Isiginali kagesi ejwayelekile ye-analog quantity esetshenziswa kakhulu embonini ukudlulisa inani le-analog nge-4 ~ 20mA DC current. Isizathu sokusebenzisa isiginali yamanje ukuthi akulula ukuphazamiseka, futhi ukumelana kwangaphakathi komthombo wamanje akunamkhawulo. Uchungechunge lokumelana nentambo ku-loop aluthinti ukunemba, futhi lungadluliselwa amakhulu amamitha ku-pair evamile ejijekile. Umkhawulo ophezulu we-20mA ungenxa yezidingo zokumelana nokuqhuma: amandla enhlansi abangelwa ukuphuka kwamanje kwe-20mA akwanele ukukhanyisa igesi. Isizathu sokuthi umkhawulo ophansi ungabekwa njenge-0mA ukuthola umugqa ophukile: ngeke ube ngaphansi kwe-4mA ekusebenzeni okuvamile. Lapho umugqa wokudlulisela uphukile ngenxa yephutha futhi umugqa wamanje we-loop wehla uye ku-0, i-2mA ivame ukusethwa njengenani le-alamu yomugqa ophukile.
Isikhathi sokuthunyelwe: Agasti-29-2022