Overview
The 1756-CNBR is a ControlNet communication bridge module from the Rockwell Automation (Allen-Bradley) ControlLogix series, designed specifically for industrial automation systems. It bridges the ControlLogix backplane and the ControlNet network, enabling efficient transmission of predefined data and real-time monitoring of remote I/O modules.

9. This module supports redundant communication media, maintaining network connectivity in the event of a splitter or trunk line failure, significantly improving system reliability.

9. Furthermore, it can handle up to 64 bidirectional device connections and buffer up to 20 unconnected messages, making it suitable for demanding communication stability applications such as manufacturing and energy.

Core Functions and Technical Features
Parameters Description
Communication Function: Bridges ControlLogix processors and ControlNet networks to transmit scheduled data. Redundancy Support: Dual communication media design prevents single points of failure from causing network interruptions.

Connectivity
Integrated Compatibility: Works with Logix5550 controllers and is compatible with ControlLogix series I/O modules.
Network Access: Enables local network diagnostics and configuration via the Network Access Port (NAP).
Application Benefits: High Reliability: Redundant communication design ensures continuous operation in harsh environments such as industrial vibration and temperature fluctuations, reducing the risk of production line downtime.
Flexible Scalability: Supports remote I/O module monitoring, enabling distributed control system deployment and reducing wiring costs.

Efficient Data Processing: The producer/consumer model optimizes real-time data transmission and improves the responsiveness of large-scale automation systems.

Physical and Electrical Specifications
Property Value
Input Voltage 24V DC (typical industrial power supply)
Operating Temperature 0°C – 60°C
Enclosure Rating Industrial-grade packaging, EMI-resistant
Mounting Method ControlLogix rack plug-and-play