{"product_id":"allen-bradley-1756-dhrio-controllogix-dh-plus-and-rio-communications-module","title":"Allen-Bradley 1756-DHRIO ControlLogix DH Plus and RIO Communications Module","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp\u003eThe Allen-Bradley 1756-DHRIO is a high-performance ControlLogix communication module designed to bridge data across Data Highway Plus (DH+) and Remote I\/O (RIO) networks. As part of the Rockwell Automation ControlLogix platform, this module facilitates seamless information exchange and messaging between legacy controllers like PLC-5 and SLC 500 systems and modern ControlLogix architecture.\u003c\/p\u003e\n\u003cp\u003eEquipped with dual independent communication channels, the 1756-DHRIO module can act as a bridge across multiple chassis and networks without requiring a controller in every local rack. It supports baud rates of 57.6 Kbps, 115.2 Kbps, and 230.4 Kbps on its RIO links, offering robust connectivity for complex industrial automation infrastructures.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDual-channel configuration supporting both Data Highway Plus (DH+) and Remote I\/O (RIO) protocols.\u003c\/li\u003e\n  \u003cli\u003eSupports up to 32 DH+ messages per channel and 32 logical rack connections per remote I\/O channel.\u003c\/li\u003e\n  \u003cli\u003eSelectable communication speeds of 57.6 Kbps, 115.2 Kbps, and 230.4 Kbps.\u003c\/li\u003e\n  \u003cli\u003eBackplane compatibility with standard ControlLogix chassis for seamless data routing.\u003c\/li\u003e\n  \u003cli\u003eDIN rail or direct backpanel mounting capability within the 1756 system ecosystem.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eBridging legacy PLC-5 and SLC 500 networks with modern ControlLogix PAC systems.\u003c\/li\u003e\n  \u003cli\u003eDistributed industrial control systems requiring remote I\/O rack scanning and block-transfer communication.\u003c\/li\u003e\n  \u003cli\u003ePlant-wide cell-level data sharing and system integration.\u003c\/li\u003e\n  \u003cli\u003eSCADA and supervisory control network expansion.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eParameter\u003c\/th\u003e\n      \u003cth\u003eSpecification\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eManufacturer\u003c\/td\u003e\n      \u003ctd\u003eAllen-Bradley \/ Rockwell Automation\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eExact Model\u003c\/td\u003e\n      \u003ctd\u003e1756-DHRIO\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eProduct Type\u003c\/td\u003e\n      \u003ctd\u003eCommunications Module\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003ePlatform\u003c\/td\u003e\n      \u003ctd\u003eControlLogix (1756 Series)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eCommunication Protocols\u003c\/td\u003e\n      \u003ctd\u003eData Highway Plus (DH+), Remote I\/O (RIO)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eBaud Rates (DH+)\u003c\/td\u003e\n      \u003ctd\u003e57.6 Kbps\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eBaud Rates (RIO)\u003c\/td\u003e\n      \u003ctd\u003e57.6 Kbps, 115.2 Kbps, 230.4 Kbps\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eBackplane Current Draw\u003c\/td\u003e\n      \u003ctd\u003e1.7 mA at 5V DC, 850 mA at 24V DC\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003ePower Dissipation\u003c\/td\u003e\n      \u003ctd\u003e4.5 W max\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eThermal Dissipation\u003c\/td\u003e\n      \u003ctd\u003e15.4 BTU\/hr max\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eRecommended Cable\u003c\/td\u003e\n      \u003ctd\u003eBelden 89463 twinaxial\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eCountry of Origin\u003c\/td\u003e\n      \u003ctd\u003eUnited States\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eConnections \/ Interfaces\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eTwo 3-pin phoenix-style removable screw terminal plugs for DH+ and RIO network connections.\u003c\/li\u003e\n  \u003cli\u003eControlLogix backplane interface connector for direct insertion into any slot of a 1756 chassis.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cp\u003eEnsure the ControlLogix chassis power supply is turned off before installing or removing the 1756-DHRIO module. Set the network type and node address switches prior to mounting the module into the chassis. Connect the Belden 89463 twinaxial cable to the appropriate channel terminals, ensuring proper termination resistors are installed at the first and last physical nodes of the daisy-chain network.\u003c\/p\u003e\n\n\u003ch3\u003eCompliance and Certifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eUL Listed Industrial Control Equipment\u003c\/li\u003e\n  \u003cli\u003eCE Compliant for EMC Directive\u003c\/li\u003e\n  \u003cli\u003eC-Tick Certified\u003c\/li\u003e\n  \u003cli\u003ehazardous location approvals (Class I, Division 2)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":53770305732971,"sku":"1756-DHRIO","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/1756-DHRIO_1200x1200_34dca2ce-77aa-4677-a7ae-dc18a29cb34b.jpg?v=1787740814","url":"https:\/\/www.plcprotech.com\/products\/allen-bradley-1756-dhrio-controllogix-dh-plus-and-rio-communications-module","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}