{"product_id":"allen-bradley-1771-ia-programmable-logic-controller-module","title":"Allen-Bradley 1771-IA Programmable Logic Controller Module","description":"\u003cdiv\u003e\u003cp\u003eThe Allen-Bradley 1771-IA is an eight-point digital input module for the 1771 I\/O family, designed to interface external switches and sensors with a PLC-2 controller through a 1771 backplane. It provides eight discrete input channels that accept nominal 120 V AC or DC signals, with a per-channel current rating around 75 mA, enabling direct reading of on\/off devices in industrial environments. As part of the Series C 1771 I\/O lineup, the 1771-IA supports standard 1771 backplane addressing in compatible chassis and can be configured for half-slot, 1-slot, or 2-slot addressing within chassis A or B. This module is commonly used to monitor binary sensors such as limit switches, door switches, and other digital devices to feed the PLC with real-time input status for discrete control and monitoring tasks in factory automation. With its eight input points in a compact form factor, the 1771-IA helps consolidate wiring and simplify panel layouts while maintaining compatibility with legacy PLC-2 configurations and the broader 1771 I\/O ecosystem.\u003c\/p\u003e\u003c\/div\u003e","brand":"Allen-Bradley","offers":[{"title":"Used Surplus - Excellent Condition","offer_id":46256153198826,"sku":null,"price":651.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0716\/8039\/3450\/files\/GTG-STOCK-083.png?v=1788727429","url":"https:\/\/gtghardware.com\/products\/allen-bradley-1771-ia-programmable-logic-controller-module","provider":"GTG Hardware","version":"1.0","type":"link"}