Ku veka ti signal isolators eka tikhabinete ta vulawuri bya PLC

Eka xiyenge xa ​​automation ya indasitiri, tikhabinete ta vulawuri ta PLC (Programmable Logic Controller) ti tlanga xiave xa nkoka, ti na vutihlamuleri byo amukela swikombiso kusuka eka ti sensors to hambana hambana na ti actuators, na ku fikelela vulawuri lebyi kongomeke bya endlelo ra vuhumelerisi hiku tirhisa matirhelo ya logic yale ndzeni. Hambiswiritano, eka matirhiselo lama tirhaka, tikhabinete to lawula ta PLC ti tala ku langutana na tindhawu to hambana-hambana to rharhangana ta gezi na swiphiqo swa ku kavanyetiwa ka swikombiso, leswi nga vangaka ku nga tirhi kahle ka sisiteme ya vulawuri, ku tsandzeka nkarhi na nkarhi, hambi ku ri ku veka nxungeto eka vuhlayiseki bya switirhisiwa na vatirhi. Hikwalaho, ku engetela xikombiso lexi nga xoxeators ku ya eka tikhabinete to lawula ta PLC swi hundzuke ntlhantlho lowu tolovelekeke.

Mintirho leyikulu ya swihambukelo swa swikombiso yi katsa ku sivela ku hundziseriwa ka ku kavanyeteka ka gezi, ku hunguta ku humelela ka ku tsandzeka ka sisiteme, na ku nyika ku tihambanisa loko ku ri na ku tsandzeka ka switirhisiwa endhawini, ku sivela ku hangalaka ka swihoxo eka sisiteme hinkwayo ya vulawuri. Hi ku cinca-cinca na ku hundzula swikombiso leswi amukeriweke hi PLC hi ku tirhisa switirhisiwa swa semiconductor, kutani ku swi hambanyisa no swi hundzuluxa hi ku tirhisa switirhisiwa swo twa swa mahlo kumbe swa maginete, naswona eku heteleleni ku demodulating no swi hundzula swi tlhelela eka xigingi xo sungula kumbe swikombiso swo hambana, endlelo leri ri tiyisisa ku tshamiseka na ku pakanisa ka xigingi, loko hi hala tlhelo ri sivela ku onhaka ka PLC na ku hunguta ku khumbeka ka swikombiso swa le ndzhawini eka PLC, ngopfungopfu swikombiso swa ku pfilunganyeka. Ku engetela kwalaho, swihambanisi swa swikombiso swi nga tlhela swi fikelela ku hundzuriwa ka swikombiso, ku fana na ku hundzula swikombiso ku suka eka vuhlanganisi bya PT10 ku va swikombiso swa 4-20mA na ku swi nghenisa eka tisisiteme ta PLC, hi ndlela leyinene ku papalata ku lwisana exikarhi ka swihlovo swa gezi na gezi na ku tlhantlha xiphiqo xa ku kavanyetiwa exikarhi ka swirhendzevutani na switirhisiwa.

Eka switirhisiwa swokarhi, kufana na le ka layini ya vuhumelerisi bya feme ya nsimbi, ku pima na vulawuri swifikeleriwa hiku tirhisa PLC, switirhisiwa swa automation swale ndzhawini, na ti actuators ta ndzhawu. PLC yi vekiwa eka khabinete yo lawula leyi kumekaka eka madzana yo hlaya ya timitara kusuka eka ndzhawu (yitirha eka mahiselo ya kamara), naswona switirhisiwa swa automation kumbe ti thermocouples kusuka eka ndzhawu swihumesa swikombiso hiku tirhisa tintambhu kuya eka khabinete yo lawula eka kamara ro lawula. Eka nkarhi lowu, signal leyi nghenaka eka PLC yifanele kuva yi hambanisiwile naswona yinga tlhela yi lava ku hundzuriwa, kufana naku hambanyisa 4-20mA naku yi hundzula kuya eka 0-5V loko yinga se nghena eka PLC. Switirhisiwa leswi hetisisaka ku hambanyisa na ku hundzuriwa ka swikombiso swa thermocouple swi vuriwa "thermocouple signal isolator" kumbe "thermocouple temperature transmitter". Ntirho wa yona wa nkoka wu katsa ku hambanyisa xigingi xa le ndzeni na xigingi xa vuhumelerisi, xikan’we na ku hundzula xigingi xa levele ya mV ya le ndzeni ku suka eka thermocouple ku ya eka swikombiso swa indasitiri swa ntolovelo (4-20mA, 0-5V, 0-10V).

Hi ku komisa, ku veka swihambukelo swa swigingi i swa nkoka swinene eka ku antswisa ku tshembheka ka tisisiteme ta otomatiki ta tiindasitiri, ku hunguta mimpimo ya ku tsandzeka, ku sirhelela switirhisiwa swa PLC, na ku antswisa khwalithi ya swigingi. I xin’wana xa swiphemu swa nkoka ku tiyisisa matirhelo yo tiya no tshembheka ya tisisiteme ta vulawuri