{"product_id":"allen-bradley-1756-cn2r-b-controlnet-communication-module","title":"Allen-Bradley 1756-CN2R\/B ControlNet Communication Module","description":"\u003cp\u003eThe Allen-Bradley 1756-CN2R\/B is a high-performance ControlNet redundant bridge module engineered for the ControlLogix platform. As a Series B hardware revision, this communication interface facilitates deterministic data exchange between controllers, remote I\/O, and field devices. By utilizing a dual-channel coaxial architecture, the module ensures robust network availability, effectively mitigating the risk of operational downtime caused by cable damage or signal degradation.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRedundant Media Support:\u003c\/strong\u003e Dual BNC coaxial ports provide automatic failover capabilities, allowing the network to maintain continuous operation if one cable path experiences a fault.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Capacity Data Routing:\u003c\/strong\u003e Supports up to 131 parallel connections, including 128 dedicated Logix connections across a maximum of 99 network nodes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Performance:\u003c\/strong\u003e Operates at a consistent 5 Mbps deterministic throughput, suitable for time-critical industrial control applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated USB Interface:\u003c\/strong\u003e Includes a local USB port for convenient configuration and diagnostics.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandardized Infrastructure:\u003c\/strong\u003e Compatible with 1786-RG6 quad-shield coaxial cabling to ensure signal integrity in high-EMI environments.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eApplications\u003c\/h3\u003e\u003cp\u003eThis module is designed for demanding industrial environments requiring high-availability communication, such as process automation, manufacturing lines, and distributed control systems. It is commonly deployed in ControlLogix chassis to bridge communication between the controller and remote I\/O or other intelligent field components.\u003c\/p\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ctable border=\"1\" cellpadding=\"5\" cellspacing=\"0\"\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 Speed\u003c\/td\u003e\n\u003ctd\u003e5 Mbps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Network Nodes\u003c\/td\u003e\n\u003ctd\u003e99\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Connections\u003c\/td\u003e\n\u003ctd\u003e131\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\u003ePower 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\u003eEnsure the ControlLogix chassis is powered down before inserting or removing the module to prevent damage to the backplane pins.\u003c\/li\u003e\n\u003cli\u003eSeat the module firmly into a single slot of the 1756 series chassis; use the top and bottom connectors to secure it.\u003c\/li\u003e\n\u003cli\u003eUse only 1786-RG6 quad-shield coaxial cable for ControlNet connections to maintain network impedance and shielding standards.\u003c\/li\u003e\n\u003cli\u003eMaintain proper ventilation in the control cabinet; ensure the module is not obstructed by wiring or other components.\u003c\/li\u003e\n\u003cli\u003eHandle the module using ESD-safe practices to prevent static discharge damage to internal circuitry.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003ch3\u003eDoes this module support non-redundant configurations?\u003c\/h3\u003e\u003cp\u003eWhile the 1756-CN2R\/B is specifically designed for redundant media applications, it can be utilized in non-redundant setups, though its primary advantage is the automatic failover capability provided by the dual BNC ports.\u003c\/p\u003e\u003ch3\u003eIs this module compatible with older Series A chassis?\u003c\/h3\u003e\u003cp\u003eThe 1756-CN2R\/B is compatible with standard ControlLogix chassis assemblies (1756-A4 through 1756-A17). Always verify your firmware revision in Studio 5000\/RSLogix 5000 to ensure compatibility with your specific controller project.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":48867395764414,"sku":"1756-CN2R\/B","price":87.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/wm_1_85699b27-4ca9-4d4b-9762-be4173e225c9.jpg?v=1788913977","url":"https:\/\/www.autooiltech.com\/es\/products\/allen-bradley-1756-cn2r-b-controlnet-communication-module","provider":"AutoOilTech Limited","version":"1.0","type":"link"}