Yuav ua li cas siv digital multimeter los ntsuas lub xeev relay
Solid State Relay yog abbreviated li SSR. nws yog ib hom tshiab ntawm kev hloov tsis sib cuag nrog cov khoom siv hluav taws xob nrog kev ua haujlwm txhim khu kev qha, kev hloov ceev ceev thiab lub neej ntev, hloov cov pa relays hauv kev tswj circuits.
Khoom lub xeev relay yog plaub-terminal ntaus ntawv
Ob ntawm INPUT terminals rau cov tswv yim, txuas nrog lub teeb liab tswj, ob lub terminals rau cov zis, txuas nrog lub relay. Cov khoom hauv lub xeev relays tuaj yeem muab faib ua DC thiab AC cov khoom hauv lub xeev relays raws li hom kev thauj khoom, nrog lub zog transistors raws li qhov hloov pauv hauv cov qub thiab bi-directional SCRs raws li qhov hloov pauv nyob rau tom kawg.
AC over-zero type solid state relay txoj cai. Qhov hu ua over-zero hais txog AC voltage yog xoom lossis tsuas yog siab tshaj xoom thaum ua rau SCR, txhawm rau txo qhov cuam tshuam ntawm lub zog hluav taws xob thaum SCR ua. Feem ntau qhov xoom hla qhov hluav taws xob txhais tau tias yog ± 25V, nyob rau hauv cheeb tsam no ntev npaum li lub teeb liab tawm tswv yim, SSR rau, thaum lub zog hluav taws xob ntau dua ± 25V, ntxiv rau cov teeb liab input SSR tsis tam sim ntawd, tsuas yog kom txog thaum lub hwj chim mov. nqes mus rau xoom hla cheeb tsam tom ntej, SSR rau.
Kev kuaj xyuas SSR tuaj yeem ntsuas ntawm nws cov tswv yim nrog lossis tsis muaj DC voltage, DC voltage uas lub teeb liab tawm tswv yim yog qhov qub, thiab tom qab ntawd ntsuas cov zis nrog lossis tsis muaj AC voltage. Yog tias muaj, qhov SSR yog qhov qub, xws li tsis muaj lossis tsis tshua muaj hluav taws xob poob qis, qhia tias cov khoom hauv lub xeev relay puas lawm!
Siv cov digital multimeter diode iav, ①, ②, ③, ④ rau pem hauv ntej thiab thim rov qab ntsuas ntawm cov ntaub ntawv xeem tuaj yeem pom, thaum tus cwj mem liab txuas nrog ① ko taw, tus cwj mem dub txuas nrog ② ko taw, lub 'meter' qhia tau hais tias tus nqi ntawm 1381 (1.381V), kev sib pauv ntawm tus cwj mem los ntsuas lub ntsuas ntsuas qhia cov cim overflow "1"; thaum tus cwj mem liab txuas nrog ④ ko taw, tus cwj mem dub txuas nrog lub sijhawm ③ Thaum tus cwj mem liab txuas nrog tus pin ④, tus cwj mem dub txuas nrog ③, lub ntsuas ntsuas qhia tus nqi ntawm 543 (0. 543V), sib pauv cwj mem ntsuas, qhov ntsuas qhia pom cov cim hla "1"; nyob rau hauv tas li ntawm ob peb lub xeev kev xeem, lub ntsuas qhia tau hais tias lub overflow cim "1". Nws tsis yog qhov nyuaj los txiav txim siab tias: ①, ② ko taw rau DC cov tswv yim ntawm lub cuab yeej nyob rau hauv kev sim, ① taw rau tus ncej zoo, ② taw rau tus ncej tsis zoo, "1.381V" yog lub zog-xeev relay sab hauv lub teeb-emitting diode zoo voltage poob; ③, ④ ko taw rau DC tso zis, ③ ko taw rau tus ncej zoo, ④ taw rau tus ncej tsis zoo, "0.543V "0.543V" yog lub zog pem hauv ntej poob ntawm kev tiv thaiv diode txuas nyob rau hauv parallel ntawm cov zis ntawm lub xeev cov khoom relay Nco ntsoov tias, rau cov khoom hauv lub xeev relay yam tsis muaj kev tiv thaiv diode ntawm cov zis, tsis muaj teeb meem yuav ua li cas los hloov lub meter cwj mem los ntsuas nws ③ thiab ④ ko taw, lub 'meter' yuav tso saib cov cim overflow " 1 ". Thaum siv cov qauv sib txawv ntawm digital multimeter los ntsuas lub teeb-emitting diode ntawm cov khoom-state relay, qee cov twj paj nruag qhia tus nqi ntawm cov ntawv nyeem qee zaum tsuas yog flash tawm ib ntus, thiab tom qab ntawd qhia cov cim overflow "1", ntsib. Nyob rau hauv cov ntaub ntawv no, koj tuaj yeem rov pauv cov cwj mem los ntsuas ob peb zaug kom txog rau thaum qhov kawg ntawm qhov kev xeem!
