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Description
The Allen-Bradley 1756-CN2R is a high-performance ControlLogix communication bridge module designed for seamless integration within ControlNet networks. This dual-channel interface module supports redundant media configurations, ensuring high availability and robust data exchange for industrial automation systems. It serves as a critical link in the ControlLogix architecture, facilitating efficient communication between controllers and distributed I/O devices.
Features
- Dual-channel interface for reliable network connectivity.
- Supports redundant media to minimize downtime in critical applications.
- ControlNet communication rate of 5 Mbps.
- Capacity for up to 128 Logix connections.
- Scalable architecture supporting up to 99 nodes on the network.
- Directly mounts into the ControlLogix chassis for high-speed backplane communication.
Technical Specifications
| Model Number | 1756-CN2R |
| Module Type | ControlNet Bridge Module |
| Communication Rate | 5 Mbps |
| Logix Connections | 128 |
| Node Capacity | 99 |
| Backplane Current | 5.1 Volts DC |
| Manufacturer | Allen-Bradley |
Installation Guidelines
- Ensure the ControlLogix chassis is powered down before inserting or removing the 1756-CN2R module to prevent electrical damage.
- Verify that the module is fully seated in the chassis slot and the locking tabs are secured.
- Use appropriate shielded ControlNet cabling to maintain signal integrity and minimize interference from high-EMI sources.
- Follow standard ESD (Electrostatic Discharge) mitigation protocols when handling the module to protect internal circuitry.
- Ensure proper grounding of the chassis and network shield to maintain system stability.
FAQ
What is the primary function of the 1756-CN2R?
The 1756-CN2R is a bridge module that enables a ControlLogix controller to communicate over a ControlNet network, supporting both standard and redundant media setups.
Does this module support redundant media?
Yes, the 1756-CN2R is specifically designed to support redundant media, providing a backup physical path for network data to ensure continuous operation.
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