Wɔde signal isolators bɛhyɛ PLC control cabinets so

Wɔ mfiridwuma mu automation mu no, PLC (Programmable Logic Controller) control cabinets di dwuma titiriw, a ɛyɛ wɔn asɛde sɛ wogye nsɛnkyerɛnne fi sensor ne actuators ahorow mu, na wonya tumidi pɛpɛɛpɛ wɔ adeyɛ nhyehyɛe no so denam emu ntease dwumadi ahorow so. Nanso, wɔ mfaso a wɔde di dwuma mu no, PLC control cabinets taa hyia electromagnetic mmeae ahorow a ɛyɛ den ne signal interference haw ahorow, a ebetumi ama control system no anyɛ adwuma yiye, ɛtaa di huammɔ, na mpo ɛde asiane ba nnwinnade ne adwumayɛfo ahobammɔ so. Enti, yɛde ka ho sɛnkyerɛnne a atew ne hoators to PLC control cabinets abɛyɛ ano aduru a wɔtaa de di dwuma.

Dwumadi titiriw a signal isolators yɛ ne sɛ esiw electromagnetic interference a ɛbɛkɔ so no ano, ɛbɛtew nhyehyɛe no huammɔdi a ɛba so, na ɛde isolation ma sɛ mfiri no di huammɔ wɔ beae hɔ a, siw mfomso a ɛbɛtrɛw akɔ control system no nyinaa mu no ano. Ɛdenam nsakrae ne nsakrae a ɛba nsɛnkyerɛnne a PLC nya denam semiconductor mfiri so, afei wɔtew ne ho na wɔdannan no denam optical anaa magnetic sensing mfiri a wɔde di dwuma so, na awiei koraa no, demodulating na wɔdannan no san kɔ mfitiase sɛnkyerɛnne anaa nsɛnkyerɛnne ahorow no so no, saa adeyɛ yi hwɛ hu sɛ sɛnkyerɛnne no gyina pintinn na ɛyɛ pɛpɛɛpɛ, bere a ɛsan nso siw ɔsɛe a ɛba PLC no ano na ɛtew nkɛntɛnso a nsɛnkyerɛnne a ɛwɔ beae no nya wɔ PLC no so, titiriw nsɛnkyerɛnne a ɛyɛ basabasa no so. Bio nso, signal isolators nso betumi anya signal nsakrae, te sɛ signals a wɔdannan fi PT10 connections mu kɔ 4-20mA signals na wɔde hyɛ PLC systems mu, wɔ ɔkwan a etu mpɔn so kwati ntawntawdi a ɛda anyinam ahoɔden ne tumi fibea ahorow ntam na wodi ɔhaw a ɛne sɛ loops ne nnwinnade ntam ntwitwiridii ho dwuma.

Wɔ dwumadie pɔtee bi mu, te sɛ wɔ dadeɛ adwumayɛbea bi a wɔyɛ nneɛma mu no, wɔfa PLC, mfiri a wɔde yɛ adwuma wɔ beaeɛ hɔ, ne mfiri a wɔde yɛ adwuma wɔ beaeɛ hɔ so na ɛsusu na wɔdi so. Wɔde PLC no gu control cabinet a ɛwɔ mita ɔhaha pii fi beae no (a ɛyɛ adwuma wɔ dan mu hyew mu), na automation instruments anaa thermocouples a efi beae hɔ no de nsɛnkyerɛnne fa nhama so kɔ control cabinet a ɛwɔ control room no mu. Saa berɛ yi, ɛsɛ sɛ wɔyi nsɛnkyerɛnneɛ a ɛhyɛn PLC no mu no fi hɔ na ebia ɛho bɛhia nso sɛ wɔdane no, te sɛ 4-20mA a wɔbɛyi afiri mu na wɔadan no akɔ 0-5V ansa na wɔahyɛne PLC no mu. Wɔfrɛ mfiri a ɛwie thermocouple nsɛnkyerɛnneɛ a wɔayiyi ne nsakraeɛ no "thermocouple signal isolator" anaa "thermocouple temperature transmitter". Ne dwumadie titire no bi ne sɛ ɛbɛyi input signal ne output signal no afiri mu, ne afei nso sɛ ɛbɛdan input mV level signal afiri thermocouple no mu akɔ standard industrial signals (4-20mA, 0-5V, 0-10V).

Sɛ yɛbɛbɔ no mua a, signal isolators a wɔde besisi hɔ no ho hia kɛse ma ahotoso a ɛwɔ industrial automation systems mu no tu mpɔn, ɛtew huammɔdi dodow so, bɔ PLC mfiri ho ban, na ɛma signal quality tu mpɔn. Ɛyɛ nneɛma a ɛho hia a ɛbɛma wɔahwɛ ahu sɛ nhyehyɛe ahorow a wɔde di dwuma no yɛ adwuma a ɛyɛ den na wotumi de ho to so no mu biako