Nkhani Zamalonda

M'malo oopsa a mafakitale komwe mpweya woyaka, nthunzi ndi fumbi loyaka limayambitsa ngozi zophulika nthawi zonse, mawaya otetezeka mkati (IS) ndi njira yofunikira kwambiri yowongolera chitetezo cha zida zamagetsi zochepa, kulumikizana, ndi ma circuits owongolera. Mosiyana ndi mawaya wamba, mawaya otetezeka mkati mwake amapangidwa kuti achepetse kutulutsa mphamvu zamagetsi pansi pa magwiridwe antchito abwinobwino komanso olakwika, kuchotsa magwero omwe angayatse.

Zingwe zotetezeka mkati mwake ziyenera kukhala zopepuka ngati buluu (RAL 5015) malinga ndi IEC 60079-14 kuti zizindikire malo oopsa.
Khodi yofunikira iyi ya utoto imalola akatswiri amagetsi kusiyanitsa nthawi yomweyo ma circuits a IS ndi zingwe zamagetsi zomwe si za IS, kupewa kulumikizana mwangozi kwa mphamvu zoopsa.
Phunzirani zofunikira ndi zosiyana.

Chingwe chotetezeka mwachilengedwe (IS) chapangidwa kuti chizinyamula mphamvu zamagetsi zochepa zomwe sizingayambitse kuyaka m'mlengalenga wophulika.

Mosiyana ndi zingwe zosaphulika zomwe zimakhala ndi kuphulika, zingwe za IS zimaletsa kuphulika konse. Dziwani tanthauzo la chingwe cha IS, zofunikira pa kapangidwe kake, mtundu wa sheath wabuluu, ndi magawo a chinthu malinga ndi IEC 60079-11.

Chingwe chotetezeka mwachibadwa sichingathe kupanga kapena kusunga mphamvu zamagetsi zokwanira kuti ziyatse moto m'mlengalenga wophulika. Dziwani tanthauzo, momwe zotchinga zochepetsera mphamvu zimagwirira ntchito, chifukwa chake mphamvu zochepa (C) ndi inductance yochepa (L) ndizofunikira, komanso chifukwa chake mtundu wabuluu umafunika padziko lonse lapansi pakukhazikitsa malo oopsa.

Chingwe cha Intrinsically Safe (IS) chimachepetsa mphamvu zamagetsi kuti chiteteze kuphulika m'malo oopsa. Mosiyana ndi mapangidwe osaphulika (Ex-d) omwe ali ndi kuphulika, zingwe za IS zimayimitsa kuyaka mwa kulamulira mphamvu yamagetsi/yamagetsi. Dziwani zambiri za zipolopolo zabuluu, zofunikira zotetezera, ndi magawo azinthu malinga ndi IEC 60079-11.

Zingwe za Intrinsically Safe (IS) zimachepetsa mphamvu zamagetsi kuti zisayake m'malo ophulika a migodi. Zili ndi magawo olamulidwa a capacitance/inductance okhala ndi mtundu wabuluu wowala motsatira IEC 60079-11, zosankha zotchingira zotetezedwa Ex-ia/Ex-ib ratings, ndi mapangidwe a chingwe chosinthika cha sensor kuti chitsatire chitetezo cha migodi yapansi panthaka.

Zingwe zosalala (ribbon/FFC) ndi zosungira malo, zolumikizira ma conductor ambiri zoyenera kugwiritsa ntchito ma robotic ndi automation. Zili ndi FEP insulation (-90°C mpaka +200°C), zosankha za conductor (CU/TC/SPC/NPC), komanso zotchingira zotchingira kapena zosatchingira. Bukuli likufotokoza za kutumiza deta mwachangu, ubwino wa kapangidwe kakang'ono, ndi njira zosankhira ntchito za robotic zomwe zimafuna ndalama zambiri.

Ayi, RS485 ndi CAT6 sizofanana. Zingwe za RS485 zapangidwira kulumikizana kwa mafakitale kutali (1,200m) ndi 120Ω impedance ya ma netiweki a Modbus RTU. Zingwe za CAT6 zapangidwa kuti zigwirizane ndi Ethernet yothamanga kwambiri (100m, 100Ω impedance) m'malo ogwirira ntchito/LAN. Bukuli likuyerekeza magawo 12+ ofunikira kuti athandize mainjiniya kutchula bwino.

Zingwe za RS485 ndi Ethernet zimagwira ntchito zosiyanasiyana polumikizana ndi mafakitale. Bukuli likuyerekeza zofunikira zawo, zofunikira pachitetezo, ndi ntchito zabwino kuti zikuthandizeni kusankha bwino.

Dziwani chifukwa chake Zingwe za RS485 ndi atsogoleri pamsika pa ntchito zodzipangira zokha zamafakitale. Dziwani zambiri za impedance (120Ω), zipangizo zotetezera, komanso momwe mungasankhire geji yoyenera ya machitidwe a Modbus ndi CANopen.