{"product_id":"allen-bradley-controllogix-1756-cnb-controllogix-communication-module","title":"Allen-Bradley 1756-CNB ControlLogix ControlNet Communication Bridge Module","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\u003cp\u003eThe Allen-Bradley 1756-CNB is a ControlLogix ControlNet Communication Bridge module designed to facilitate high-speed data exchange between a ControlLogix controller and a ControlNet network. As a critical component in the ControlLogix architecture, this module manages the transfer of I\/O data and messaging across the network, supporting up to 99 nodes and 64 connections. It provides a reliable interface for distributed control systems requiring deterministic communication performance.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSupports ControlNet communication at a rate of 5 Mbps.\u003c\/li\u003e\n\u003cli\u003eProvides a single ControlNet port for network connectivity.\u003c\/li\u003e\n\u003cli\u003eDesigned for seamless integration into the ControlLogix chassis.\u003c\/li\u003e\n\u003cli\u003eSupports up to 99 nodes and 64 connections for scalable network configurations.\u003c\/li\u003e\n\u003cli\u003eEfficient power management with low thermal dissipation.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ctable border=\"1\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Model\u003c\/td\u003e\n\u003ctd\u003e1756-CNB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eControlNet Bridge Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Rate\u003c\/td\u003e\n\u003ctd\u003e5 Mbps\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\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\u003ePower Dissipation\u003c\/td\u003e\n\u003ctd\u003e5.1 Watts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThermal Dissipation\u003c\/td\u003e\n\u003ctd\u003e17.4 BTU\/hr\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eEnsure the ControlLogix chassis is powered down before inserting or removing the module.\u003c\/li\u003e\n\u003cli\u003eSlide the module into the designated slot in the chassis and ensure it is fully seated before tightening the mounting screws.\u003c\/li\u003e\n\u003cli\u003eUse appropriate ControlNet cabling and ensure proper termination at both ends of the network segment to maintain signal integrity.\u003c\/li\u003e\n\u003cli\u003eMaintain adequate clearance around the chassis to ensure proper airflow and cooling.\u003c\/li\u003e\n\u003cli\u003eAvoid routing communication cables near high-voltage lines or sources of electromagnetic interference (EMI).\u003c\/li\u003e\n\u003cli\u003eFollow standard ESD (Electrostatic Discharge) precautions when handling the module.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003ch3\u003eWhat is the primary function of the 1756-CNB?\u003c\/h3\u003e\u003cp\u003eThe 1756-CNB acts as a bridge between the ControlLogix backplane and the ControlNet network, allowing the controller to communicate with remote I\/O and other controllers on the network.\u003c\/p\u003e\u003ch3\u003eDoes this module require external power?\u003c\/h3\u003e\u003cp\u003eNo, the 1756-CNB draws its required power directly from the ControlLogix chassis backplane.\u003c\/p\u003e\u003ch3\u003eWhat is the maximum data rate for this module?\u003c\/h3\u003e\u003cp\u003eThe 1756-CNB supports a fixed ControlNet communication rate of 5 Mbps.\u003c\/p\u003e","brand":"Allen-Bradley","offers":[{"title":"Default Title","offer_id":50920597750012,"sku":"1756-CNB","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/9983\/1292\/files\/wm_1_d2c97647-9780-4525-af06-b5647ca1583d.jpg?v=1785918940","url":"https:\/\/www.electronicplc.com\/ar\/products\/allen-bradley-controllogix-1756-cnb-controllogix-communication-module","provider":"Electronic PLC","version":"1.0","type":"link"}