{"product_id":"allen-bradley-1756-dhriok-controllogix-dh-rio-communication-module","title":"AB Allen-Bradley 1756-DHRIOK ControlLogix DH+\/RIO Communication Module","description":"\u003ch3\u003eProduct Summary\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eAllen-Bradley 1756-DHRIOK\u003c\/strong\u003e is a \u003cstrong\u003eControlLogix DH+\/RIO Communication Module Kit\u003c\/strong\u003e by Rockwell Automation. It provides \u003cstrong\u003e2 configurable channels\u003c\/strong\u003e supporting both \u003cstrong\u003eData Highway Plus (DH+)\u003c\/strong\u003e messaging and \u003cstrong\u003eRemote I\/O (RIO)\u003c\/strong\u003e scanner functionality. The \u003cstrong\u003e-K suffix\u003c\/strong\u003e denotes a kit configuration that includes the module and terminal blocks for quick installation. It enables communication between ControlLogix controllers and legacy DH+ networks, PLC-5 processors, SLC 500 systems, and remote I\/O adapters.\u003c\/p\u003e\n\n\u003ch3\u003eCore Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModel Number:\u003c\/strong\u003e 1756-DHRIOK\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e DH+\/RIO Bridge\/Scanner Communication Module Kit\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChannels:\u003c\/strong\u003e 2 (independently configurable for DH+ or RIO)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCommunication Protocols:\u003c\/strong\u003e Data Highway Plus (DH+), Remote I\/O (RIO), CIP Messaging\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBaud Rates:\u003c\/strong\u003e 57.6 kbps, 115.2 kbps, 230.4 kbps\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConnections:\u003c\/strong\u003e Up to 32 Logix connections; 32 RIO rack numbers per channel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBackplane Current:\u003c\/strong\u003e 850 mA at 5.1V; 1.7 mA at 24V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower Dissipation:\u003c\/strong\u003e 4.4 W typical\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.38 kg\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Allen-Bradley by Rockwell Automation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eElectrical \u0026amp; Functional Characteristics\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChannel Configuration:\u003c\/strong\u003e Each channel independently set via rotary switches for DH+ or RIO mode\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDH+ Node Address:\u003c\/strong\u003e 00–77 octal, set via front-panel switches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRIO Scanner:\u003c\/strong\u003e Scans up to 32 rack numbers per channel in round-robin fashion\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMessage Routing:\u003c\/strong\u003e Supports bridging between DH+ and other networks (ControlNet, EtherNet\/IP)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBlock Transfer:\u003c\/strong\u003e Supports block-transfer read\/write with remote I\/O adapters\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStatus Indicators:\u003c\/strong\u003e Module status, channel A\/B activity, and diagnostic LEDs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCable:\u003c\/strong\u003e Belden 9463 twinaxial (standard); Belden 89463 (XT version)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSystem Integration \u0026amp; Compatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Platform:\u003c\/strong\u003e ControlLogix 1756 chassis\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible Devices:\u003c\/strong\u003e PLC-5, SLC 500, 1794-ASB, 1771-ASB, 1747-ASB, PanelView terminals, 1336 drives\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSoftware:\u003c\/strong\u003e RSLogix 5000 \/ Studio 5000 Logix Designer\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Rotary switches for network type and node address; software configuration for RIO adapter lists\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHot Swap:\u003c\/strong\u003e Supports removal and insertion under power (RIUP)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eKeying:\u003c\/strong\u003e Electronic keying prevents incorrect module insertion\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRelated Parts:\u003c\/strong\u003e 1756-DHRIO (module only), 1756-DHRIOXT (Xtreme temperature), 1756-RIO (RIO only module)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eEnvironmental \u0026amp; Operational Limits\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e 0°C to 60°C (32°F to 140°F)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStorage Temperature:\u003c\/strong\u003e -40°C to +85°C (-40°F to 185°F)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHumidity:\u003c\/strong\u003e 5% to 95% RH, non-condensing\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVibration:\u003c\/strong\u003e 2 m\/s², 10 to 500 Hz\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShock:\u003c\/strong\u003e 30G operating; 50G non-operating\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApprovals:\u003c\/strong\u003e CE, CSA, KC (KCC), RCM, ATEX (Zone 2 with certified enclosure), Marine\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIndustrial Applications\u003c\/h3\u003e\n\u003cp\u003eWidely deployed in manufacturing modernization projects, legacy PLC-5 migrations, distributed I\/O systems, SCADA networks, and process control applications requiring integration between ControlLogix platforms and existing DH+ or Remote I\/O infrastructure.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\n\u003ch4\u003eWhat is the 1756-DHRIOK used for?\u003c\/h4\u003e\n\u003cp\u003eIt is a communication module kit that bridges ControlLogix controllers to legacy \u003cstrong\u003eData Highway Plus (DH+)\u003c\/strong\u003e networks and \u003cstrong\u003eRemote I\/O (RIO)\u003c\/strong\u003e devices, enabling migration and coexistence with older Allen-Bradley systems.\u003c\/p\u003e\n\n\u003ch4\u003eWhat does the -K suffix mean?\u003c\/h4\u003e\n\u003cp\u003eThe \u003cstrong\u003e-K\u003c\/strong\u003e indicates a kit configuration that includes the module and terminal blocks. The \u003cstrong\u003e1756-DHRIO\u003c\/strong\u003e is the module only.\u003c\/p\u003e\n\n\u003ch4\u003eCan both channels run different protocols simultaneously?\u003c\/h4\u003e\n\u003cp\u003eYes — each channel is \u003cstrong\u003eindependently configurable\u003c\/strong\u003e. For example, Channel A can run DH+ while Channel B runs RIO scanner mode.\u003c\/p\u003e\n\n\u003ch4\u003eWhat cable do I need for the DH+\/RIO network?\u003c\/h4\u003e\n\u003cp\u003eUse \u003cstrong\u003eBelden 9463\u003c\/strong\u003e twinaxial cable for standard installations. For Xtreme temperature applications, use \u003cstrong\u003eBelden 89463\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch4\u003eWhat are the related part numbers?\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1756-DHRIO — DH+\/RIO module only\u003c\/li\u003e\n  \u003cli\u003e1756-DHRIOK — DH+\/RIO module kit with terminal blocks (this part)\u003c\/li\u003e\n  \u003cli\u003e1756-DHRIOXT — Xtreme temperature version (-20°C to +70°C)\u003c\/li\u003e\n  \u003cli\u003e1756-RIO — Remote I\/O only communication module\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen Bradley","offers":[{"title":"Default Title","offer_id":53683958317240,"sku":"1756-DHRIOK","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0935\/6132\/3704\/files\/1756-DHRIOK.png?v=1782974521","url":"https:\/\/www.globalpetroparts.com\/products\/allen-bradley-1756-dhriok-controllogix-dh-rio-communication-module","provider":"Global Petro Parts Automation","version":"1.0","type":"link"}