{"product_id":"allen-bradley-controllogix-controlnet-bridge-module-1756-cn2rk","title":"Allen Bradley ControlLogix ControlNet Bridge Module | 1756-CN2RK","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen Bradley 1756-CN2RK\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eserves as a high-performance ControlNet communication bridge within the ControlLogix ecosystem. This module facilitates deterministic, high-speed data exchange between controllers and I\/O devices across a redundant media topology. We provide this unit as\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New and Original\u003c\/strong\u003e, featuring factory-applied\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eConformal Coating\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eto ensure long-term hardware integrity in corrosive or humid industrial atmospheres.\u003c\/p\u003e\n\u003ch2\u003ePart Number Breakdown\u003c\/h2\u003e\n\u003cp\u003eThe 1756-CN2RK alphanumeric code identifies specific technical capabilities:\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e1756:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIdentifies the ControlLogix platform compatibility.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCN:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDesignates the ControlNet protocol interface.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e2:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIndicates the enhanced \"High Performance\" series with expanded connection capacity.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eR:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSpecifies Redundant media support (Dual BNC channels).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eK:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDenotes\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eConformal Coating\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efor environmental hardening.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cp\u003eThis module manages complex network traffic with the following engineering parameters:\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eFeature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eNetwork Protocol\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eControlNet\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCommunication Rate\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e5 Mbps\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eChannels\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eDual (Redundant Media Support)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eLogix Connections\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e128 Maximum\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eEnvironmental Protection\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eConformal Coated PCB\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eSlot Width\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eSingle Slot\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.88 lbs (0.40 kg)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eModule Type\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eCommunication Bridge \/ Rack Mount\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eEngineering Advantages\u003c\/h2\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eRedundant Data Pathways:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDual BNC ports allow for media redundancy. If a primary cable fails, the module switches to the secondary path instantly, preventing process downtime and maintaining deterministic control.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eAggressive Corrosion Resistance:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThe \"K\" version conformal coating protects internal circuitry from salt spray, humidity, and chemical contaminants. This makes it essential for wastewater treatment, oil and gas, and chemical processing facilities.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eExpanded Connection Density:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSupporting up to 128 Logix connections, this module handles massive I\/O counts and multi-controller interlocking without bottlenecking the backplane.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDeterministic Performance:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eUnlike standard Ethernet, this module utilizes a scheduled Network Update Time (NUT) to guarantee that critical control data arrives precisely when the logic demands it, eliminating network jitter.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFAQs\u003c\/h2\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the benefit of the \"K\" suffix on the 1756-CN2RK?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe \"K\" signifies a conformal coating. This protective layer shields the electronic components from environmental hazards like moisture and corrosive vapors, significantly extending the module's lifespan in harsh plant conditions.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this module support redundant controllers?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The 1756-CN2RK supports redundant ControlLogix controller architectures. It facilitates the high-speed synchronization required to maintain a seamless transition between primary and secondary processors.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCan I replace a 1756-CNB with this module?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 1756-CN2RK offers significantly higher performance and connection capacity than the legacy 1756-CNB. However, you must verify your firmware compatibility and RSLogix\/Studio 5000 project configuration before upgrading.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eIs this a factory-sealed unit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAbsolutely. We only supply\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e100% Brand New\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eoriginal Allen Bradley hardware. Each 1756-CN2RK arrives in its original factory packaging with a clear chain of custody.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":52475895447861,"sku":"1756-CN2RK","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/7630\/5461\/files\/1756-CN2R_789f2a3e-9b62-481d-b9f7-b84eda88bef8.jpg?v=1774406055","url":"https:\/\/www.5gplc.com\/products\/allen-bradley-controllogix-controlnet-bridge-module-1756-cn2rk","provider":"High Five PLC Solution Limited","version":"1.0","type":"link"}