{"product_id":"allen-bradley-1771-al-io-adapter-module-plc-2","title":"Allen-Bradley 1771-AL IO Adapter Module PLC-2","description":"\u003cdiv\u003e\u003cp\u003eThe Allen-Bradley 1771-AL is a PLC-2 local I\/O adapter module that provides the interface between a PLC-2 controller and 1771 I\/O chassis. This adapter enables the PLC-2 CPU to address and communicate with I\/O modules mounted in 1771-series racks, acting as the local I\/O link in classic AB control architectures. Designed for use with any 1771 I\/O chassis, the 1771-AL preserves compatibility across the 1771 family and supports the standard backplane and bus addressing schemes used by PLC-2 systems. In practice, it is used to connect PLC-2 processors to distributed I\/O modules for control of sensors, actuators, and simple industrial processes within environments that still rely on 1771-series remote I\/O. The module’s purpose is to enable local I\/O expansion and interconnection, without introducing new control capabilities on its own. When sourcing, verify that your system is a PLC-2 installation and that the 1771 I\/O chassis is compatible with the 1771-AL adapter to ensure proper electrical and addressing compatibility in legacy automation setups.\u003c\/p\u003e\u003c\/div\u003e","brand":"Allen-Bradley","offers":[{"title":"Used Surplus - Excellent Condition","offer_id":46244003807466,"sku":null,"price":23.0,"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-al-io-adapter-module-plc-2","provider":"GTG Hardware","version":"1.0","type":"link"}