{"product_id":"allen-bradley-1756-dhrio-controllogix-communication-module","title":"Allen-Bradley 1756-DHRIO ControlLogix Communication Module","description":"\u003cdiv\u003e\u003cp\u003eThe Allen-Bradley 1756-DHRIO is a DH+\/RIO remote I\/O communication interface module for Rockwell's ControlLogix platform. It enables a ControlLogix CPU to communicate with remote I\/O devices across a Data Highway Plus network, acting as a DH+ remote I\/O scanner that bridges legacy DH+ devices with modern ControlLogix controllers. The module installs in a 1756 ControlLogix chassis and is configured via Rockwell software to participate in a remote I\/O network, enabling data exchange with remote racks and devices on the DH+ bus. Typical uses include linking older DH+ peripherals to a ControlLogix system, extending I\/O reach without replacing existing devices. Rockwell has discontinued sales of the 1756-DHRIO and related modules, with the discontinuation effective December 31, 2024; for new designs, consider migration paths to current DH+\/RIO alternatives or to more modern communication options, while existing installations can continue to operate with supported firmware where available.\u003c\/p\u003e\u003c\/div\u003e","brand":"Allen-Bradley","offers":[{"title":"Used Surplus - Excellent Condition","offer_id":51658948575534,"sku":null,"price":381.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0818\/1038\/files\/Ebay_website_image_e5f8b639-f809-4e3a-b0b0-690772e59eee.jpg?v=1769525828","url":"https:\/\/plgautomation.com\/products\/allen-bradley-1756-dhrio-controllogix-communication-module","provider":"PLG Automation ","version":"1.0","type":"link"}