{"product_id":"allen-bradley-1794-if4i-flex-i-o-isolated-analog-input-module","title":"Allen-Bradley 1794-IF4I Flex I\/O Isolated Analog Input Module","description":"\u003ch2\u003e\u003cstrong\u003eAllen-Bradley 1794-IF4I Flex I\/O Isolated Analog Input Module\u003c\/strong\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cstrong\u003eChannel Isolation and Signal Flexibility\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully Isolated Inputs:\u003c\/strong\u003e The \u003cspan style=\"color: #c62828;\"\u003e\u003cstrong\u003e1794-IF4I\u003c\/strong\u003e provides four individually isolated channels\u003c\/span\u003e that prevent ground loops and electrical interference from affecting measurement accuracy. This isolation protects sensitive control systems from voltage transients on field wiring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile Signal Support:\u003c\/strong\u003e Engineers can configure each channel for multiple signal types including \u003cspan style=\"color: #c62828;\"\u003e0-20 mA, 4-20 mA, ±20 mA, ±10 VDC, 0-10 VDC, ±5 VDC, and 0-5 VDC\u003c\/span\u003e. This flexibility allows the module to interface with virtually any industrial sensor or transmitter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUser-Configurable Ranges:\u003c\/strong\u003e All input ranges are software-configurable, eliminating the need for hardware jumpers or switches. You can change signal types without opening the panel or removing the module.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDifferential Inputs:\u003c\/strong\u003e The four differential-ended inputs provide superior noise rejection compared to single-ended designs. This ensures accurate measurements even in electrically noisy industrial environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eTechnical Specifications and Performance\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Resolution:\u003c\/strong\u003e The \u003cstrong\u003e1794-IF4I\u003c\/strong\u003e delivers \u003cspan style=\"color: #c62828;\"\u003e16-bit resolution for unipolar operation and 15 bits plus sign for bipolar signals\u003c\/span\u003e. Voltage resolution measures 0.156 mV per count for unipolar and 0.313 mV per count for bipolar. Current resolution provides 0.320 µA per count for unipolar and 0.640 µA per count for bipolar.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSigma-Delta Conversion:\u003c\/strong\u003e The module uses advanced Sigma-Delta analog-to-digital converter (ADC) technology for precise signal measurement. The update rate is selectable at 2.5 ms, 5.0 ms, or 7.5 ms for all channels, allowing engineers to balance speed and resolution based on application requirements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccuracy:\u003c\/strong\u003e It maintains an absolute accuracy of 0.1% of full scale at 25 °C for both voltage and current inputs. The voltage input accuracy includes gain, repeatability, offset, and nonlinearity error terms in this specification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccuracy Drift:\u003c\/strong\u003e Temperature stability remains excellent with 0.0028% of full scale per °C for voltage inputs and 0.0038% of full scale per °C for current inputs. This ensures consistent performance across varying ambient temperatures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep Response:\u003c\/strong\u003e The step response varies based on the selected conversion rate. At 1200 Hz conversion rate, response time is 0.6 ms. At 600 Hz, response is 6.7 ms. At 300 Hz, response is 13.4 ms. At 150 Hz, response is 26.7 ms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Requirements:\u003c\/strong\u003e The module draws 50 mA from the 5V DC FlexBus. External DC power supply current is 80 mA at 24V DC nominal, with an acceptable range of 19.0 to 31.2V DC including 5% AC ripple. Total current draw measures 145 mA at 5.1V and 125 mA at 24V.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Dissipation:\u003c\/strong\u003e Maximum power dissipation is 2.0W at 31.2V DC, with thermal dissipation of 6.8 BTU\/hour under the same conditions. This low power consumption minimizes heat buildup in control panels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnvironmental Specifications:\u003c\/strong\u003e The \u003cstrong\u003e1794-IF4I\u003c\/strong\u003e operates in temperatures from 0 to 55 °C (32 to 131 °F) with maximum surrounding air temperature of 55 °C. Storage temperature range extends from -40 to 85 °C (-40 to 185 °F). It handles non-condensing relative humidity of 5 to 95%.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVibration and Shock:\u003c\/strong\u003e The module withstands vibration of 5g at 10 to 500 Hz. It survives operating shock of 30g and non-operating shock of 50g, ensuring reliability in harsh industrial environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIsolation Voltage:\u003c\/strong\u003e Continuous isolation voltage reaches 120V when using \u003cstrong\u003e1794-TB2\u003c\/strong\u003e, \u003cstrong\u003e1794-TB3\u003c\/strong\u003e, \u003cstrong\u003e1794-TB3S\u003c\/strong\u003e, \u003cstrong\u003e1794-TB3T\u003c\/strong\u003e, or \u003cstrong\u003e1794-TB3TS\u003c\/strong\u003e bases. When using the \u003cstrong\u003e1794-TBN\u003c\/strong\u003e base, continuous isolation voltage increases to 250V for higher isolation requirements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions (FAQ)\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIs the Allen-Bradley 1794-IF4I a genuine new product?\u003c\/strong\u003e\u003cbr\u003eYes, we supply the \u003cstrong\u003e1794-IF4I\u003c\/strong\u003e as a brand new, original Allen-Bradley product in factory-sealed condition. We never provide used, refurbished, or counterfeit items.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat is the difference between the 1794-IF4I and standard analog modules?\u003c\/strong\u003e\u003cbr\u003eThe \u003cstrong\u003e1794-IF4I\u003c\/strong\u003e provides full channel-to-channel isolation, meaning each of the four inputs is electrically isolated from the others. This prevents ground loops and protects against voltage differences between sensors, unlike non-isolated modules where inputs share a common reference.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhich terminal base should I choose for 250V isolation?\u003c\/strong\u003e\u003cbr\u003eIf you require 250V continuous isolation, you must use the \u003cstrong\u003e1794-TBN\u003c\/strong\u003e terminal base with the \u003cstrong\u003e1794-IF4I\u003c\/strong\u003e. All other compatible bases provide 120V continuous isolation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCan I mix different signal types on different channels?\u003c\/strong\u003e\u003cbr\u003eYes, you can independently configure each of the four channels for different input signal types. One channel can measure 4-20 mA while another measures ±10V, all within the same \u003cstrong\u003e1794-IF4I\u003c\/strong\u003e module.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat conversion rate should I select for my application?\u003c\/strong\u003e\u003cbr\u003eThe \u003cstrong\u003e1794-IF4I\u003c\/strong\u003e offers selectable update rates of 2.5 ms, 5.0 ms, and 7.5 ms. Choose faster rates for applications requiring quick response, such as motion control. Choose slower rates for better noise rejection in steady-state process monitoring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDo you have the 1794-IF4I in stock?\u003c\/strong\u003e\u003cbr\u003eYes, we maintain inventory of the \u003cstrong\u003e1794-IF4I\u003c\/strong\u003e module. We typically process and ship orders within 5 business days using DHL, UPS, or FedEx based on your location and shipping preference.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat is your return policy?\u003c\/strong\u003e\u003cbr\u003eWe offer a 30-day return window for the \u003cstrong\u003e1794-IF4I\u003c\/strong\u003e provided the item remains in its original, unused condition with all packaging intact and unopened.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDoes this module require field calibration?\u003c\/strong\u003e\u003cbr\u003eThe \u003cstrong\u003e1794-IF4I\u003c\/strong\u003e arrives factory-calibrated and performs accurately without immediate calibration. However, unlike some Flex I\/O modules, you can recalibrate this module in the field if your application demands periodic verification or after many years of service.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat is the step response time for each conversion rate?\u003c\/strong\u003e\u003cbr\u003eAt 1200 Hz conversion rate, step response is 0.6 ms. At 600 Hz, response is 6.7 ms. At 300 Hz, response is 13.4 ms. At 150 Hz, response is 26.7 ms. These values represent the time to reach final value after an input step change.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eContact Information Inquiries: \u003ca href=\"mailto:sales@nex-auto.com\"\u003esales@nex-auto.com\u003c\/a\u003e , \u003ca href=\"https:\/\/wa.me\/8615392429628\"\u003e+86 153 9242 9628\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003ePartner \u003ca href=\"https:\/\/www.nex-auto.com\/\"\u003eNexAuto Technology Limited : https:\/\/www.nex-auto.com\/\u003c\/a\u003e\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45778241257633,"sku":"1794-IF4I","price":254.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0673\/5390\/3265\/files\/1794-IF4I-1.jpg?v=1772445150","url":"https:\/\/www.autonexcontrol.com\/th\/products\/allen-bradley-1794-if4i-flex-i-o-isolated-analog-input-module","provider":"AutoNex Controls Limited ","version":"1.0","type":"link"}