Izindaba Zemikhiqizo

Ngaphakathi kwezindawo zezimboni eziyingozi lapho igesi evuthayo, umhwamuko kanye nothuli oluvuthayo kubeka khona izingozi zokuqhuma okuqhubekayo, izintambo eziphephile (i-IS) zimelela ukulawula ukuphepha okuthuthukisiwe okubalulekile kwezinsimbi ezisebenzisa amandla aphansi, ukuxhumana kanye nezifunda zokulawula. Ngokungafani nezintambo ezijwayelekile ezijwayelekile, izintambo eziphephile ngokwazo zenzelwe ngenhloso yokunciphisa ukukhishwa kwamandla kagesi ngaphansi kwezimo zokusebenza ezijwayelekile kanye nezimo zamaphutha, ukususa imithombo yokushisa engaba khona.

Izintambo eziphephile ngaphakathi kumele zibe luhlaza okwesibhakabhaka (RAL 5015) ngokwe-IEC 60079-14 ukuze kutholakale indawo eyingozi.
Le khodi yombala ephoqelekile ivumela ochwepheshe bezogesi ukuthi bahlukanise ngokushesha izifunda ze-IS nezintambo zikagesi ezingezona eze-IS, okuvimbela ukuxhumeka kwamandla ayingozi ngengozi.
Funda izidingo kanye nezimo ezihlukile.

Ikhebula eliphephile ngokwalo (i-IS) lenzelwe ukuthwala amandla kagesi alinganiselwe angenakubangela ukusha ezindaweni eziqhumayo.

Ngokungafani nezintambo ezingaqhumi eziqukethe ukuqhuma, izintambo ze-IS zivimbela izinhlansi ngokuphelele. Funda incazelo yekhebula le-IS, izidingo zokwakha, ikhodi yombala we-sheath eluhlaza okwesibhakabhaka, kanye namapharamitha enhlangano ngokwe-IEC 60079-11.

Ikhebula eliphephile ngokwalo alikwazi ukukhiqiza noma ukugcina amandla kagesi anele okubangela ukusha ezindaweni eziqhumayo. Funda incazelo, ukuthi izithiyo ezikhawulela amandla zisebenza kanjani, ukuthi kungani amandla aphansi (C) kanye ne-inductance ephansi (L) kubalulekile, nokuthi kungani ikhodi yombala oluhlaza okwesibhakabhaka idingeka emhlabeni wonke ekufakweni kwezindawo eziyingozi.

Ikhebula lensimbi eliphephile ngaphakathi (i-IS) linciphisa amandla kagesi ukuvimbela ukuqhuma ezindaweni eziyingozi. Ngokungafani nemiklamo engavimbeli ukuqhuma (i-Ex-d) equkethe ukuqhuma, izintambo ze-IS ziyayeka ukuvutha ngokulawula i-voltage/current. Funda ngama-sheath aluhlaza okwesibhakabhaka, izidingo zokuvikela, kanye namapharamitha enhlangano ngokwe-IEC 60079-11.

Izintambo ze-Intrinsically Safe (IS) zikhawulela amandla kagesi ukuvimbela ukuthungela ezindaweni zokumba eziqhumayo. Zinemingcele ye-capacitance/inductance elawulwayo enekhodi eluhlaza okwesibhakabhaka yombala okhanyayo noluhlaza okwesibhakabhaka ngokwe-IEC 60079-11, izinketho zokuvikela ezivikelwe izilinganiso ze-Ex-ia/Ex-ib, kanye nemiklamo yekhebula lezinzwa eziguquguqukayo zokuhambisana nokuphepha kokumba ngaphansi komhlaba.

Izintambo ezisicaba (iribhoni/i-FFC) ziyindlela yokonga isikhala, yokuhlanganisa ama-conductor amaningi afanelekela amarobhothi kanye nokwenza izinto ngokuzenzakalela. Zine-insulation ye-FEP (-90°C kuya ku-+200°C), izinketho zama-conductor (CU/TC/SPC/NPC), kanye nokuvikela okuvikelwe noma okungavikelwe. Lo mhlahlandlela uhlanganisa ukudluliswa kwedatha okusheshayo, izinzuzo zomklamo ohlangene, kanye nezinqubo zokukhetha zezinhlelo zokusebenza zamarobhothi ezidingakalayo.

Cha, i-RS485 ne-CAT6 azifani. Izintambo ze-RS485 zenzelwe ukuxhumana kwezimboni okude (1,200m) nge-impedance engu-120Ω yamanethiwekhi e-Modbus RTU. Izintambo ze-CAT6 zenzelwe i-Ethernet enesivinini esikhulu (i-100m, i-100Ω impedance) ezindaweni zehhovisi/i-LAN. Lo mhlahlandlela uqhathanisa amapharamitha abalulekile angu-12+ ukusiza onjiniyela ukuthi bacacise kahle.

Izintambo ze-RS485 kanye ne-Ethernet zisebenza ngezinjongo ezihlukene kakhulu ekuxhumaneni kwezimboni. Lo mhlahlandlela uqhathanisa imininingwane yazo, izidingo zokuvikela, kanye nezinhlelo zokusebenza ezifanelekile ukukusiza wenze ukukhetha okulungile.

Thola ukuthi kungani Izintambo ze-RS485 bangabaholi bemakethe kweze-automation zezimboni. Funda nge-impedance (120Ω), izinto zokuvikela, nokuthi ungayikhetha kanjani igeyiji efanele yezinhlelo ze-Modbus ne-CANopen.