Kufaka ema-isolators esiginali kumakhabethe ekulawula e-PLC

Emkhakheni wekusebenta ngekuzenzakalela kwetimboni, emakhabethe ekulawula e-PLC (Programmable Logic Controller) adlala indzima lebalulekile, lanesibopho sekutfola timphawu letivela kuma-sensors lehlukahlukene kanye ne-actuators, kanye nekufeza kulawula lokunembile kwenchubo yekukhicita ngemisebenti ye-logic yangaphakathi. Kepha, ekusebentiseni lokusebenta, emakhabethe ekulawula e-PLC avame kubhekana netindzawo letehlukahlukene letiyinkimbinkimbi te-electromagnetic kanye netinkinga tekuphazamiseka kwesiginali, lokungaholela ekungasebenti kahle kweluhlelo lwekulawula, kwehluleka njalo, futsi ngisho nekubeka ingoti ekuphepheni kwemishini kanye netisebenti. Ngako-ke, kwengeta . Siginali leyehlukileators kuya PLC emakhabethe ekulawula sekube sisombululo lesivamile.

Imisebenti leyinhloko ye-signal isolators ifaka ekhatsi kuvikela kudluliselwa kwekuphazamiseka kwe-electromagnetic, kunciphisa kwenteka kwekwehluleka kweluhlelo, kanye nekuniketa kuhlukaniswa uma kwenteka kwehluleka kwemishini endzaweni, kuvikela kusakateka kwemaphutsa kulo lonkhe luhlelo lwekulawula. Ngekugucula nekugucula timphawu letitfolwe yi-PLC ngetintfo te-semiconductor, bese tiyahlukaniswa futsi tiguculwe kusetjentiswa tintfo tekuzwa letibonakalako noma te-magnetic, bese ekugcineni tigucula futsi tiguculwe tibuyele emuva kusiginali yekucala noma timphawu letehlukene, lenchubo icinisekisa kusimama kanye nekunemba kwesiginali, ngesikhatsi futsi kuvimbela umonakalo lokhetsekile ku- PLC- timphawu tekuphitsitela. Ngetulu kwaloko, ema-isolators esiginali angaphindze afinyelele kuguculwa kwesiginali, njengekugucula timphawu kusuka ekuxhumaneni kwe-PT10 tibe timphawu te-4-20mA bese tiyafakwa etinhlelo te-PLC, kugwema ngemphumelelo kungcubutana emkhatsini wemtfombo wegezi kanye nemandla kanye nekusombulula inkinga yekuphazamiseka lokufanako emkhatsini wetiluphu kanye nemishini.

Ekusebentiseni lokutsite, njengasemgceni wekukhicita wesitjalo sensimbi, kukala kanye nekulawula kufezwa nge-PLC, tintfo tekusebenta letisendzaweni, kanye ne-actuators lesendzaweni. Le PLC ibekwa ekhabetheni lekulawula lelisemamitha lamakhulu lamanyenti kusuka kulendzawo (isebenta ngekushisa kweligumbi), kanye netintfo tekusebenta letitentekelako noma ema thermocouples lasuka kulendzawo akhipha timphawu ngetintambo letingena ekhabetheni lekulawula egumbini lekulawula. Kuleliphuzu, lesibonakaliso lesingena ku PLC kumele sihlukaniswe futsi kungaphindze kudzingeke kutsi siguculwe, njengekuhlukanisa 4-20mA bese siyigucula ibe ngu 0-5V ngaphambi kwekungena ku PLC. Lemishini lecedza kuhlukaniswa kanye nekuguculwa kwetimphawu te-thermocouple ibitwa ngekutsi "i-solator yesiginali ye-thermocouple" noma "umdluliseli wekushisa kwe-thermocouple". Umsebenti wayo lomcoka ufaka ekhatsi kuhlukanisa luphawu lwekufaka kanye neluphawu lwekukhipha, kanye nekugucula luphawu lwelizinga le-mV lekufaka kusuka ku-thermocouple lube timphawu tetimboni letijwayelekile (4-20mA, 0-5V, 0-10V).

Ngalokufishane, kufaka ema-isolators esiginali kubaluleke kakhulu ekwenteni ncono kwetsembeka kwetinhlelo tekusebenta ngekuzenzakalela kwetimboni, kunciphisa emazinga ekwehluleka, kuvikela imishini ye-PLC, kanye nekutfutfukisa lizinga lesiginali. Kuyinye yetintfo letibalulekile kucinisekisa kusebenta lokuzinzile nalokwetsembekile kwetinhlelo tekulawula .