Ingcupho yenzwa engu-89448-34020 yeToyota Automobile Parts

1. Ukuxhumana okukude

Okwamanje (4 kuye ku-20 MA) yisixhumi esibonakalayo se-analog esithandwayo lapho sidlulisela imininingwane ngebanga elide. Lokhu kungenxa yokuthi umphumela we-voltage utholakala kakhulu ekuphazanyisweni komsindo, futhi isiginali uqobo izofakwa ukumelana ngentambo. Kodwa-ke, okukhishwayo kwamanje kungakwazi ukumelana amabanga amade futhi kunikeze ukufundwa kwengcindezi okuphelele futhi okunembile kusuka ku-Transmitter ohlelweni lokutholwa kwedatha.

2. Ukuphambuka ekuphazanyisweni kwe-RF

Imigqa yekhebula isengozini ye-Electromagnetic (EMI) / Radio Frequency (RFI) / I-Electrostatic (ESD) ukuphazamiseka kwezintambo eziseduze nemigqa. Lo msindo kagesi ongadingekile uzodala ukulimala okukhulu kwezimpawu eziphakeme zokubulawa kwezimpawu ezinjengezimpawu ze-voltage. Le nkinga inganqotshwa kalula ngokusebenzisa ukubulawa okuphansi kanye namasiginali aphezulu aphezulu, njenge-4-20 Ma.

3, Ukuxazulula inkinga

Isiginali ye-4-20 Ma20 inomphumela we-4 MA kanye nenani lokucindezela yi-zero. Lokhu empeleni kusho ukuthi isiginali ine- "Live Zero", ngakho-ke noma ngabe ukufundwa kwengcindezi kungu-zero, kuzodla ama-4 ma we-24 wamanje. Uma isinali liyehla ku-0 ma, lo msebenzi unganikeza umsebenzisi ngokubonisa okucacile kwephutha lokufunda noma ukulahleka kwesiginali. Lokhu akunakutholwa endabeni yama-voltage amasiginali, avame ukusukela ku-0-5 v noma 0-10 v, lapho okuphumayo 0 v okukhipha khona ingcindezi ye-zero.

4. Ukuhlukaniswa kwesiginali

Isiginali ye-4-20 yokuphuma ye-Ma20 MA iyisibonakaliso esiphansi samanje, kanye nokubekwa emaphethelweni womabili (ukudlulisela nokwamukela) kungaholela ekubekeni i-loop, okuholela kwisiginali engafanele. Ukuze ugweme lokhu, umugqa ngamunye we-sensor we-4-20 kufanele uhlukaniswe kahle. Kodwa-ke, uma kuqhathaniswa nokukhipha okungu-0-10 v, lokhu kuvimbela inzwa ukuthi ibe nguDaisy-eboshwe kwingqalasizinda eyodwa yekhebula.

5. Ukuthola ukunemba

Lapho udlulisela ku-Sensor Yengcindezelo, i-voltmeter ingahumusha kalula isinali engu-0-10 v ekugcineni kokuthola. Ngomphumela we-4-20 Ma20, isiginali ingafundwa kuphela ngemuva kokuthi owemukelayo eguqulwa abe ngugesi. Ukuze uguqule lesi siginali ube yi-voltage Drop, i-Resistor ixhumeke ngochungechunge endaweni yokuphuma. Ukunemba kwalomphikisi kubaluleke kakhulu ekulinganiseni ukunemba kwesiginali etholakele.