Allen-Bradley 1756-CN2RXT ControlNet Communication Bridge Module

n Amikon Limited

The various brands we offer in our distribution can meet the needs of most industries in China and provide high quality and reliable industrial components.

l Petrochemical automation

l Factory Automation

l Renewable Energy

l communication

l Electricity Distribution

Sales manager: Miya zheng Email: sales@amikon.cn WhatsApp: 86-18020776792

n Specifications

n Descripution

The 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 uploads and downloads. It is part of the ControlNet Communication Module series and is ideal for applications that require the use of 128 ControlNet connections per communication module. A ControlLogix-XT model it can provide control in operating environments where temperatures range between -25 and 70 °C (-13 and 158 °F). The 1756-CN2RXT ControlNet Interface supports a total of 99 nodes and 131 connections –128 standard Logix connections plus 3 reserved for redundant control. Because these are reserved, the 3 connections will always appear in use even when they are open.  The module comes with a communication rate of 5 Mbps, current draws of 1300 mA at 5.1V DC, and of 3 mA at 24V DC. Its isolation voltage is 30V (continuous) with a basic insulation type. The 1756-CN2RXT Module features one USB 1.1 full speed (12 Mbps) port and two ControlNet BNC ports requiring the 1786-RG6 quad-shield RG6 coaxial cable. It can occupy any chassis-based slot and is compatible with the 1756-A4LXT, 1756-A5XT, 1756-A7XT, and the 1756-A7LXT ControlLogix Chassis.

n FAQ

1. How does the AB 1756-CN2RXT enhance redundant ControlNet communication performance in mission-critical ControlLogix applications?
The AB 1756-CN2RXT provides high-availability ControlNet connectivity with redundant media support, ensuring continuous communication and minimizing the risk of network-related downtime.

2. Why is the AB 1756-CN2RXT considered a preferred solution for fault-tolerant industrial control architectures?
The AB 1756-CN2RXT incorporates redundant ControlNet channels that allow seamless network switchover during communication failures, helping maintain operational continuity in critical automation systems.

3. What advanced network resilience features distinguish the AB 1756-CN2RXT from standard communication interface modules?
The AB 1756-CN2RXT supports redundant coaxial media, deterministic data transfer, and high-speed ControlNet communication, providing exceptional reliability for distributed control environments.

4. To what extent can the AB 1756-CN2RXT optimize controller, I/O, and peer-to-peer communications across a ControlNet infrastructure?
The AB 1756-CN2RXT efficiently manages scheduled and unscheduled ControlNet traffic, enabling real-time I/O exchange, inter-controller messaging, and coordinated system-wide data communication.

5. Which engineering considerations should be evaluated when integrating the AB 1756-CN2RXT into a redundant ControlLogix network topology?
When deploying the AB 1756-CN2RXT, engineers should assess ControlNet media redundancy requirements, node configuration, network update times, and chassis compatibility to maximize communication integrity and system availability.

n More Recommended