{"product_id":"allen-bradley-1756-dnb-devicenet-scanner-module","title":"Allen-Bradley 1756-DNB ControlLogix DeviceNet Communication Module","description":"\u003cp\u003eThe Allen-Bradley 1756-DNB is a high-performance communication module designed for the ControlLogix platform, serving as a dedicated DeviceNet scanner. It enables seamless integration between ControlLogix processors and a wide array of DeviceNet-compatible field devices, including motor starters, drives, sensors, actuators, and distributed I\/O systems.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFunctions as a DeviceNet scanner for ControlLogix chassis environments.\u003c\/li\u003e\n\u003cli\u003eSupports communication with up to 64 DeviceNet nodes (addresses 00-63).\u003c\/li\u003e\n\u003cli\u003eConfigurable communication rates: 125 Kbps, 250 Kbps, and 500 Kbps with automatic baud rate detection.\u003c\/li\u003e\n\u003cli\u003eIntegrated network diagnostics and status monitoring via front-panel indicators.\u003c\/li\u003e\n\u003cli\u003eBackplane-powered operation with support for remote rack mounting via bridging modules.\u003c\/li\u003e\n\u003cli\u003eSupports Automatic Device Replacement (ADR) for simplified maintenance.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eApplications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eAutomotive Production: Weld cells, assembly sensors, and conveyor control.\u003c\/li\u003e\n\u003cli\u003eOil \u0026amp; Gas: Telemetry, valve manifold control, and field instrumentation.\u003c\/li\u003e\n\u003cli\u003eMetals \u0026amp; Mining: High-vibration machinery, sorters, and heavy-duty processing gear.\u003c\/li\u003e\n\u003cli\u003eWater \u0026amp; Wastewater: Pump control, flow metering, and remote processing instruments.\u003c\/li\u003e\n\u003cli\u003eWarehouse \u0026amp; Fulfillment: AGV routing, sortation systems, and conveyor networks.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e1756-DNB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eControlLogix\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current (5.1V DC)\u003c\/td\u003e\n\u003ctd\u003e350 mA - 400 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current (24V DC)\u003c\/td\u003e\n\u003ctd\u003e210 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Thermal Dissipation\u003c\/td\u003e\n\u003ctd\u003e19.8 BTU\/hr (approx. 5.8 Watts)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Voltage\u003c\/td\u003e\n\u003ctd\u003e30V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Network Distance (125 Kbps)\u003c\/td\u003e\n\u003ctd\u003e500 meters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Network Distance (250 Kbps)\u003c\/td\u003e\n\u003ctd\u003e250 meters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Network Distance (500 Kbps)\u003c\/td\u003e\n\u003ctd\u003e100 meters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eESD Protection:\u003c\/strong\u003e Always use a grounded wrist strap when handling the module to prevent electrostatic discharge damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHot-Swapping:\u003c\/strong\u003e ControlLogix modules support RIUP (Removal and Insertion Under Power). However, you must disconnect the DeviceNet plug before removing the module to prevent electrical transients from affecting the network.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTermination:\u003c\/strong\u003e The DeviceNet trunk line requires two 121-ohm termination resistors at the extreme ends of the network.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrounding:\u003c\/strong\u003e The network shield must be grounded at a single point only, typically at the DeviceNet power supply, to prevent ground loops.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Use RSNetWorx for DeviceNet to map I\/O parameters and configure device settings.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003ch3\u003eWhat is the primary function of the 1756-DNB?\u003c\/h3\u003e\u003cp\u003eThe 1756-DNB acts as a bridge and scanner, allowing a ControlLogix controller to exchange data with distributed field devices over a DeviceNet network.\u003c\/p\u003e\u003ch3\u003eCan this module be used in a remote chassis?\u003c\/h3\u003e\u003cp\u003eYes, the module can operate in a remote rack without a local CPU, provided there is a communication bridge (such as an EtherNet\/IP or ControlNet module) in the same chassis to route data to the master controller.\u003c\/p\u003e\u003ch3\u003eHow do I set the baud rate?\u003c\/h3\u003e\u003cp\u003eThe module features Autobaud functionality to detect the network speed, or it can be manually configured via the front-panel buttons or through the RSLogix 5000 \/ Studio 5000 software environment.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":51020078973180,"sku":"1756-DNB","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/9983\/1292\/files\/wm_1_eeaaafe1-fb5f-411d-b3c4-68b8b590f611.jpg?v=1787847714","url":"https:\/\/www.electronicplc.com\/ar\/products\/allen-bradley-1756-dnb-devicenet-scanner-module","provider":"Electronic PLC","version":"1.0","type":"link"}