{"product_id":"allen-bradley-1756-cn2-controllogix-controlnet-communication-module","title":"Allen-Bradley 1756-CN2 ControlLogix ControlNet Communication Module","description":"\u003cp\u003eThe Allen-Bradley \u003cstrong\u003e1756-CN2\u003c\/strong\u003e is a high-performance ControlNet communication module designed for the ControlLogix platform. It enables deterministic, high-speed data transfer and peer-to-peer communication across industrial automation networks. This module supports up to 128 Logix connections and manages up to 99 nodes on a single ControlNet network, providing reliable connectivity for complex distributed control architectures.\u003c\/p\u003e\n\u003ch3\u003eNetwork Communication and Performance\u003c\/h3\u003e\n\u003cp\u003eOperating at a transmission rate of 5 Mbps, the module facilitates real-time data exchange and controller-to-controller messaging. It draws 1100 mA from the 5.1 VDC backplane and 3 mA from the 24 VDC auxiliary power supply, resulting in a total power dissipation of 5.6 W.\u003c\/p\u003e\n\u003ch3\u003eInstallation and Environmental Requirements\u003c\/h3\u003e\n\u003cp\u003eThe unit is housed in an open-style chassis format and weighs approximately 0.29 lbs. It is designed to operate reliably within a surrounding air temperature range of 0 deg C to 60 deg C. Proper ControlNet coaxial cabling and correct termination practices are required to maintain signal integrity across the network trunk.\u003c\/p\u003e\n\u003ch3\u003eTechnical Parameters\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\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-CN2\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\u003eCommunication Protocol\u003c\/td\u003e\n\u003ctd\u003eControlNet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission Rate\u003c\/td\u003e\n\u003ctd\u003e5 Mbps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLogix Connections\u003c\/td\u003e\n\u003ctd\u003e128 max\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\u003eBackplane Current (5.1 VDC)\u003c\/td\u003e\n\u003ctd\u003e1100 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAuxiliary Current (24 VDC)\u003c\/td\u003e\n\u003ctd\u003e3 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Dissipation\u003c\/td\u003e\n\u003ctd\u003e5.6 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e0 deg C to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.29 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cp\u003eMount the module into any available slot within a standard 1756 ControlLogix chassis. Use certified ControlNet coaxial cables and ensure both ends of the segment are fitted with proper terminating resistors to prevent signal reflections.\u003c\/p\u003e\n\u003cp\u003eFrequently Asked Questions\u003c\/p\u003e\n\u003cp\u003eQ: What is the primary function of the 1756-CN2 module? A: It acts as a ControlNet interface bridge for ControlLogix controllers, enabling high-speed deterministic data exchange and peer-to-peer communication across distributed automation nodes.\u003c\/p\u003e\n\u003cp\u003eQ: Can the 1756-CN2 support redundant ControlNet media? A: No, the 1756-CN2 is a single-media communication module. For media redundancy applications requiring redundant coaxial channels, the 1756-CN2R model should be used instead.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":53256000635160,"sku":"1756-CN2","price":270.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0892\/3483\/3688\/files\/1756-CN2R_Cocoai.jpg?v=1794448992","url":"https:\/\/www.innoplcsync.com\/products\/allen-bradley-1756-cn2-controllogix-controlnet-communication-module","provider":"InnoPLC Sync Co., Ltd.","version":"1.0","type":"link"}