Allen-Bradley 1756-CN2R/B ControlNet Redundant Interface Module

Core Functions and Technical Specifications

Functional Positioning

Technical Parameters (English)

Key Features

1. Redundant Media Support
• Dual BNC ports enable active-passive redundancy for ControlNet networks, ensuring continuous operation if one path fails 14.
• Automatically switches to the redundant path within milliseconds during network disruptions.
2. High-Speed Data Transfer
• Supports 5 Mbps data rate for real-time control and diagnostics, suitable for applications like robotics and process automation 1.
• Block transfer capability for large data packets (e.g., analog signals, machine status).
3. Flexible Integration
• Compatible with ControlLogix, CompactLogix, and PLC-5/SLC systems via ControlNet.
• Integrates with HMI/SCADA systems (e.g., FactoryTalk View) for centralized monitoring 1.
4. Rugged Design
• Wide temperature range and industrial-grade components withstand harsh environments (e.g., chemical plants, steel mills) 3.
• IP67-rated connectors available for dust/water resistance in extreme conditions.
5. Hot-Swap Capability
• Modules can be replaced without powering down the chassis, reducing downtime during maintenance