{"product_id":"allen-bradley-1791-n4v2-analog-i-o-module","title":"Allen-Bradley | 1791-N4V2 Analog I\/O Module","description":"\u003ch2\u003e\u003cstrong\u003eProduct Overview: Allen-Bradley 1791-N4V2 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-N4V2\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 Combination Analog Input \/ Voltage Output Module\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTotal Channels:\u003c\/strong\u003e 6 Points (4 Inputs, 2 Outputs)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnalog Inputs:\u003c\/strong\u003e 4 Channels, Selectable Voltage or Current\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnalog Outputs:\u003c\/strong\u003e 2 Channels, Voltage Output\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\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\u003eLinearity:\u003c\/strong\u003e 0.05% at 25°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCommon Mode Rejection:\u003c\/strong\u003e -75 dB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShort Circuit Protection:\u003c\/strong\u003e \u003cstrong\u003e\u003cspan style=\"color: #27ae60;\"\u003eIndefinite (Outputs)\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Impedance:\u003c\/strong\u003e Less than 1 Ohm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.25 lbs (0.57 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\u003eThe four analog inputs are \u003cstrong\u003e\u003cspan style=\"color: #2980b9;\"\u003efully selectable per channel\u003c\/span\u003e\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eYou can configure each one independently for voltage or current signals.\u003c\/li\u003e\n\u003cli\u003eThe module offers excellent noise immunity with \u003cstrong\u003e\u003cspan style=\"color: #27ae60;\"\u003e-75 dB CMRR\u003c\/span\u003e\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eIt provides high-precision measurement with 0.1% absolute accuracy.\u003c\/li\u003e\n\u003cli\u003eThe input update rate is 108 milliseconds for reliable data sampling.\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 analog outputs provide a stable \u003cstrong\u003e\u003cspan style=\"color: #2980b9;\"\u003evoltage signal\u003c\/span\u003e\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eOutputs update quickly, every 10 milliseconds per channel.\u003c\/li\u003e\n\u003cli\u003eThey feature \u003cstrong\u003e\u003cspan style=\"color: #27ae60;\"\u003eindefinite short-circuit protection\u003c\/span\u003e\u003c\/strong\u003e for durability.\u003c\/li\u003e\n\u003cli\u003eThis robust protection prevents damage from wiring errors or load faults.\u003c\/li\u003e\n\u003cli\u003eThe low output impedance (\u0026lt;1 Ohm) ensures strong signal drive capability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eInstallation \u0026amp; Network Configuration\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMount the module on a standard DIN rail within your control panel.\u003c\/li\u003e\n\u003cli\u003eYou must wire all Block I\/O modules \u003cstrong\u003e\u003cspan style=\"color: #c0392b;\"\u003ein a series\u003c\/span\u003e\u003c\/strong\u003e on the RIO network.\u003c\/li\u003e\n\u003cli\u003eNever attempt to connect modules in a parallel wiring configuration.\u003c\/li\u003e\n\u003cli\u003eThe total number of modules depends on system scan time and requirements.\u003c\/li\u003e\n\u003cli\u003eInstall a terminating resistor on the \u003cstrong\u003e\u003cspan style=\"color: #c0392b;\"\u003elast physical module\u003c\/span\u003e\u003c\/strong\u003e in the series.\u003c\/li\u003e\n\u003cli\u003eUse an \u003cstrong\u003e\u003cspan style=\"color: #27ae60;\"\u003e82-Ohm terminator\u003c\/span\u003e\u003c\/strong\u003e for networks not running at 230.4K baud.\u003c\/li\u003e\n\u003cli\u003eProper termination ensures reliable communication and data integrity.\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: Are the inputs on the 1791-N4V2 configurable?\u003c\/strong\u003e\u003cbr\u003eA: Yes, all four inputs are \u003cstrong\u003e\u003cspan style=\"color: #27ae60;\"\u003eindividually selectable\u003c\/span\u003e\u003c\/strong\u003e for voltage or current.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: What type of outputs does this module have?\u003c\/strong\u003e\u003cbr\u003eA: It has two \u003cstrong\u003e\u003cspan style=\"color: #27ae60;\"\u003eanalog voltage outputs\u003c\/span\u003e\u003c\/strong\u003e with fast update rates.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: Is there protection against wiring mistakes?\u003c\/strong\u003e\u003cbr\u003eA: Yes, the outputs have \u003cstrong\u003e\u003cspan style=\"color: #27ae60;\"\u003eindefinite short-circuit protection\u003c\/span\u003e\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: What does the green LED indicate?\u003c\/strong\u003e\u003cbr\u003eA: A solid green LED shows the module is \u003cstrong\u003e\u003cspan style=\"color: #27ae60;\"\u003epowered and communicating\u003c\/span\u003e\u003c\/strong\u003e correctly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: Do you have this module in stock?\u003c\/strong\u003e\u003cbr\u003eA: Yes, we maintain stock of the original 1791-N4V2 for quick shipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQ: What is your return policy?\u003c\/strong\u003e\u003cbr\u003eA: We offer a \u003cstrong\u003e\u003cspan style=\"color: #27ae60;\"\u003e30-day return guarantee\u003c\/span\u003e\u003c\/strong\u003e on all our products.\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":47289569607938,"sku":"1791-N4V2","price":235.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7280\/6146\/files\/1791-N4V2.jpg?v=1773892913","url":"https:\/\/www.nex-auto.com\/tr\/products\/allen-bradley-1791-n4v2-analog-i-o-module","provider":"NexAuto Technology Limited","version":"1.0","type":"link"}