{"product_id":"allen-bradley-1756-cn2r-b-controlnet-communication-module","title":"Allen-Bradley 1756-CN2R\/B ControlLogix ControlNet Redundant Communication Module","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe Allen-Bradley 1756-CN2R\/B is a high-performance, Series B ControlNet communication bridge module engineered for the ControlLogix platform. This module facilitates deterministic data exchange between controllers, remote I\/O, drives, and other intelligent field devices. As a redundant bridge, it provides a robust communication backbone for critical control applications, ensuring high availability through dual-channel coaxial support.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRedundant Communication:\u003c\/strong\u003e Dual BNC ports allow for media redundancy, enabling the network to maintain operations seamlessly if one coaxial cable segment fails.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDeterministic Throughput:\u003c\/strong\u003e Operates at a consistent 5 Mbps speed, ensuring predictable data delivery across the ControlNet network.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Capacity:\u003c\/strong\u003e Supports up to 99 nodes on the network with a maximum of 131 total connections, including 128 dedicated Logix connections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated USB Port:\u003c\/strong\u003e Includes a local USB port for convenient configuration and diagnostics.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries B Reliability:\u003c\/strong\u003e Updated hardware revision for enhanced processing and improved stability in industrial environments.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eApplications\u003c\/h3\u003e\u003cp\u003eThis module is typically deployed in large-scale manufacturing and process control environments where network reliability is paramount. It is commonly used for distributed I\/O control, inter-controller messaging, and high-speed data synchronization in ControlLogix systems.\u003c\/p\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ctable border=\"1\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e1756-CN2R\/B\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eSeries B\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\u003eUSB Port Speed\u003c\/td\u003e\n\u003ctd\u003e12 Mbps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Nodes\u003c\/td\u003e\n\u003ctd\u003e99\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Connections\u003c\/td\u003e\n\u003ctd\u003e131 (128 Logix)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current (5.1V)\u003c\/td\u003e\n\u003ctd\u003e1300 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackplane Current (24V)\u003c\/td\u003e\n\u003ctd\u003e3 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Power Dissipation\u003c\/td\u003e\n\u003ctd\u003e6.7 Watts\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 Type\u003c\/td\u003e\n\u003ctd\u003eOpen\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHandling:\u003c\/strong\u003e This module is sensitive to electrostatic discharge (ESD). Ensure proper grounding procedures are followed before handling or installing the card.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Designed for installation in any standard 1756 ControlLogix chassis. Ensure the module is fully seated in the slot and the top\/bottom retaining clips are secured.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCabling:\u003c\/strong\u003e Use only 1786-RG6 quad-shield coaxial cable for ControlNet connections to maintain signal integrity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower:\u003c\/strong\u003e Always disconnect power from the ControlLogix chassis backplane before inserting or removing the communication module.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnvironment:\u003c\/strong\u003e Maintain adequate clearance around the chassis to ensure proper ventilation and cooling, keeping the ambient temperature within the specified 0 to 60 deg C range.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eQ: Does this module support non-redundant configurations?\u003c\/strong\u003e\u003cbr\u003eA: While the 1756-CN2R\/B is designed for redundant media applications, it can be used in non-redundant setups if only one BNC port is connected, though it is specifically built to provide the redundancy feature.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: Is this module compatible with all ControlLogix chassis?\u003c\/strong\u003e\u003cbr\u003eA: It is compatible with standard 1756 series chassis, including the 1756-A4, A7, A10, A13, and A17 models.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":44727722541144,"sku":"1756-CN2R\/B","price":87.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0670\/2039\/0488\/files\/wm_1_51d9bc63-11cc-4d62-bf8e-f3e1adef9362.jpg?v=1788579319","url":"https:\/\/www.industriaxplc.com\/ar\/products\/allen-bradley-1756-cn2r-b-controlnet-communication-module","provider":"IndustriaX Limited","version":"1.0","type":"link"}