Excellent PLC
Product Introduction
The Allen-Bradley 1756-CN2/A is a ControlLogix ControlNet communication module designed to provide high-speed and deterministic data exchange within industrial control systems. Developed by Rockwell Automation, this module functions as a dual-capacity bridge, supporting up to 100 connections for efficient network communication.
As part of the ControlLogix platform, the 1756-CN2/A enables seamless integration between controllers, I/O modules, and other networked devices over the ControlNet network. It is widely used in applications requiring real-time data transfer, synchronization, and reliable communication across distributed systems.
The module also supports advanced communication capabilities such as CIP-based data exchange and can be integrated into safety architectures when used alongside GuardLogix or Compact GuardLogix controllers. This ensures compliance with functional safety standards up to SIL3 and PLe, making it suitable for safety-critical industrial environments.
Product Specifications
| Parameter | Description |
|---|---|
| Model | 1756-CN2/A |
| Series | ControlLogix |
| Module Type | ControlNet Communication Module |
| Communication Network | ControlNet |
| Function | Dual Capacity Bridge |
| Maximum Connections | 100 |
| Communication Rate | 5 Mbps (ControlNet standard) |
| Protocol Support | CIP (Common Industrial Protocol) |
| Safety Integration | Supports CIP Safety (with GuardLogix systems) |
| Ports | ControlNet coaxial ports |
| Node Addressing | Configurable via software or hardware |
| Backplane Current | Approx. 1 A @ 5V DC |
| Operating Temperature | 0 to 60°C |
| Storage Temperature | -40 to 85°C |
| Dimensions | 144.5 × 34.6 × 130.18 mm |
| Weight | 0.26 kg |
Applications
• Distributed control systems – Enables communication between multiple PLCs and remote I/O over ControlNet
• Process automation – Ensures deterministic data exchange in industries such as oil & gas, chemical, and power
• Safety-integrated systems – Works with GuardLogix controllers for safety communication up to SIL3/PLe
• High-speed data networks – Suitable for time-critical applications requiring synchronized communication
• Large-scale automation systems – Supports multiple network connections for complex system architectures
Advantages
• Dual-capacity communication – Supports up to 100 connections for high network efficiency
• Deterministic network performance – Ensures predictable and time-critical data transmission
• CIP protocol support – Enables standardized communication across industrial devices
• Safety integration capability – Compatible with CIP Safety for advanced safety applications
• Seamless ControlLogix integration – Fully compatible with existing ControlLogix systems
• Robust industrial design – Reliable performance in demanding environments
