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Technical specifications for
1756-CN2R
Allen-Bradley 1756-CN2R ControlNet Communication Module
Overview
The 1756-CN2R is a ControlNet Bridge Module from the ControlLogix series by Rockwell Automation. It supports high-speed, redundant ControlNet communication for reliable and deterministic industrial automation.
Key Features
- Manufacturer: Rockwell Automation
- Brand: Allen-Bradley
- Series: ControlLogix
- Part Number: 1756-CN2R
- Module Type: Bridge Module
- Ports:
- Two (2) ControlNet ports for network communication
- One (1) USB port for data transfer
- Slot Width: Single-slot module compatible with ControlLogix chassis
- Configuration: Supports redundant ControlNet configurations
Electrical Specifications
- Backplane Current:
- 1.3 A at 5.1 VDC
- 3 mA at 24 VDC
- Power Dissipation: 6.7 W
- Thermal Dissipation: 22.9 BTU/hr
- Isolation Voltage: 30 V continuous, ensuring electrical safety
- ControlNet Communication Rate: 5 Mbps
- USB Data Transfer Rate: 12 Mbps
Communication Capabilities
- Maximum Number of Connections: 131
- ControlNet Nodes Supported: 99
- Logix Communication Connections: 128
Mechanical Specifications
- Dimensions (HxWxD): 5.51 x 4.41 x 5.71 inches
- Weight: 0.64 lbs (0.293 kg)
- Enclosure Type: Open type, suitable for industrial control environments
Environmental Specifications
- Operating Temperature: 32°F to 140°F (0°C to 60°C)
Communication Cable
- Cable Type: 1786-RG6 quad shield RG6 coaxial cable
Applications
The 1756-CN2R ControlNet communication module is ideal for:
- Deterministic, high-speed industrial communication
- Redundant ControlNet configurations to ensure network reliability
- Complex control systems with multiple nodes and connections
