{"product_id":"allen-bradley-1771-a1b-4-slot-io-chassis-base","title":"Allen-Bradley 1771-A1B 4-Slot IO Chassis Base","description":"\u003cdiv\u003e\u003cp\u003eThe Allen-Bradley 1771-A1B four-slot universal I\/O chassis base is the back-panel-mounted foundation for 1771 I\/O modules in PLC-5 era automation, providing a compact four-slot backplane to house digital and analog I\/O modules in a single enclosure. It measures 298 x 70 x 187 mm (11.75 x 2.75 x 7.375 in) and weighs about 1.4 kg (3.0 lb), designed for secure attachment in panel or cabinet installations. The chassis accepts four 1771 I\/O modules, forming a modular expansion backplane that supports the 1771 Universal I\/O family and complements PLC-5 control configurations with remote or centralized I\/O points. As a member of the 1771 Universal I\/O ecosystem, it enables compatibility with a wide range of 1771 modules and backplane architectures designed for data exchange within 1771 I\/O systems. This base is typically used in older installations or retrofits where PLC-5 systems require additional plug-in I\/O capacity without replacing the controller.\u003c\/p\u003e\u003c\/div\u003e","brand":"Allen-Bradley","offers":[{"title":"Used Surplus - Excellent Condition","offer_id":46244002988266,"sku":null,"price":71.0,"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-a1b-4-slot-io-chassis-base","provider":"GTG Hardware","version":"1.0","type":"link"}