Overview
The Allen-Bradley 1756-CN2 is a ControlNet communication module designed for ControlLogix systems. This Series B module enables industrial devices to establish communication links across ControlNet networks within a ControlLogix chassis. It occupies a single slot and operates reliably across standard operating environments, making it suitable for distributed control architectures requiring network bridge or gateway functionality.
Key Features
- Single-slot module installation in any ControlLogix chassis slot
- 128 logical connections for device networking
- 30V isolation voltage, tested at 500V for 60 seconds between ControlNet and System
- ControlNet BNC connector, ControlNet RJ45 port, and USB 1.1 interface
- Operating temperature range of 0–60°C with 5–95% relative humidity tolerance
- Operational vibration rating of 2.0G at 10–500Hz; shock tolerance up to 30G
Technical Specifications
- 5V supply current: 1100 mA at 5.1 VDC
- 24V supply current: 3 mA at 24 VDC
- 5 Mbps transfer rate
- 99 maximum nodes supported
- 5.6 watts power dissipation
- Temperature code: T4A (North America), IEC T4 (Europe)
- Weight: 0.29 lbs
- Open-style enclosure
Typical Applications
Multiple communication-interface modules can be installed into the ControlLogix backplane to configure a gateway for bridging or routing control and information data between different networks. Common applications include:
- ControlNet network bridging and routing in manufacturing automation
- Integration of legacy ControlNet devices into modern ControlLogix systems
- Multi-network industrial gateways and communication hubs
- Distributed control system architectures requiring device interoperability
Compatibility & Replacements
Compatible With
- ControlLogix chassis (1756 backplane)
- Studio 5000 Logix Designer programming environment
- ControlNet industrial communication protocol
- Allen-Bradley ControlLogix processor modules
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. Confirm specific model numbers and firmware versions required for your application.
Works With
- Studio 5000 Logix Designer
- RSLinx Classic and RSLinx Enterprise
- ControlNet protocol (CIPâ„¢ over ControlNet)
- Allen-Bradley industrial communication networks
