{"product_id":"allen-bradley-1756-cn2rk-controllogix-controlnet-bridge-module","title":"Allen-Bradley 1756-CN2RK ControlLogix ControlNet Bridge Module","description":"\u003ch1 class=\"PDq2pG_selectionAnchorContainer\"\u003eAllen-Bradley 1756-CN2RK ControlLogix ControlNet Bridge Module\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h1\u003e\n\u003cp\u003eConfigured for deterministic ControlNet data bridging in ControlLogix redundant communication architectures, the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAllen-Bradley 1756-CN2RK\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(\u003cstrong\u003e1756-CN2RK\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eBridge Module) provides direct physical and protocol-level execution of dual-channel ControlNet communication at 5 Mbps across redundant network paths within a ControlLogix backplane system. The module supports up to 99 network nodes and manages up to 131 simultaneous connections through scheduled network execution.\u003c\/p\u003e\n\u003cp\u003eAligned with\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003eRockwell Automation\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eControlLogix communication framework, the module performs backplane-synchronized ControlNet bridging with dual-channel redundancy and conformal-coated PCB protection for environmental stability in electrically noisy installations.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cp\u003eSingle defined configuration:\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1756-CN2RK\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eControlNet redundant bridge module. No additional functional suffix segmentation specified.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003cth class=\"last:pe-10\"\u003eParameter\u003c\/th\u003e\n\u003cth class=\"last:pe-10\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e1756-CN2RK\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\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.88 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e6.7 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNetwork Type\u003c\/td\u003e\n\u003ctd\u003eControlNet 5 Mbps redundant dual channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Nodes\u003c\/td\u003e\n\u003ctd\u003e99\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Connections\u003c\/td\u003e\n\u003ctd\u003e131\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Current\u003c\/td\u003e\n\u003ctd\u003e1300 mA @ 5.1 VDC, 3 mA @ 24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThermal Dissipation\u003c\/td\u003e\n\u003ctd\u003e22.9 BTU\/hour\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSlot Width\u003c\/td\u003e\n\u003ctd\u003e1 communication module slot\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoating\u003c\/td\u003e\n\u003ctd\u003eConformal coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch3\u003eControlNet Dual-Channel Bridge Execution Architecture\u003c\/h3\u003e\n\u003cp\u003eThe 1756-CN2RK executes ControlNet frame forwarding through deterministic scheduling at 5 Mbps network rate, synchronizing redundant channel propagation across dual communication paths. Backplane bus communication velocity is managed through ControlLogix system timing, ensuring consistent frame alignment between controller task execution and network transmission cycles.\u003c\/p\u003e\n\u003cp\u003eThe module supports I\/O and controller node aggregation up to 99 devices, with connection handling capacity of 131 logical links distributed across scheduled network intervals. Redundant channel operation maintains parallel data stream integrity at the media interface layer without interrupt arbitration at application level.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does the 1756-CN2RK support hot-swap in ControlLogix chassis?\u003c\/strong\u003e\u003cbr\u003eA: Yes. The module supports hot insertion and removal. Reinitialization is handled through ControlLogix backplane rescan and configuration reload.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the limitation of ControlNet node count?\u003c\/strong\u003e\u003cbr\u003eA: The module supports a maximum of 99 nodes, constrained by ControlNet scheduling bandwidth at 5 Mbps.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How is redundancy implemented between channels?\u003c\/strong\u003e\u003cbr\u003eA: Dual-channel redundancy operates at the network interface layer with synchronized frame transmission across both ControlNet paths.\u003c\/p\u003e\n\u003chr\u003e\u003chr\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the module into a compatible ControlLogix chassis ensuring full backplane connector engagement to maintain deterministic timing alignment. ControlNet coaxial cabling must follow impedance-controlled routing with continuous shield integrity across trunk and drop segments.\u003c\/p\u003e\n\u003cp\u003eMaintain separation between ControlNet communication lines and high-current power conductors to reduce induced electromagnetic coupling. Shield grounding must be implemented using a single-point earth reference to avoid loop currents across redundant channels.\u003c\/p\u003e\n\u003cp\u003eVerify firmware compatibility between controller, chassis, and communication module prior to commissioning to ensure correct backplane scheduling synchronization and network timing alignment.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":43576273862746,"sku":"1756-CN2RK","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/1756-CN2RK2.jpg?v=1782876376","url":"https:\/\/www.plcmasters.com\/products\/allen-bradley-1756-cn2rk-controllogix-controlnet-bridge-module","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}