{"product_id":"allen-bradley-1756-cnbr-e-controlnet-redundant-module","title":"Allen-Bradley 1756-CNBR\/E ControlNet Redundant Bridge Module","description":"\u003cp\u003eThe Allen-Bradley 1756-CNBR\/E is a Series E ControlNet Bridge Redundancy module designed for the ControlLogix architecture. This single-slot interface module provides a deterministic connection between ControlLogix controllers and the ControlNet network. By utilizing dual communication channels, this module ensures high availability for scheduled I\/O data and unscheduled messaging, effectively mitigating the risk of network downtime caused by physical media failures.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-Channel Media Redundancy:\u003c\/strong\u003e Monitors signal integrity across two coaxial lines. In the event of a cable break or tap disconnection, the module automatically switches to the secondary channel to maintain continuous communication.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDeterministic Performance:\u003c\/strong\u003e Maintains a consistent 5 Mbps transmission speed, suitable for time-critical control applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Capacity:\u003c\/strong\u003e Supports up to 99 nodes on a single network and manages up to 64 concurrent system connections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible Configuration:\u003c\/strong\u003e Compatible with standard ControlLogix chassis and power supplies, facilitating integration into existing control systems.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eApplications\u003c\/h3\u003e\u003cp\u003eThis module is intended for use in industrial environments requiring high-reliability networking, such as distributed I\/O systems, multi-controller synchronization, and critical process control where network redundancy is a requirement to prevent production interruptions.\u003c\/p\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ctable\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\u003eHardware Series\u003c\/td\u003e\n\u003ctd\u003eSeries E\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNetwork Speed\u003c\/td\u003e\n\u003ctd\u003e5 Mbps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNode Capacity\u003c\/td\u003e\n\u003ctd\u003e99 Nodes max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnection Capacity\u003c\/td\u003e\n\u003ctd\u003e64 total (40-48 recommended)\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\u003eBackplane Current (5.1V)\u003c\/td\u003e\n\u003ctd\u003e970 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e0 to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure Rating\u003c\/td\u003e\n\u003ctd\u003eOpen Type\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 to internal components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChassis Insertion:\u003c\/strong\u003e Ensure the ControlLogix chassis is powered down before inserting or removing the module. Align the module with the chassis guides and seat it firmly into the backplane connector.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCabling:\u003c\/strong\u003e Use 1786-RG6 quad-shield coaxial cable for all ControlNet connections. Ensure all BNC connections are secure and properly terminated according to ControlNet network standards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrounding:\u003c\/strong\u003e Maintain proper chassis grounding to ensure noise immunity and compliance with electromagnetic compatibility requirements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnvironment:\u003c\/strong\u003e Install in an environment free from excessive dust, corrosive gases, and moisture, ensuring adequate ventilation to stay within the 60 deg C operating limit.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eQ: Is the 1756-CNBR\/E compatible with all ControlLogix chassis?\u003c\/strong\u003e\u003cbr\u003eA: Yes, it is designed for use in standard 1756 chassis including 1756-A4, A7, A10, A13, and A17 models.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: Does this module support redundant power supplies?\u003c\/strong\u003e\u003cbr\u003eA: Yes, the module is compatible with various redundant power supply configurations, including the 1756-PA75R and 1756-PSCA2 systems.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":53962519511224,"sku":"1756-CNBR\/E","price":90.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0935\/6132\/3704\/files\/wm_1_7fd84d4c-ff91-4978-ae43-e4719a071a97.jpg?v=1787338823","url":"https:\/\/www.globalpetroparts.com\/products\/allen-bradley-1756-cnbr-e-controlnet-redundant-module","provider":"Global Petro Parts Automation","version":"1.0","type":"link"}