{"product_id":"allen-bradley-1756-cn2-controllogix-series-communication-module","title":"Allen-Bradley 1756-CN2 ControlLogix Series Communication Module","description":"\u003cp\u003eConfigured for ControlNet network data communication in ControlLogix systems, the \u003cstrong\u003eAllen-Bradley 1756-CN2\u003c\/strong\u003e (\u003cstrong\u003e1756-CN2\u003c\/strong\u003e Communication Module) provides direct network interface execution between Logix controllers, I\/O devices, and connected ControlNet nodes.\u003c\/p\u003e\n\u003ch3\u003eModel Identification\u003c\/h3\u003e\n\u003cp\u003eThe 1756-CN2 is a ControlLogix communication module designed for ControlNet standard media networks. It provides scheduled and unscheduled communication services between ControlLogix processors and connected network devices.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCatalog Number: 1756-CN2\u003c\/li\u003e\n\u003cli\u003eSeries: ControlLogix\u003c\/li\u003e\n\u003cli\u003eNetwork Type: ControlNet\u003c\/li\u003e\n\u003cli\u003eMedia Type: Standard Media\u003c\/li\u003e\n\u003cli\u003eCommunication Rate: 5 Mbps\u003c\/li\u003e\n\u003cli\u003eLogix Connections: 128\u003c\/li\u003e\n\u003cli\u003eMaximum Nodes: 99\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\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-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\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eControlNet Communication Modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eControlLogix\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\u003e0.25 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e14 x 13 x 3.4 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003eNot specified in provided data\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eNot specified in provided data\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Network\u003c\/td\u003e\n\u003ctd\u003eControlNet\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\u003eMaximum Logix Connections\u003c\/td\u003e\n\u003ctd\u003e128\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Network Nodes\u003c\/td\u003e\n\u003ctd\u003e99\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Media\u003c\/td\u003e\n\u003ctd\u003eStandard Media\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eControlLogix Network Communication Characteristics\u003c\/h3\u003e\n\u003cp\u003eThe 1756-CN2 integrates ControlLogix chassis with ControlNet deterministic communication networks. The module exchanges controller, I\/O, and messaging data through the ControlNet protocol structure.\u003c\/p\u003e\n\u003cp\u003eThe ControlLogix backplane interface manages communication between the 1756-CN2 module and the processor chassis. Network configuration requires compatible ControlNet scheduling, node addressing, and firmware compatibility between connected devices.\u003c\/p\u003e\n\u003ch3\u003eOrdering Information\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Allen-Bradley 1756-CN2 ControlLogix ControlNet Communication Module\u003c\/li\u003e\n\u003cli\u003e1 x Protective industrial packaging\u003c\/li\u003e\n\u003cli\u003eDocumentation availability depends on supply configuration\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInstall the module in a compatible ControlLogix chassis slot.\u003c\/li\u003e\n\u003cli\u003eRemove chassis power before module installation or removal unless the system configuration specifically supports removal under power.\u003c\/li\u003e\n\u003cli\u003eVerify ControlNet node addressing before network startup.\u003c\/li\u003e\n\u003cli\u003eUse approved ControlNet cabling and connectors for network connections.\u003c\/li\u003e\n\u003cli\u003eMaintain separation between communication cables and high voltage wiring.\u003c\/li\u003e\n\u003cli\u003eConfirm controller firmware compatibility before commissioning.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eWhat communication protocol does the 1756-CN2 support?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe 1756-CN2 supports ControlNet communication and provides network connectivity between ControlLogix controllers and ControlNet devices.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eWhat is the communication speed of the 1756-CN2?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe module operates at a ControlNet communication rate of 5 Mbps according to the provided technical specification.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eHow many Logix connections are supported by this module?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe 1756-CN2 supports up to 128 Logix connections for communication between configured ControlLogix network devices.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eHow many ControlNet nodes can be connected?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe module supports a maximum of 99 ControlNet nodes within the configured network architecture.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eDoes the 1756-CN2 use Ethernet communication?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNo. The 1756-CN2 is a ControlNet communication module and does not provide EtherNet\/IP network functionality.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eWhere is the 1756-CN2 installed in a ControlLogix system?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe module is installed in a ControlLogix chassis and communicates with the processor through the chassis backplane.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eDoes the module require firmware compatibility checks?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eYes. The communication module firmware should be compatible with the ControlLogix processor and ControlNet configuration software.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eCan the module be removed while powered?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eInstallation or removal should follow ControlLogix chassis procedures. Power removal is recommended unless the configured system specifically permits live module handling.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":46066412191917,"sku":"1756-CN2","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/1756-CN2-0.jpg?v=1785930425","url":"https:\/\/www.maxwellplc.com\/ga\/products\/allen-bradley-1756-cn2-controllogix-series-communication-module","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}