Olona phawu lombane lusetyenziswa kakhulu kwi-analog kushishino kukusebenzisa i-4-20mA DC yangoku ukuhambisa i-analog.Isizathu sokusebenzisa umqondiso wangoku kukuba akukho lula ukuphazamisa, kwaye ukuchasana kwangaphakathi komthombo wangoku akunasiphelo, kwaye ukuchasana kocingo kuchungechunge kwi-loop akuchaphazeli ukuchaneka, kwaye kunokudlulisa amakhulu. yeemitha kucingo olujijekileyo oluqhelekileyo.Umda ophezulu ngu-20mA ngenxa yemfuno yobungqina bokuqhuma: amandla e-spark abangelwa ukucima kwe-20mA yangoku ayanele ukuvutha igesi.Isizathu sokuba kutheni umda ophantsi ungamiselwanga kwi-0mA kukuba ukwazi ukubona ukuqhawulwa: akuyi kuba ngaphantsi kwe-4mA ngexesha lokusebenza okuqhelekileyo.Xa umgca wothumelo uphukile ngenxa yesiphoso, i-loop yangoku yehla ukuya kwi-0, kwaye i-2mA isetyenziswa rhoqo njengexabiso le-alamu yokuqhawula.
Ixesha lokuposa: Oct-15-2021