Nyob rau hauv ib qho chaw muaj kev lag luam, muaj peev xwm muaj ntau yam teeb meem, thiab kev txhim kho thiab kev xaim hluav taws xob yog qhov tseem ceeb rau kev ruaj ntseg hauv kev tsim khoom.Los ntawm cov ntaub ntawv kawm niaj hnub no, peb yuav tshawb xyuas ua ke yuav ua li cas kom muaj kev nyab xeeb hauv kev tsim khoom.
1. Kev piav qhia txog qhov teeb meem
Ib tus neeg siv khoom davhlau ya nyob twg tau siv 485 kev sib txuas lus module CT-5321 rau kev sib txuas lus nrog zaus inverter.Lawv tau ntsib qhov xwm txheej uas rau 6 daim npav sib txuas lus hauv qhov zaus inverter hlawv tawm ua ntu zus.Tom qab hloov daim npav inverter rau lub sijhawm (txhua lub sijhawm ua rau burnout), CT-5321 kev sib txuas lus module nws tus kheej hlawv tawm rau lub sijhawm thib rau.
Txhawm rau tiv thaiv cov neeg siv khoom poob ntxiv, ODOT engineers tau mus xyuas qhov chaw los pab daws teeb meem.
2. Kev daws teeb meem ntawm qhov chaw
Tom qab ua tib zoo soj ntsuam thiab tshuaj xyuas los ntawm cov engineers ntawm qhov chaw, cov teeb meem hauv qab no tau txheeb xyuas:
(1) Muaj 14 lub txee tswj nyob rau ntawm qhov chaw, txhua qhov muaj ob zaus inverters thiab ib lub zog ntsuas uas xav tau kev sib txuas lus nrog CT5321.
(2) GND ntawm zaus inverter txuas nrog cov txheej thaiv thaiv ntawm cov kab teeb liab.
(3) Thaum kuaj xyuas cov xaim ntawm qhov zaus inverter, nws tau pom tias qhov kev sib txuas lus hauv av thiab hauv av inverter tsis sib cais.
(4) Cov ntaub thaiv npog ntawm RS485 teeb liab kab tsis txuas rau hauv av.
(5) RS485 kev sib txuas lus davhlau ya nyob twg resistors tsis txuas.
3. Ua rau Analysis
Raws li kev soj ntsuam thiab kev tsom xam ntawm qhov xwm txheej ntawm qhov chaw, tus kws tshaj lij tau muab cov lus pom hauv qab no:
(1) Cov khoom puas thiab cov qauv tsis pom cov cim ntawm kev puas tsuaj ntawm electrostatic paug (ESD) lossis surge.Tsis zoo li ESD lossis kev puas tsuaj, uas feem ntau tsis ua rau cov khoom tawg, cov khoom siv hluav taws kub hauv CT-5321 tau cuam tshuam nrog RS485 chaw nres nkoj electrostatic tiv thaiv ntaus ntawv.Cov cuab yeej no feem ntau muaj DC tawg voltage ntawm ib ncig ntawm 12V.Yog li ntawd, nws tau txiav txim siab tias qhov hluav taws xob ntawm lub tsheb npav RS485 tau tshaj 12V, tej zaum vim yog kev taw qhia ntawm 24V fais fab mov.
(2) Lub tsheb npav RS-485 muaj ntau yam khoom siv hluav taws xob siab thiab lub zog ntsuas.Thaum tsis muaj kev sib cais kom raug thiab hauv av, cov cuab yeej no tuaj yeem tsim qhov sib txawv tseem ceeb.Thaum qhov sib txawv ntawm qhov muaj peev xwm thiab lub zog muaj ntau, nws tuaj yeem tsim lub voj voog ntawm RS485 teeb liab kab, ua rau kev puas tsuaj ntawm cov khoom siv raws lub voj no.
4. Kev daws teeb meem
Hauv kev teb rau cov teeb meem ntawm qhov chaw, ODOT engineers tau npaj cov kev daws teeb meem hauv qab no:
(1) Tshem tawm cov teeb liab thaiv txheej los ntawm inverter GND thiab txuas nws cais rau hauv av teeb liab.
(2) Hauv pem teb cov cuab yeej inverter, cais cov teeb liab hauv av, thiab xyuas kom muaj av zoo.
(3) Ntxiv terminal resistors rau RS485 kev sib txuas lus.
(4) Txhim kho RS-485 kev sib cais ntawm cov khoom siv ntawm lub tsheb npav RS-485.
5. Rectification daim duab
Kev ua raws li cov kev ntsuas ntsuas saum toj no tuaj yeem tiv thaiv cov teeb meem zoo sib xws los ntawm kev tshwm sim dua, ua kom muaj kev txaus siab thiab kev nyab xeeb ntawm cov neeg siv khoom.
Nyob rau tib lub sijhawm, ODOT tseem ceeb rau cov neeg siv khoom kom xyuam xim rau cov teeb meem zoo sib xws hauv kev tsim thiab kev saib xyuas ntawm kev sib txuas lus, ntxiv dag zog rau cov khoom siv tu thiab kev tswj hwm, thiab xyuas kom muaj kev ruaj ntseg thiab kev ntseeg siab ntawm lub system.
Post lub sij hawm: Feb-01-2024
