{"product_id":"allen-bradley-1756-cnb-controllogix-series-communication-module","title":"Allen-Bradley 1756-CNB ControlLogix Series Communication Module","description":"\u003cp\u003eConfigured for ControlNet network bridging and data exchange in ControlLogix automation systems, the \u003cstrong\u003eAllen-Bradley 1756-CNB\u003c\/strong\u003e (\u003cstrong\u003e1756-CNB\u003c\/strong\u003e ControlLogix Communication Module) provides direct network interface execution between ControlLogix chassis components and ControlNet devices.\u003c\/p\u003e\n\u003ch3\u003eModel Configuration Details\u003c\/h3\u003e\n\u003cp\u003eThe 1756-CNB is a ControlLogix bridge module designed for ControlNet communication. The module provides one ControlNet port and manages scheduled and unscheduled communication between Logix controllers, I\/O devices, and network nodes.\u003c\/p\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eModel Element\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\u003eBase Model\u003c\/td\u003e\n\u003ctd\u003e1756-CNB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Family\u003c\/td\u003e\n\u003ctd\u003eControlLogix Communication Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNetwork Type\u003c\/td\u003e\n\u003ctd\u003eControlNet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePort Configuration\u003c\/td\u003e\n\u003ctd\u003e1 ControlNet port\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply Interface\u003c\/td\u003e\n\u003ctd\u003eControlLogix backplane power\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Function\u003c\/td\u003e\n\u003ctd\u003eControlNet bridge communication\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\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-CNB\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\u003eControlLogix 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\u003e0.35 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping Dimensions\u003c\/td\u003e\n\u003ctd\u003e22 x 17.5 x 5 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e5.1 Watts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eBridge Module\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\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\u003e64\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Rate\u003c\/td\u003e\n\u003ctd\u003e5 megabits\/second\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Current\u003c\/td\u003e\n\u003ctd\u003e970 mA at 5.1 VDC, 1.7 mA at 24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThermal Dissipation\u003c\/td\u003e\n\u003ctd\u003e17.4 BTU\/hour\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eControlNet Network Interface Characteristics\u003c\/h3\u003e\n\u003cp\u003eThe 1756-CNB manages ControlNet communication traffic through the ControlLogix backplane interface. It transfers controller data, I\/O information, and messaging packets between the ControlLogix processor and connected ControlNet nodes.\u003c\/p\u003e\n\u003cp\u003eThe ControlNet network operates with deterministic scheduling characteristics at a communication rate of 5 megabits\/second. The module supports up to 99 network nodes and 64 communication connections according to the configured system architecture.\u003c\/p\u003e\n\u003cp\u003eFor ControlLogix applications, backplane communication performance depends on chassis configuration, processor loading, and installed communication modules. Proper firmware compatibility between the controller, bridge module, and network devices must be verified before system commissioning.\u003c\/p\u003e\n\u003ch3\u003eOrdering Information\u003c\/h3\u003e\n\u003cp\u003eThe delivered package normally includes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Allen-Bradley 1756-CNB ControlLogix ControlNet Bridge Module\u003c\/li\u003e\n\u003cli\u003e1 x ControlLogix chassis mounting interface\u003c\/li\u003e\n\u003cli\u003e1 x Network connector interface\u003c\/li\u003e\n\u003cli\u003e1 x Standard product documentation when supplied\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003ch4\u003eChassis Installation\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eInstall the module into an available ControlLogix chassis slot.\u003c\/li\u003e\n\u003cli\u003eConfirm chassis power is removed before module insertion or removal.\u003c\/li\u003e\n\u003cli\u003eVerify keying position and slot alignment before installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eControlNet Wiring\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eConnect the ControlNet cable using the correct network connector.\u003c\/li\u003e\n\u003cli\u003eMaintain separation between ControlNet communication cables and high-voltage power wiring.\u003c\/li\u003e\n\u003cli\u003eFollow ControlNet network termination requirements for the installed topology.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eGrounding and Maintenance\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eConfirm chassis grounding before applying system power.\u003c\/li\u003e\n\u003cli\u003eInspect connectors for contamination or mechanical damage during maintenance.\u003c\/li\u003e\n\u003cli\u003eVerify node addressing and communication status after replacement.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eWhat communication protocol does the 1756-CNB support?\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe 1756-CNB is a ControlNet bridge module designed for communication between ControlLogix systems and ControlNet network devices.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCan the 1756-CNB be installed while the chassis is powered?\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eModule installation should be performed with chassis power removed unless the system configuration specifically supports removal procedures.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHow many ControlNet nodes can this module support?\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe module supports up to 99 ControlNet nodes within the configured network architecture.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWhat is the ControlNet communication speed?\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe module operates on ControlNet communication at a rate of 5 megabits\/second.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHow many communication connections are supported?\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe 1756-CNB supports up to 64 communication connections depending on system configuration.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWhat power does the module consume from the chassis?\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe module requires 970 mA at 5.1 VDC and 1.7 mA at 24 VDC according to the supplied specifications.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDoes firmware compatibility affect module operation?\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eYes. The module firmware must be compatible with the ControlLogix controller and connected ControlNet devices.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHow should ControlNet cables be installed?\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eControlNet cables should be routed separately from high-current wiring and installed according to network grounding and termination requirements.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":46066412257453,"sku":"1756-CNB","price":88.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/1613\/9181\/files\/1756-CNB_1.jpg?v=1785405734","url":"https:\/\/www.maxwellplc.com\/ru\/products\/allen-bradley-1756-cnb-controllogix-series-communication-module","provider":"Maxwell PLC Ltd","version":"1.0","type":"link"}