1756-CN2/B

Overview of Allen-Bradley 1756-CN2-B ControlNet Communication Module

The Allen-Bradley 1756-CN2-B is a ControlNet communication interface module for ControlLogix systems. It enables ControlLogix controllers to communicate over a high-speed ControlNet network at 5 Mbps, supporting up to 99 nodes and 131 connections. This module ensures real-time, deterministic data transfer for industrial control and automation.

Key Features of Allen-Bradley 1756-CN2-B

• Network Speed: 5 Mbps across ControlNet network using CIP (Common Industrial Protocol).
• Nodes and Connections: Supports up to 99 network nodes and 131 connections.
• Communication Ports: ControlNet BNC, ControlNet RJ-45, and USB 1.1 ports for network and programming connections.
• Input Current: 1100 mA at 5.1 V DC, 3 mA at 24 V DC.
• Power Dissipation: 5.6 watts with thermal dissipation of 19.1 BTU/hr.
• Isolation: 30 V isolation voltage, tested at 500 V DC for 60 seconds between ControlNet and system.
• Compatibility: Fits in any ControlLogix chassis slot and supports ControlNet coaxial cable (RG6 quad shielded).
• Operating Temperature: 0 to 60°C (32 to 140°F), suitable for industrial environments.
• Certifications: UL, CE, and other industrial regulatory approvals.

Technical Specifications of 1756-CN2-B

Applications / Use Case

The 1756-CN2-B module is used in ControlLogix automation systems for reliable real-time communication over ControlNet networks. It is ideal for high-speed, deterministic industrial data exchange, enhancing distributed control and networked device interaction across manufacturing and process control applications.