Isignali yombane ye-analog quantity esetyenziswa kakhulu kushishino kukudlulisa ubungakanani be-analog nge-4 ~ 20mA DC current. Isizathu sokusebenzisa isignali yangoku kukuba akulula ukuphazanyiswa, kwaye ukumelana kwangaphakathi komthombo wangoku akunasiphelo. Uchungechunge lokumelana neengcingo kwi-loop aluchaphazeli ukuchaneka, kwaye lunokudluliselwa ngamakhulu eemitha kwisibini esiqhelekileyo esijijekileyo. Umda ophezulu we-20mA kungenxa yeemfuno zokumelana nokuqhuma: amandla e-spark abangelwa kukwaphuka kwangoku kwe-20mA akwanelanga ukutshisa igesi. Isizathu sokuba umda osezantsi ungamiselwanga njenge-0mA kukufumanisa umgca oqhekekileyo: awuyi kuba ngaphantsi kwe-4mA ekusebenzeni okuqhelekileyo. Xa umgca wokudlulisela uqhekekile ngenxa yempazamo kwaye umsinga we-loop wehla uye kwi-0, i-2mA idla ngokubekwa njengexabiso le-alamu yomgca oqhekekileyo.
Ixesha lokuthumela: Agasti-29-2022