Module na fitarwar siginar analog mai tashoshi 8 na Allen-Bradley 1769-OF8C CompactLogix

Takaitaccen Bayanin Samfur

Allen-Bradley 1769-OF8C kayan fitar da siginar analog ne na Compact I/O™ mai yawan tashoshi, wanda aka ƙera don aiki tare da na’urorin sarrafa CompactLogix™ ko kuma a matsayin rarrabben I/O a cikin majalisar da take amfani da jerin 1769. Yana da fitar da siginar ƙarfi (current) guda takwas (8) masu ƙuduri mai yawa, waɗanda za su iya samar da siginar 0–20 mA ko 4–20 mA cikin daidaito zuwa na’urorin filin aiki kamar masu buɗe/rufe bawul (valve actuators), na’urorin sarrafa saurin mota, da na’urorin rikodi. Ƙuduri na 16-bit da saurin maida sigina zuwa dijital suna sa ya zama zaɓi mai kyau ga aikace-aikacen sarrafa tsari (process control) masu rikitarwa da ke buƙatar babban daidaito da aminci.

Tsarin Fasaha

• Mai ƙera: Allen-Bradley / Rockwell Automation
• Layin Samfur: CompactLogix / 1769 Compact I/O
• Lambar Katalòg: 1769-OF8C
• Nau’in Fita: Analog Current (Tashoshi 8)
• Matsayin Siginar Fita: 0 zuwa 20 mA da 4 zuwa 20 mA
• Ƙudurin Dijital: 16-bit (unipolar)
• Buƙatar Wuta: Wutar 24V DC daga waje

Ƙayyadaddun Fasaha

Shigarwa & Haɗa Waya

1. Tsabtar Siginar (Signal Integrity): Don tabbatar da mafi girman daidaito ga 1769-OF8C, a yi amfani da kebul ɗin twisted-pair mai kariya (shielded) don duk siginar analog. A ware wayoyin analog daga manyan layukan wuta masu hayaniya, sannan a tabbatar kariyar (shield) tana zuwa ƙasa (ground) a ƙarshen gefe ɗaya kawai (yawanci a jikin I/O chassis) don kauce wa ground loops.

2. Matsayin Shigar da Module: 1769-OF8C yana da takamaiman ƙayyadadden nisan da zai yi daga tushen wuta. Tabbatar an saka module ɗin a cikin iyakar nisan da aka yarda daga wutar tsarin domin kiyaye matakin wutar 24V DC cikin karko da kuma hana sigina yin rawar jiki (fluctuation).

3. Abubuwan Kariya: Wannan module ɗin yana ɗauke da kariyar buɗe-zagaye da gajeriyar hanya (open & short-circuit) a ciki. Idan tashar ta wuce 21 mA ko ta gano buɗaɗɗen zagaye, bits na gano matsala (diagnostic bits) na module ɗin za su kunna, wanda hakan zai ba mai sarrafa (controller) damar aiwatar da lambar tsaro (safe-state logic) ko sanar da ma’aikatan gyara nan take.

Fa’idodin Injiniya

1769-OF8C yana ba da kyakkyawan daidaito tsakanin yawan tashoshi da daidaiton sigina. Tare da madaukai na siginar ƙarfi guda takwas a cikin faɗin module guda ɗaya, yana ajiye sarari sosai a kan DIN rail idan aka kwatanta da modules masu ƙarancin tashoshi. Faɗaɗɗen zangon yanayin zafin aikin sa (-20°C zuwa +60°C) yana ba da damar amfani da shi a muhallai daban-daban, yayin da ƙudurin 16-bit ke tabbatar da cewa maƙudan daidaitawar sarrafawa ma ana aiwatar da su da cikakkiyar aminci da daidaito.

Tambayoyin Fasaha Masu Yawan Faruwa

Q1: Shin wannan module yana tallafawa fitar da ƙarfin lantarki (voltage outputs)?
A1: A’a, 1769-OF8C an ƙera shi ne musamman don fitar da siginar ƙarfi (current outputs) 0–20 mA/4–20 mA. Idan ana buƙatar fitar da siginar voltage, a duba 1769-OF8V.

Q2: Ana buƙatar wutar waje ne don madaukai (loops)?
A2: I, ana buƙatar tushen wutar 24V DC da mai amfani zai bayar don ciyar da da’irar fitar da siginar analog da madaukai na current.

Q3: A wane sauri module ɗin zai iya sabunta duk tashoshi 8?
A3: Module ɗin yana da saurin maida sigina 5 ms ga dukkan tashoshi takwas a lokaci guda, wanda ke ba da kusan amsa ta ainihi (near-real-time) ga madaukar aikin sarrafa tsari.