Allen-Bradley 1794-IR8 Flex I/O na’urar shigar RTD mai tashoshi 8

Takaitaccen Bayaninsa Samfurin

1794-IR8 ingantaccen, madaidaicin Modulen Shigar RTD (Resistance Temperature Detector) ne daga amintacciyar layin kayan rarrabawa na Flex I/O na Allen-Bradley. Yana canza ƙaramin sauye-sauyen juriya zuwa jerin bayanan dijital a kai a kai, kuma wannan modulen yana da tashoshi 8 na shigarwa masu zaman kansu da aka ƙera domin su haɗu da nau’ikan na’urorin RTD na Platinum, Nickel, da Copper. An ƙera shi da ƙaramin jiki na masana’antu mai matuƙar sauƙin nauyi wanda nauyinsa kusan 0.2 lbs (kimanin gram 90), wannan sassan DIN-rail mai tsarin module yana bai wa ƙungiyoyin masana’antu damar ɗora na’urorin I/O da ke kusa da injinan sarrafawa, yana rage tsawon wayoyi yayin da yake kiyaye kyakkyawan hana hayaniya ba tare da ƙara wa kwamitin kula wani nauyi mai yawa ba.

Babban Ƙarfafa Fasaha

• Canjin Dijital Mai Ƙuduri Mai Ƙarfi: Yana amfani da na’urar canza analog-zuwa-dijital mai bit 16 wadda take rufe sikeli na juriya na al’ada daga 1 zuwa 433 Ohms, tana tabbatar da ƙwarin daidaito wajen bin sauye-sauyen zafi kaɗan-kaɗan.
• Zane-zanen Ingantaccen Aiki Biyu: Yana tallafawa aiwatarwa a Yanayin “Al’ada (Normal Mode)” wanda ke ba da daidaito cikakke na ±0.05%, ko kuma “Yanayin Ƙara Inganci (Enhanced Mode)” da za a iya zaɓa ta software wanda ke tsananta iyakokin aiki zuwa bambanci na al’ada na kusan ±0.01%.
• Faɗaɗɗen Ƙarfin Haɗawa da Na’urorin Ƙididdigar Zafi: Ana shirya shi ta shirin kwamfuta don daidaita da nau’o’in na’urorin auna masana’antu da dama ciki har da ƙwararrun layin Platinum na 100, 200, da 500 Ohm (ƙididdigar Turai/U.S.), nau’ikan Nickel masu ƙarin jin kai, da na’urorin Copper na 10 Ohm.

Ƙayyadaddun Fasaha

Jagorar Shigarwa & Haɗa Wayoyi a Filin Aiki

• Daidaituwar Terminal Base & Hawa: Module 1794-IR8 yana makalewa kai tsaye a cikin takamaiman Flex I/O terminal base assemblies (kamar 1794-TB3 ko 1794-TB3S). Saboda module ɗin kansa yana da jiki mai haske kuma mai ɗan ƙaramin nauyi na fam 0.2 kawai, ana iya jera modules da dama a kan daidaitattun 35mm DIN rails ba tare da haɗarin lanƙwashewa ko nauyi mai yawa a bayan farantin akwati ba.
• Abin da Ake Iya Tsammani na System Throughput: A cikin Normal Mode, duba tashar aiki guda ɗaya yana ɗaukar 325 ms, yayin da gudu a kan duk tashoshi 8 ke ɗaukar daƙiƙa 2.6. Idan lambar ka ta zaɓi Enhanced Mode, tsohuwar lokacin duba duk tashoshi 8 zai haura zuwa daƙiƙa 2.925. Ka tabbata timers na madauwar (loop) ƙa’idar sarrafawarka sun lissafa waɗannan lokutan juyawa (conversion windows).
• Mafi Kyawun Hanyar Haɗa Shield: Don kare hanyoyin sigina masu rauni daga tsangwamar lantarki mai yawan mita (high-frequency electromagnetic interference), yi amfani da igiyoyin filin masu karkace biyu (twisted-pair) da shield. Haɗa sashin shield na igiyar zuwa terminals na ƙasa da aka ware a kan Flex I/O base assembly, ka tabbatar an ɗaure shi da ƙasa a ɓangare guda kawai.

Engineering Reliability Matrix

• Kare Galvanic Loop: Yana da ƙarfaffen shinge na ware wuta (isolation barrier) 850V DC wanda ke raba da’irorin firikwensin na gefen filin daga na’urorin Flexbus logic na ciki, don hana mummunar dawowar wuta ta baya.
• Kayan Latsawa Masu Ƙarfafa Kan Girgiza: Duk da nauyinsa ƙasa da kashi ɗaya bisa biyar na fam (0.2 lbs), ingantaccen tsarin riƙe module ɗin gaba ɗaya an tabbatar da shi don ya iya jure wa tsayayyen tsarin girgiza na injiniya har zuwa 5g a tsakanin mitoci 10 zuwa 500 Hz, wanda ke sa ya dace a daure shi a kan manyan firam na injinan masana’antu ko kan skids na masana’antu.

Technical FAQs

Q1: Menene ma’anar ƙayyadadden ƙarar wutar motsa firikwensin (excitation current) 718.36 µA ga zaɓin firikwensina?
A1: Wannan ƙimar tana wakiltar madaidaicin ƙaramin ƙarar wuta (current) na ciki da module ɗin ke turawa a duk faɗin sashin RTD don ƙididdige juriya. An daidaita wannan matakin current ne don rage kuskuren dumamar kai (self-heating) a ƙarshen firikwensin yayin da har yanzu ake samun kyakkyawan signal-to-noise ratio.

Q2: Zan iya haɗa RTD na 2-wire, 3-wire, ko 4-wire zuwa module 1794-IR8?
A2: Module ɗin yana ba da cikakkiyar gyaran juriya na wayoyi (lead-wire resistance compensation) idan aka yi amfani da shi tare da daidaitattun tsarin 3-wire ko 4-wire. Ana iya haɗa firikwensin 2-wire ta hanyar ƙara wayoyi masu tsalle (jumper wires) a kan terminal base block, amma ba su da gyaran juriya ta layi, kuma hakan na iya jawo karkacewar sakamako saboda yanayin zafi (ambient offset drift).

Q3: Menene ke sa hali na kuskuren tashar ko yanayin wayar da ta yanku ya bayyana a cikin tags na na’urar sarrafa PLC?
A3: 1794-IR8 na dauke da tsarin bincike (diagnostic logic) da aka hade wanda ke sa ido kan ci gaba da haɗin da’irar filin (field loop continuity). Idan igiyar filin ta yanke, wani ɓangaren firikwensin ya lalace, ko juriya da aka auna ta haura ƙimar ƙofar 435 Ohm, tashar za ta sa bit ɗin kuskuren high-range don kare tsarin na’ura mai sarrafa kansa da ke gaba.