{"product_id":"allen-bradley-1756-cnbr-industrial-automation-module-heavy-duty","title":"Allen-Bradley 1756-CNBR Industrial Automation Module - Heavy-Duty","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eWhen ControlNet network reliability is critical, the Allen-Bradley 1756-CNBR delivers redundant media capability for your ControlLogix system. This ControlNet Bridge Module features two ControlNet ports, enabling connection to both simplex and redundant networks. As part of the ControlLogix family, the 1756-CNBR interfaces the controller with high-speed ControlNet networks, supporting scheduled and unscheduled data transfer.\u003c\/p\u003e\u003cp\u003eThe 1756-CNBR operates at a communication rate of 5 Mbps and supports 40-48 Logix communication connections, with a maximum of 64 connections. It handles up to 99 nodes, making it suitable for distributed I\/O architectures and large-scale control systems.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eRockwell Automation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAllen-Bradley\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\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eControlNet communication module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNo. of Ports\u003c\/td\u003e\n\u003ctd\u003eTwo (2) ControlNet ports\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControlNet Rate of Communication\u003c\/td\u003e\n\u003ctd\u003e5 Mbps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLogix Communication Connections\u003c\/td\u003e\n\u003ctd\u003e40-48\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Connections Supported\u003c\/td\u003e\n\u003ctd\u003e64\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Number of Nodes\u003c\/td\u003e\n\u003ctd\u003e99\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current (5.1 VDC)\u003c\/td\u003e\n\u003ctd\u003e970 milliamps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current (24 VDC)\u003c\/td\u003e\n\u003ctd\u003e1.7 milliamps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation Voltage\u003c\/td\u003e\n\u003ctd\u003e30 Volts Continuous\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Dissipation (Max)\u003c\/td\u003e\n\u003ctd\u003e5.5 Watts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure\u003c\/td\u003e\n\u003ctd\u003eOpen Type\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Cable\u003c\/td\u003e\n\u003ctd\u003e1786-RG6 quad shield RG6 coaxial cable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e5.51 x 4.41 x 5.71 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e32-140 Fahrenheit (0-60 Celsius)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSlot Width\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.64 lbs (0.293 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eKey Features \u0026amp; Benefits\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRedundant Media Support:\u003c\/strong\u003e Two ControlNet ports allow connection to redundant trunk cables, preventing communication loss if a tap or trunkline is disconnected.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Throughput:\u003c\/strong\u003e 5 Mbps communication rate ensures fast data exchange for time-critical control applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eScalable Connectivity:\u003c\/strong\u003e Supports up to 64 connections and 99 nodes, accommodating medium to large distributed I\/O systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackplane Powered:\u003c\/strong\u003e Draws 970 mA at 5.1 VDC and 1.7 mA at 24 VDC, simplifying installation without external power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact Design:\u003c\/strong\u003e Single-slot module fits in standard ControlLogix chassis, saving rack space.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eIndustry Applications\u003c\/h2\u003e\u003cp\u003eThe Allen-Bradley 1756-CNBR excels in applications where ControlNet redundancy is essential. Typical use cases include:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturing Lines:\u003c\/strong\u003e Coordinating multiple PLCs and remote I\/O racks on a redundant ControlNet backbone to minimize downtime.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProcess Control:\u003c\/strong\u003e Bridging ControlLogix controllers with field devices in continuous processing plants, ensuring reliable communication.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Handling:\u003c\/strong\u003e Connecting conveyors, sorters, and robotic cells in a distributed architecture with redundant media for high availability.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation \u0026amp; Setup Guidance\u003c\/h2\u003e\u003cp\u003eInstall the 1756-CNBR into any available slot of a compatible ControlLogix chassis (1756-A4, 1756-A7, 1756-A10, 1756-A13, 1756-A17). The module requires only one slot. Use 1786-RG6 quad shield RG6 coaxial cable for trunk connections. Before connecting, verify the tap drop cable label to ensure correct tap polarity; reversed connections cause status errors and require troubleshooting. For redundant networks, connect both ControlNet ports to separate trunk cables.\u003c\/p\u003e\u003ch2\u003eCompatibility \u0026amp; Integration\u003c\/h2\u003e\u003cp\u003eThe 1756-CNBR integrates seamlessly with ControlLogix processors and supports both standard and redundant power supplies. Compatible standard power supplies include 1756-PA72\/C, 1756-PA75\/B, 1756-PB72\/C, 1756-PB75\/B, 1756-PC75\/B, and 1756-PH75\/B. For redundant power, use 1756-PA75R, 1756-PB75R, or 1756-PSCA2. The module also provides one Network Access Port (NAP) with an RJ-45 8-pin shielded connector for local programming.\u003c\/p\u003e\u003ch2\u003eSelection Guide \u0026amp; Purchasing Advice\u003c\/h2\u003e\u003cp\u003eBefore purchasing, confirm your system requires redundant ControlNet media. If a single ControlNet port suffices, consider the 1756-CNB. Verify chassis compatibility and available slot space. For guaranteed genuine Allen-Bradley 1756-CNBR modules with reliable support, choose PLC Source PRO as your supplier.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default","offer_id":44434873647203,"sku":"1756-CNBR","price":268.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0678\/8635\/0435\/files\/1756-2WS_5daf6be4-179e-4e8c-aebc-0adef7a5f79a.jpg?v=1785777212","url":"https:\/\/www.plcsourcepro.com\/ar\/products\/allen-bradley-1756-cnbr-industrial-automation-module-heavy-duty","provider":"PLC Source PRO","version":"1.0","type":"link"}