{"product_id":"allen-bradley-1771-ig-usnt-digital-input-module","title":"Allen-Bradley 1771-IG USNT Digital Input Module","description":"\u003cdiv\u003e\u003cp\u003eThe Allen-Bradley 1771-IG USNT Digital Input Module is a 16-point TTL input module in the 1771 Universal I\/O family, designed for PLC-5 backplanes to translate 16 discrete field signals into digital data for the controller. Each channel accepts 5 V DC TTL signals with a HIGH threshold of 2.0–5.25 V and a LOW threshold of -0.2–0.8 V, delivering typical input delay around 1 ms and drawing backplane current of about 122 mA on the 1771 bus. The module is compatible with Universal I\/O chassis such as 1771-A1B, A2B, A3B, and A4B, and it uses a 1771-WH wiring arm for field connections. In practical PLC-5 installations, it provides 16 discrete data points that map to the controller’s I\/O data table for monitoring field devices like limit switches, sensors, and simple push-buttons in automation systems.\u003c\/p\u003e\u003c\/div\u003e","brand":"Allen-Bradley","offers":[{"title":"Used Surplus - Excellent Condition","offer_id":46244009083114,"sku":null,"price":507.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0716\/8039\/3450\/files\/GTG-STOCK-079.png?v=1788727429","url":"https:\/\/gtghardware.com\/products\/allen-bradley-1771-ig-usnt-digital-input-module","provider":"GTG Hardware","version":"1.0","type":"link"}