Allen-Bradley 1756-CNBR/D ControlLogix ControlNet Redundant Bridge Module

The Allen-Bradley 1756-CNBR/D ControlLogix ControlNet Redundant Bridge Module is a high-performance, reliable solution designed to ensure continuous, fault-tolerant communication in industrial control systems. As part of the ControlLogix system, this module facilitates redundant network communication, providing high availability and robustness to automation applications. Its integration within the ControlLogix architecture offers seamless communication between ControlNet devices, ensuring a reliable connection even in the event of network failures or component malfunctions.

Functional Highlights

• Redundant Network Configuration: The 1756-CNBR/D module supports dual communication paths, ensuring constant network availability and minimal downtime, which is critical in high-demand industrial environments.

• Seamless Integration: Designed for use within the ControlLogix platform, it integrates easily with other Allen-Bradley components, enhancing overall system flexibility and performance.

• High-Speed Communication: Delivers fast and reliable data transmission over ControlNet networks, enabling smooth data exchange between controllers, I/O devices, and other networked systems.

• Easy Diagnostics: Includes built-in diagnostic tools that provide real-time visibility into network health, allowing operators to troubleshoot quickly and reduce system downtime.

• Scalable Architecture: As part of the ControlLogix system, this module supports flexible expansion of your network, accommodating increasing device or system requirements without significant system redesign.

Technical Specifications

• Model: 1756-CNBR/D

• Module Type: ControlNet Redundant Bridge Module

• Input Voltage: 24V DC

• Power Consumption: 1.5W (typical)

• Network Protocol: ControlNet

• Communication Ports:

• 2 x ControlNet Ports (Redundant)

• Bus Current: 250mA @ 5V DC

• Status Indicators:

• LED indicators for network status, device status, and power status

• Temperature Range: Operating: 0°C to 60°C, Storage: -25°C to 85°C

• Mounting Type: Modular, fits into the ControlLogix chassis

• Dimensions: 4.20 x 6.90 x 3.15 inches (106.7 x 175.3 x 80 mm)

• Weight: 0.88 lbs (0.4 kg)

• Compatibility: Works with ControlLogix 1756 series systems, supporting a range of ControlNet devices.

Typical Applications

The Allen-Bradley 1756-CNBR/D ControlLogix ControlNet Redundant Bridge Module is ideal for use in industrial automation systems where reliability and high-speed communication are critical. Key applications include:

• Manufacturing Plants: Ensuring reliable communication between programmable logic controllers (PLCs), I/O devices, and process control systems on the factory floor.

• Oil & Gas: Facilitating continuous communication between controllers and field devices in harsh, remote environments, where network uptime is crucial.

• Energy Management: Supporting real-time monitoring and control of energy systems such as power generation plants, grid systems, and substations.

• Water Treatment Facilities: Connecting various control devices across geographically dispersed areas, ensuring reliable data transfer for water quality management and treatment processes.

• Automotive: Enabling communication between robotic arms, conveyor systems, and automated manufacturing machines.

Support & Maintenance

The 1756-CNBR/D module is backed by Allen-Bradley’s extensive support and service network, which includes:

• 24/7 Technical Support: Access to industry-leading support to ensure smooth operation and quick resolution of issues.

• Software & Firmware Updates: Regular updates to keep the module compatible with the latest ControlNet and ControlLogix technologies.

• Long-Term Reliability: Designed for continuous operation in demanding industrial environments, with a robust construction that reduces the likelihood of failure.

FAQ

1. What is the primary function of the 1756-CNBR/D ControlNet Redundant Bridge Module?

• The 1756-CNBR/D ensures fault-tolerant communication in a ControlLogix system by providing dual, redundant network paths, minimizing downtime and improving system reliability.

2. Is the 1756-CNBR/D module compatible with all ControlLogix systems?

• Yes, this module is designed to integrate seamlessly with all ControlLogix 1756-series systems, providing flexibility for various industrial applications.

3. How does the redundancy feature work in the 1756-CNBR/D?

• The module supports dual redundant paths, ensuring that if one network connection fails, the second path continues to maintain communication without interruption, enhancing network uptime.

4. What types of diagnostics are available on the 1756-CNBR/D?

• The module provides real-time LED indicators and diagnostic tools for network status, device health, and power status, allowing operators to quickly identify and address potential issues.

5. Can I use the 1756-CNBR/D module in extreme temperature environments?

• The module operates within a temperature range of 0°C to 60°C (operating) and can be stored in environments ranging from -25°C to 85°C, making it suitable for most industrial settings.