{"product_id":"allen-bradley-1756-dhrio-discrete-high-density-digital-io-module","title":"Allen-Bradley 1756-DHRIO Discrete High Density Digital IO Module","description":"\u003cdiv\u003e\u003cp\u003eThe Allen-Bradley 1756-DHRIO is a dual‑channel Data Highway Plus (DH+) remote I\/O scanner\/adapter module for ControlLogix backplanes. Each of its two channels can be configured in hardware and software to operate as a DH+ network interface or as a Remote I\/O (RIO) scanner\/adapter, enabling bridging between legacy DH+ devices or remote I\/O racks and a ControlLogix chassis. The module occupies a single backplane slot and uses three terminal blocks to connect the two channels and the local programming interface, providing flexible wiring options in compact installations. As a remote I\/O interface, it transfers digital I\/O data between a DH+\/RIO network and the main controller, supporting standard DH+ and Remote I\/O data paths. The 1756‑DHRIO offers two independently configurable ports, allowing one channel to DH+ and the other to RIO if needed, which can simplify migrations from older I\/O architectures to ControlLogix. This module is part of Rockwell Automation’s 1756 ControlLogix family. Note that Rockwell Automation announced the DH+\/RIO module line, including the 1756-DHRIO, was discontinued and no longer available for sale as of December 31, 2024, so availability may be limited to remaining stock or used markets. Typical applications include connecting legacy DH+ devices or Remote I\/O racks to a ControlLogix controller, enabling data exchange for discrete digital I\/O and simple telemetry across DH+ or Remote I\/O networks while preserving existing field devices and wiring.\u003c\/p\u003e\u003c\/div\u003e","brand":"Allen-Bradley","offers":[{"title":"New","offer_id":51658948247854,"sku":null,"price":1015.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0818\/1038\/files\/Ebay_website_image_ea3e2cb7-6e43-43e7-8b6d-27bf29c6d136.jpg?v=1769525822","url":"https:\/\/plgautomation.com\/products\/allen-bradley-1756-dhrio-discrete-high-density-digital-io-module","provider":"PLG Automation ","version":"1.0","type":"link"}