{"product_id":"allen-bradley-1756-cnbr-e-controlnet-redundant-module","title":"Allen-Bradley 1756-CNBR\/E ControlNet Redundant Bridge Module","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThe Allen-Bradley 1756-CNBR\/E is a high-performance ControlNet Bridge module from the Series E hardware generation, specifically designed for the ControlLogix automation platform. This module facilitates deterministic communication between ControlLogix processors and remote I\/O chassis, providing essential media redundancy to maintain network integrity. By utilizing dual communication channels, the 1756-CNBR\/E ensures that scheduled I\/O data and unscheduled messaging persist even in the event of a localized cable failure or tap disconnection.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia Redundancy:\u003c\/strong\u003e Dual-channel architecture allows for instantaneous failover between coaxial lines, preventing system downtime during physical network faults.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDeterministic Throughput:\u003c\/strong\u003e Maintains a constant 5 Mbps data rate, critical for time-sensitive control applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eScalable Architecture:\u003c\/strong\u003e Supports up to 99 nodes on a single ControlNet segment, with a capacity for 64 concurrent system connections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLogix Integration:\u003c\/strong\u003e Provides 40 to 48 dedicated Logix communication connections and 20 buffers for unconnected messaging, ensuring efficient data handling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible Configuration:\u003c\/strong\u003e Features two BNC coaxial ports for redundant media and one RJ45 port for supplemental connectivity.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ctable border=\"1\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e1756-CNBR\/E\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eSeries E\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Rate\u003c\/td\u003e\n\u003ctd\u003e5 Mbps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Node Capacity\u003c\/td\u003e\n\u003ctd\u003e99 Nodes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Connections\u003c\/td\u003e\n\u003ctd\u003e64\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current (5.1V)\u003c\/td\u003e\n\u003ctd\u003e970 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current (24V)\u003c\/td\u003e\n\u003ctd\u003e1.7 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Dissipation\u003c\/td\u003e\n\u003ctd\u003e5.5 Watts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e0 to 60 degC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Voltage\u003c\/td\u003e\n\u003ctd\u003e30V (Basic Insulation)\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 utilize a grounded wrist strap or similar ESD-preventative measures when handling the module to prevent damage to sensitive internal circuitry.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChassis Seating:\u003c\/strong\u003e The module occupies a single slot in a standard 1756 ControlLogix chassis. Ensure the module is fully seated and the top\/bottom retaining latches are locked before applying power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Requirements:\u003c\/strong\u003e Verify that the chassis power supply is rated to handle the additional 5.5W load of the module.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCable Management:\u003c\/strong\u003e Use 1786-RG6 quad-shield coaxial cabling. Ensure cables are routed away from high-voltage lines or high-EMI sources to maintain signal integrity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRedundancy Setup:\u003c\/strong\u003e When implementing redundancy, ensure both channel A and channel B are connected to independent trunk lines to maximize fault tolerance.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eDoes this module require a specific firmware version?\u003c\/strong\u003e\u003cbr\u003eThe 1756-CNBR\/E Series E hardware is generally compatible with standard ControlLogix firmware revisions; however, always verify compatibility with your specific controller firmware version via the Studio 5000 or RSLogix 5000 software environment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan this module be hot-swapped?\u003c\/strong\u003e\u003cbr\u003eYes, the ControlLogix system supports Removal and Insertion Under Power (RIUP). Ensure the area is non-hazardous and proper safety protocols are followed before removing or inserting the module into an active chassis.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":44701561716824,"sku":"1756-CNBR\/E","price":90.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0670\/2039\/0488\/files\/wm_1_4a6a484c-df15-4564-bb06-9927d19ddf2c.jpg?v=1788381961","url":"https:\/\/www.industriaxplc.com\/ar\/products\/allen-bradley-1756-cnbr-e-controlnet-redundant-module","provider":"IndustriaX Limited","version":"1.0","type":"link"}