1794-IF4I Allen-Bradley Flex I/O na’urar shigar analog mai keɓewa mai tashoshi 4

Takaitaccen Bayanin Samfur

1794-IF4I ingantaccen Module ɗin Shigar Analog Mai Rabuwa ne na masana'antu a cikin tsarin sarrafa kansa na rarrabacce na Allen-Bradley Flex I/O. An ƙera shi don sa ido kan muhimman siginar kayan aunawa a muhallin da ke da yawan hayaniyar wutar lantarki, wannan module ɗin yana samar da tashoshi 4 na shigarwa masu zaman kansu da aka raba. Ana iya saita kowane tashar dabam-dabam don bin diddigin siginar wuta mai ƙarin daidaito ($\pm10\text{V}$) ko da'irorin yanzu ($4\text{ to }20\text{mA}$). Tare da ƙananan siffa mai matuƙar sauƙi wadda nauyinta kusan 0.2 lbs (kimanin gram 90), wannan sashin masana'antu mai salo na modular yana ba da damar sarrafa sigina a wurin aikace-aikace kai tsaye a kan injuninku, yana kawar da dogayen wayoyin filin masu saurin kamuwa da tsangwamar hayaniya har zuwa babban kwandon kayan aiki.

Manyan Fa'idodin Fasaha

• Rabuwa ta Galvanic Tsakanin Tashoshi: Yana samar da ingantaccen shingen rabuwa na 120 Volts mai ci gaba tsakanin da'irorin shigarwa. Wannan yana hana kwarara na ground-loop marasa tabbas da hayaniyar lantarki tsakanin tashoshi su katse daidaiton bayanan kayan auna ku.
• Tsarin Ƙuduri 16-Bit Mai Inganci: Yana da fitaccen ƙarfin jujjuyar siginar analog zuwa dijital, yana sarrafa bits 16 a kan zangon unipolar da bits 15 tare da alama ga zangon bipolar. Wannan yana haifar da matakai masu matuƙar ƙanƙanta har zuwa 0.156 mV don wuta ko 0.320 μA a kowane ƙididdiga na dijital ga da'irorin yanzu.
• Raguwar Hayaniya Ta Musamman: An sanye shi da da'irar tacewa mai inganci wadda ke ba da Common Mode Rejection Ratio (CMRR) na 100 dB tare da daidaitaccen rage hayaniya na 60 dB, yana tsayar da karatun sigina a wuraren da ke kusa da manyan na'urorin canjin mitar wuta da kayan sauyawar wuta masu ƙarfi.

Bayyanan Fasaha

Jagorar Shigarwa & Wayoyin Filin

• Daidaida Tushen Terminal (Terminal Base Matching): Bangaren 1794-IF4I ba ya zuwa da sukurori na toshe “terminal block” a ciki. Dole ne a haɗa shi da amintaccen rukunin “terminal base” da aka amince da shi. Yana aiki cikakke tare da saitunan tushe na 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T, 1794-TB3TS, da 1794-TBN.
• Wayar Tashoshi & Inganta Martani (Channel Wiring & Response Optimization): Ku yi layin “input loops” ɗinku a hankali don dai-daiku da yanayin ma'aunin da kuke nufi (makaman Voltage da makaman Current). Kayan hardware ɗin yana da saurin martani na mataki (step response) na 10 ms; koyaushe ku tsara aiwatar da PID loop na mai kula (controller) ɗinku da lokutan duba ganewar asali (diagnostic scan intervals) ne bisa wannan saurin samfurin analog na 10 ms.
• MuHIMMIN Lokacin Dumama Tsarin (Crucial System Warm-up Interval): Don hanyoyin da ke buƙatar daidaito mai ƙarfi ko daidaita “thermal loop”, a bar 1794-IF4I ya yi dumama na wutar lantarki na mintuna 30 cikakku bayan kunna wuta. Wannan yana tabbatar da cewa matakan “reference voltages” na ciki da maki na zafi sun daidaita gaba ɗaya, yana tabbatar da daidaiton ±0.1% kamar yadda aka ƙayyade.

Matrix ɗin Amincin Injiniya (Engineering Reliability Matrix)

• Ƙarfin Jiki Mai Ƙarfi (Heavy-Duty Mechanical Resilience): An ƙera shi don yin aiki a muhallin aiki mai tsauri. An tantance bangaren don jure mummunan girgizar jiki har zuwa 30g da kuma girgizar jiki mai ɗorewa har zuwa 5g zuwa 500 Hz ba tare da motsawar sassan ciki daga matsayinsu ba.
• Tasfiyar Samar da Wuta (Power Supply Smoothing): Sashen tace wutar DC na ciki an ƙera shi don karɓar canje-canje da hayaniyar lantarki a cikin tagar 19.0 zuwa 31.2V DC, yana iya ɗaukar har zuwa 5% na AC ripple a layin wuta ba tare da karkacewa daga saitin da aka ƙayyade ba.

Tambayoyin fasaha (Technical FAQs)

Q1: Menene bambancin aiki tsakanin kewayon warwarewa na “unipolar” da na “bipolar”?
A1: Saitin “unipolar” yana amfani da dukkan matakan bit 16 don warware sigina daga sifili zuwa mai kyau (kamar 4-20 mA ko 0-10 V). Yanayin “bipolar” yana ware bit 15 don wakiltar ƙimar sigina, sannan bit na 16 ake amfani da shi a matsayin alamar alkibla mai kyau/mai mara kyau, yana ba da damar bin diddigin siginar da ke canzawa tsakanin bangarori, kamar $\pm10\text{V}$, daidai.

Q2: Me ya sa keɓewar tashoshi (channel isolation) take da matuƙar muhimmanci idan aka kwatanta da “input modules” da ba a keɓe su ba?
A2: Rukunin da ba a ware su ba suna rabon hanya ɗaya ta ƙasa (common electrical ground path) a duk cikin “input circuits” ɗinsu. Idan an haɗa firikwensin filinku da ƙasa a wurare daban-daban a bene na shuka, ƙaramin bambanci a “ground potential” na iya haifar da “ground loops”. 1794-IF4I yana da shingen keɓewar “galvanic isolation barrier” mai ƙimar 120V mai ci gaba a kan kowane tashar, wanda ke katse waɗannan “loop currents” gaba ɗaya kuma yana kare bayananku daga lalacewa.

Q3: Shin bangaren 1794-IF4I yana jan wutar firikwensin gefen fili daga Flexbus?
A3: A'a. Hanyar Flexbus tana samar da ƙananan wutar mantissa 50 mA kawai don ƙaramin ƙarfin lissafin siginar “low-voltage logic power” don gudanar da haɗin baya (backplane interface). Wutar lantarki da ake buƙata don tuƙa kewaye na analog da sarrafa “input loops” dole ne a kawo ta daga waje ta hanyar haɗin filin tashoshin 24V DC na yau da kullum.