{"product_id":"1791-16a0-allen-bradley-block-i-o-120v-ac-input-module","title":"1791-16A0 Allen-Bradley Block I\/O 120V AC Input Module","description":"\u003ch2\u003eAllen‑Bradley 1791‑16A0 120V AC Input Block I\/O Module\u003c\/h2\u003e\n\u003ch3\u003eKey Technical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput channels:\u003c\/strong\u003e 16 (two groups of eight), 79‑132 VAC, 47‑63 Hz; nominal 120 VAC.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput on‑state current:\u003c\/strong\u003e 5 mA minimum at 79 V; off‑state current ≤ 2.3 mA.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOff‑state voltage:\u003c\/strong\u003e Maximum 35 VAC ensures reliable off‑state detection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExternal power required:\u003c\/strong\u003e 85‑132 VAC, 47‑63 Hz, 150 mA continuous.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurge current:\u003c\/strong\u003e 10 A for 50 ms, repeatable every two seconds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature rating:\u003c\/strong\u003e Operates up to 60 °C (140 °F).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation, Mounting, and Wiring\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMount the \u003cstrong\u003e1791‑16A0\u003c\/strong\u003e vertically or horizontally. Maintain 2 inches (58 cm) clearance on all sides for adequate ventilation.\u003c\/li\u003e\n\u003cli\u003eMaximum output rating (auxiliary supply) is 600 mA at 30 °C, derating to 300 mA at 60 °C.\u003c\/li\u003e\n\u003cli\u003eThe block I\/O contains built‑in functionalities of an I\/O rack, adapter, and power supply, simplifying installation.\u003c\/li\u003e\n\u003cli\u003eCompatible with 1771 series output modules (e.g., 1771‑OAN, 1771‑OD16, 1771‑ODD, 1771‑ODZ) when off‑state leakage and voltage drop requirements match.\u003c\/li\u003e\n\u003cli\u003eUse appropriate field wiring (14 AWG recommended) for reliable connections.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat is the input voltage range of the 1791‑16A0?\u003c\/strong\u003e\u003cbr\u003eIt accepts 79‑132 VAC, 47‑63 Hz, with a nominal 120 VAC. External power must be 85‑132 VAC.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHow are the inputs grouped?\u003c\/strong\u003e\u003cbr\u003eThe \u003cstrong\u003e1791‑16A0\u003c\/strong\u003e has two isolated groups of eight inputs each.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhich field devices can I connect?\u003c\/strong\u003e\u003cbr\u003eIt works with proximity switches, limit switches, selector switches, float switches, pushbutton switches, and auxiliary contacts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat are the clearance requirements for mounting?\u003c\/strong\u003e\u003cbr\u003eAllow at least 2 inches (58 cm) of free space on all sides for proper airflow and cooling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIs this module compatible with 1771 output modules?\u003c\/strong\u003e\u003cbr\u003eYes, with modules like 1771‑OAN, 1771‑OD16, 1771‑ODD, and 1771‑ODZ, provided the off‑state leakage current is below 2.3 mA and the on‑state voltage meets requirements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHow does the 1791‑16A0 communicate with a controller?\u003c\/strong\u003e\u003cbr\u003eIt installs in a daisy‑chain configuration to a scanner in the network; inputs are asynchronously scanned and transferred to the controller.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDo you offer same‑day shipping?\u003c\/strong\u003e\u003cbr\u003eWe dispatch within five days via FedEx, UPS, or DHL. Stock is available.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"margin-top: 2em;\"\u003eFor further assistance, contact our sales team: \u003ca href=\"mailto:sales@nex-auto.com\"\u003esales@nex-auto.com\u003c\/a\u003e or \u003ca rel=\"noopener\" href=\"https:\/\/wa.me\/8615392429628\" target=\"_blank\"\u003e+86 153 9242 9628\u003c\/a\u003e (WhatsApp).\u003cbr\u003ePartner with NexAuto Technology Limited: \u003ca rel=\"noopener\" href=\"https:\/\/www.nex-auto.com\/\" target=\"_blank\"\u003ehttps:\/\/www.nex-auto.com\/\u003c\/a\u003e\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":45827280830625,"sku":"1791-16A0","price":223.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0673\/5390\/3265\/files\/1791-16A0.jpg?v=1773736203","url":"https:\/\/www.autonexcontrol.com\/fr\/products\/1791-16a0-allen-bradley-block-i-o-120v-ac-input-module","provider":"AutoNex Controls Limited ","version":"1.0","type":"link"}