{"product_id":"i-o-module-allen-bradley-1791-24ar","title":"I\/O Module Allen-Bradley 1791-24AR","description":"\u003ch2\u003e\u003cstrong\u003eAllen-Bradley 1791-24AR: 24-Input, 8-Relay Output Block I\/O Module\u003c\/strong\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e \u003cspan style=\"color: #2e86c1;\"\u003eAllen-Bradley\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e \u003cstrong\u003e1791-24AR\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Line:\u003c\/strong\u003e 1791 Block I\/O\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Channels:\u003c\/strong\u003e 24 AC Inputs (3 groups of 8)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Channels:\u003c\/strong\u003e 8 Relay Outputs (Normally Open contacts)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Voltage Range:\u003c\/strong\u003e 79-132V AC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNominal Input Voltage:\u003c\/strong\u003e 120V AC, ~11 mA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Off-State Leakage:\u003c\/strong\u003e 2.3 mA min @ 35V AC max\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExternal Power Supply:\u003c\/strong\u003e 85-132V AC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModule Dimensions:\u003c\/strong\u003e 3.85\"D x 4.35\"W x 6.95\"H\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.50 lbs (1.13 kg)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eRelay Output Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe eight outputs are \u003cspan style=\"color: #2e86c1;\"\u003eelectromechanical relays with NO (Normally Open) contacts\u003c\/span\u003e.\u003c\/li\u003e\n\u003cli\u003eRelay contacts can switch either \u003cspan style=\"color: #2e86c1;\"\u003eAC or DC voltage\u003c\/span\u003e, providing maximum application flexibility.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Resistive Current:\u003c\/strong\u003e 1.0 A @ 20-132V AC or 20-30V DC.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Rating depends on Load Type:\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e86c1;\"\u003eResistive Load:\u003c\/span\u003e Up to 1.0 A (AC or DC, as above). At 0.2 A, voltage can be up to 125V DC.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e86c1;\"\u003eInductive AC Load (cos Φ = 0.4):\u003c\/span\u003e 0.5 A @ 20-132V AC.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e86c1;\"\u003eInductive DC Load (L\/R = 7 ms):\u003c\/span\u003e 1.0 A @ 20-30V DC.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #2e86c1;\"\u003eDC Steady State:\u003c\/span\u003e 0.1 A @ 125V DC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003eAlways \u003cspan style=\"color: #2e86c1;\"\u003erefer to the load-specific ratings\u003c\/span\u003e to ensure reliable and safe operation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eInstallation \u0026amp; Integration\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe \u003cstrong\u003e1791-24AR\u003c\/strong\u003e is designed for \u003cspan style=\"color: #2e86c1;\"\u003eRemote I\/O architecture\u003c\/span\u003e, acting as an adapter on the network.\u003c\/li\u003e\n\u003cli\u003eIt requires connection to an RIO scanner in a compatible Allen-Bradley PLC chassis.\u003c\/li\u003e\n\u003cli\u003eInstallation follows standard 1791 series practices for mounting and wiring.\u003c\/li\u003e\n\u003cli\u003eUse appropriate gauge wiring for both the 120V AC inputs and the relay output load circuits.\u003c\/li\u003e\n\u003cli\u003eConsider inrush currents and load types (inductive, resistive, lamp) when sizing outputs.\u003c\/li\u003e\n\u003cli\u003eFor inductive loads, external suppression (like flyback diodes for DC) is recommended to protect relay contacts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat makes the 1791-24AR different from the 1791-24A8?\u003c\/strong\u003e\u003cbr\u003eThe key difference is the output type. The \u003cstrong\u003e1791-24AR\u003c\/strong\u003e has \u003cspan style=\"color: #2e86c1;\"\u003e8 relay outputs\u003c\/span\u003e that can switch AC or DC, while the 1791-24A8 has 8 solid-state AC outputs only.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat voltages can the relay outputs on the 1791-24AR switch?\u003c\/strong\u003e\u003cbr\u003eThe relay contacts are versatile. They can switch \u003cspan style=\"color: #2e86c1;\"\u003eAC voltage (20-132V AC)\u003c\/span\u003e or \u003cspan style=\"color: #2e86c1;\"\u003eDC voltage (20-125V DC)\u003c\/span\u003e, depending on the current rating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat is the maximum current for the relay outputs?\u003c\/strong\u003e\u003cbr\u003eThe maximum current is \u003cspan style=\"color: #2e86c1;\"\u003e1.0 Amp for resistive loads\u003c\/span\u003e at lower voltages. The rating decreases for inductive loads or higher voltages—please check the detailed specs above.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAre the relay outputs on this module fused internally?\u003c\/strong\u003e\u003cbr\u003eNo, the relay output circuits are \u003cspan style=\"color: #2e86c1;\"\u003enot internally fused\u003c\/span\u003e. External fusing or circuit protection is required for each output load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDo you have this module in stock, and how do you ship?\u003c\/strong\u003e\u003cbr\u003eYes, we stock the \u003cstrong\u003e1791-24AR\u003c\/strong\u003e and ship \u003cspan style=\"color: #2e86c1;\"\u003ewithin 3-5 days\u003c\/span\u003e via major carriers like DHL, FedEx, or UPS.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCan I return the module if it doesn't suit my application?\u003c\/strong\u003e\u003cbr\u003eAbsolutely. We offer a \u003cspan style=\"color: #2e86c1;\"\u003e30-day return period\u003c\/span\u003e for products in original condition.\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\u003cbr\u003ePhone: \u003ca href=\"https:\/\/wa.me\/8615392429628\" target=\"_blank\"\u003e+86 153 9242 9628\u003c\/a\u003e\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":47285602877698,"sku":"1791-24AR","price":215.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7280\/6146\/files\/1791-24AR.jpg?v=1770797708","url":"https:\/\/www.nex-auto.com\/kk\/products\/i-o-module-allen-bradley-1791-24ar","provider":"NexAuto Technology Limited","version":"1.0","type":"link"}