Manufacturer Rockwell Automation
Brand Allen Bradley
Part Number/Catalog number 1756-CN2RXT
Series ControlLogix
Module Type Indicates the interface module
Allen-Bradley 1756-CN2RXT is a redundant media ControlNet communication bridge module where controller-to-controller interlocking and I/O updates always take precedence over messaging and program uploading and downloading. It is part of the ControlNet family of communication modules and is ideal for applications that require 128 ControlNet connections per communication module. As the ControlLogix-XT model, it can provide control in operating environments with temperatures ranging from -25 to 70 °C (-13 to 158 °F).
The 1756-CN2RXT ControlNet interface supports a total of 99 nodes and 131 connections - 128 standard Logix connections plus 3 connections reserved for redundant control. Since these are reserved, they will always appear in use even if the 3 connections are open. The module has a communication rate of 5 Mbps and a current consumption of 1300 mA at 5.1V DC and 3 mA at 24V DC. The isolation voltage is 30V (continuous) and the basic insulation type is used.
The 1756-CN2RXT module has one USB 1.1 full speed (12 Mbps) port and two ControlNet BNC ports that require 1786-RG6 four-shielded RG6 coaxial cable. It can occupy any chassis based slot and is compatible with the 1756-A4LXT, 1756-A5XT, 1756-A7XT, and 1756-A7LXT ControlLogix chassis.
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