{"product_id":"allen-bradley-1771-iad-16-point-dc-input-module","title":"Allen-Bradley 1771-IAD 16-Point DC Input Module","description":"\u003cdiv\u003e\u003cp\u003eAllen-Bradley 1771-IAD is a 16-point digital input module for PLC-5 systems that accepts 120‑V AC or DC input signals. It provides sixteen input channels for connection to field devices such as sensors and switch contacts, delivering binary status to the PLC-5 backplane. The input voltage range is approximately 79–138 V for both AC and DC operation, with 120 V nominal in many plant circuits. The module is installed in a PLC-5 1771 I\/O chassis and uses the 1771 wiring arm (1771-WH) for field wiring connections. As part of the 1771 Universal I\/O family, it supports expansion of legacy PLC-5 installations that rely on 120 V AC\/DC control circuits. Documentation references the 1771-IAD Series C variant, which is designed to operate with the PLC-5 backplanes supported by 16-point AC\/DC inputs. The 1771-IAD consolidates sixteen input points into a single module, simplifying wiring and reducing cabinet space when upgrading or expanding PLC-5‑based controls. Typical applications include reading door interlocks, limit switches, proximity sensors, and other 120 V control devices across machines and conveyors in manufacturing environments.\u003c\/p\u003e\u003c\/div\u003e","brand":null,"offers":[{"title":"Used Surplus - Excellent Condition","offer_id":51704726225198,"sku":null,"price":29.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0818\/1038\/files\/Ebay_website_image_9cab1117-924d-4938-9c7b-4f686f4028d4.jpg?v=1770149136","url":"https:\/\/plgautomation.com\/products\/allen-bradley-1771-iad-16-point-dc-input-module","provider":"PLG Automation ","version":"1.0","type":"link"}