Allen Bradley 1756-CNBR ControlNet Redundant Bridge Module

FAQ

Q1. What is the main function of the 1756-CNBR module?
It provides redundant ControlNet communication between ControlLogix controllers and devices.

Q2. What does “redundant” mean in this module?
It supports dual ControlNet channels, ensuring continuous operation if one network fails.

Q3. Can this module be used in a standard ControlLogix chassis?
Yes, it installs directly into any compatible ControlLogix chassis.

Q4. What is the difference between 1756-CNB and 1756-CNBR?
The CNBR version supports redundant media, while CNB supports only a single network.

Q5. Does the module require special configuration software?
Yes, it is configured using RSLogix 5000 or Studio 5000.

Q6. What is the maximum communication speed?
It operates at a fixed speed of 5 Mbps on ControlNet.

Q7. Is the module hot-swappable?
Yes, it supports removal and insertion under power with proper precautions.

Q8. What industries commonly use this module?
It is widely used in manufacturing, oil & gas, and process automation systems.

1756-CNBR Allen Bradley

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