{"product_id":"1791-ndc-allen-bradley-24vdc-analog-i-o-module","title":"1791-NDC - Allen-Bradley 24VDC Analog I\/O Module","description":"\u003ch2\u003e\u003cstrong\u003eProduct Overview: Allen-Bradley 1791-NDC Analog Block I\/O Module\u003c\/strong\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Technical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e \u003cspan style=\"color: #e74c3c;\"\u003eAllen-Bradley\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e \u003cstrong\u003e\u003cspan style=\"color: #e74c3c;\"\u003e1791-NDC\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e 1791 Block I\/O\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModule Type:\u003c\/strong\u003e Analog Input \/ Current Output Module\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Supply:\u003c\/strong\u003e 24V DC (19.2 - 30V DC Range)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupply Current:\u003c\/strong\u003e 600 mA Maximum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnalog Inputs:\u003c\/strong\u003e 4 Channels, Selectable Type\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnalog Outputs:\u003c\/strong\u003e 2 Channels, 0-20 mA Current\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Resolution:\u003c\/strong\u003e \u003cstrong\u003e\u003cspan style=\"color: #27ae60;\"\u003e14-bit\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Resolution:\u003c\/strong\u003e 13-bit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAbsolute Accuracy:\u003c\/strong\u003e \u003cstrong\u003e\u003cspan style=\"color: #27ae60;\"\u003e0.1% at 25°C\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Update Rate:\u003c\/strong\u003e 108 ms per channel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Update Rate:\u003c\/strong\u003e 10 ms per channel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Bandwidth:\u003c\/strong\u003e 5 Hz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Dissipation:\u003c\/strong\u003e 11.52 W max. (39.28 BTU\/hr)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.00 lb (0.45 kg)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eAnalog Input Characteristics\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAll four inputs are \u003cstrong\u003e\u003cspan style=\"color: #2980b9;\"\u003eindividually selectable\u003c\/span\u003e\u003c\/strong\u003e for signal type.\u003c\/li\u003e\n\u003cli\u003eSupported voltage ranges: ±10V, ±5V, 0-10V, 0-5V.\u003c\/li\u003e\n\u003cli\u003eSupported current ranges: 0-20 mA, ±20 mA.\u003c\/li\u003e\n\u003cli\u003eInput impedance is \u003cstrong\u003e\u003cspan style=\"color: #27ae60;\"\u003e10 MΩ for voltage\u003c\/span\u003e\u003c\/strong\u003e and 250 Ω for current.\u003c\/li\u003e\n\u003cli\u003eFeatures excellent noise rejection: \u003cstrong\u003e\u003cspan style=\"color: #27ae60;\"\u003e-75 dB CMRR\u003c\/span\u003e\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eIncludes a built-in \u003cstrong\u003e\u003cspan style=\"color: #27ae60;\"\u003e24VDC loop power supply\u003c\/span\u003e\u003c\/strong\u003e for 2-wire transmitters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eAnalog Output Characteristics\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe two outputs provide a standard \u003cstrong\u003e\u003cspan style=\"color: #2980b9;\"\u003e0 to 20 mA signal\u003c\/span\u003e\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eOutputs feature \u003cstrong\u003e\u003cspan style=\"color: #27ae60;\"\u003eindefinite short-circuit protection\u003c\/span\u003e\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eHigh output impedance (\u0026gt;1 MΩ) ensures stable current sourcing.\u003c\/li\u003e\n\u003cli\u003eOutputs update rapidly every 10 milliseconds for responsive control.\u003c\/li\u003e\n\u003cli\u003eOvervoltage protection is rated up to \u003cstrong\u003e\u003cspan style=\"color: #27ae60;\"\u003e140V AC\u003c\/span\u003e\u003c\/strong\u003e for durability.\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\u003eQ: What input signal types does the 1791-NDC accept?\u003c\/strong\u003e\u003cbr\u003eA: It accepts \u003cstrong\u003e\u003cspan style=\"color: #27ae60;\"\u003evoltage (±10V, 0-10V, etc.) and current (0-20mA)\u003c\/span\u003e\u003c\/strong\u003e signals on each input.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: What is the output signal from this module?\u003c\/strong\u003e\u003cbr\u003eA: It provides two \u003cstrong\u003e\u003cspan style=\"color: #27ae60;\"\u003e0-20 mA current output\u003c\/span\u003e\u003c\/strong\u003e channels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: Does it provide power for field transmitters?\u003c\/strong\u003e\u003cbr\u003eA: Yes, it includes an internal 24VDC source for \u003cstrong\u003e\u003cspan style=\"color: #27ae60;\"\u003eloop-powered transducers\u003c\/span\u003e\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: What is the resolution of the analog inputs?\u003c\/strong\u003e\u003cbr\u003eA: The inputs have a high \u003cstrong\u003e\u003cspan style=\"color: #27ae60;\"\u003e14-bit resolution\u003c\/span\u003e\u003c\/strong\u003e for precise measurement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: Is the 1791-NDC module in stock?\u003c\/strong\u003e\u003cbr\u003eA: Yes, we have original Allen-Bradley stock ready for fast delivery.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: What is your return policy?\u003c\/strong\u003e\u003cbr\u003eA: All purchases are covered by our \u003cstrong\u003e\u003cspan style=\"color: #27ae60;\"\u003e30-day return policy\u003c\/span\u003e\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e© 2026 NexAuto Technology Limited. All rights reserved.\u003cbr\u003eOriginal Source: \u003ca href=\"https:\/\/www.nex-auto.com\/\"\u003ehttps:\/\/www.nex-auto.com\/\u003c\/a\u003e\u003cbr\u003eContact: \u003ca href=\"mailto:sales@nex-auto.com\"\u003esales@nex-auto.com\u003c\/a\u003e | Phone: \u003ca href=\"https:\/\/wa.me\/8615392429628\"\u003e+86 153 9242 9628\u003c\/a\u003e\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":47289575997698,"sku":"1791-NDC","price":216.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7280\/6146\/files\/1791-NDC.jpg?v=1773900011","url":"https:\/\/www.nex-auto.com\/ar\/products\/1791-ndc-allen-bradley-24vdc-analog-i-o-module","provider":"NexAuto Technology Limited","version":"1.0","type":"link"}