tswj, teeb liab cais, nruab nrab relay, hluav taws xob kev nyab xeeb. Nws muaj kev nyab xeeb dua vim muaj hluav taws xob cais tawm. Nws yog ntau txhim khu kev qha vim lub suab nrov tiv thaiv. Thiab nws yooj yim dua thiab pheej yig dua los tswj. Cov kev coj ua zoo tshaj plaws no cais cov qauv tsis yooj yim los ntawm kev daws teeb meem automation uas yuav ua rau qhov kev sim ntawm lub sijhawm.

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