Allen Bradley AB ControlLogix Control Net Communications Bridge 1756-CNB /D

Allen-Bradley ControlLogix ControlNet Communications Bridge 1756-CNB/D

The Allen-Bradley 1756-CNB/D is a ControlNet Bridge Module designed to facilitate seamless communication between ControlLogix systems and ControlNet networks. This module enables efficient data exchange and integration across various industrial automation components.

Key Features

• Communication Capabilities: Supports up to 64 bidirectional connections with other ControlNet devices, accommodating both scheduled and unscheduled data transfers.
• Network Integration: Operates at a communication rate of 5 megabits per second, with support for up to 99 nodes, ensuring robust network performance.
• Port Configuration: Equipped with one ControlNet BNC port and one ControlNet RJ45 port, providing versatile connectivity options.
• Diagnostic Display: Features a front-panel display that cyclically shows module name, connection status, node address, and other critical parameters for easy monitoring.

Technical Specifications

• Current Draw: 970 milliamps at 5.1 Volts DC; 1.7 milliamps at 24 Volts DC.
• Power Dissipation: 5.14 Watts.
• Operating Temperature: 0 to 60 °C.
• Storage Temperature: -40 to 85 °C.
• Relative Humidity: 5% to 95% non-condensing.
• Vibration Resistance: 2 G at 10 to 500 Hz.
• Shock Resistance: Operating: 30 G; Non-operating: 50 G.
• Weight: Approximately 0.26 kg.

Applications

The 1756-CNB/D module is ideal for applications requiring reliable communication between ControlLogix controllers and ControlNet networks. It is commonly used in distributed I/O systems, bridging across different network protocols, and interfacing with Human Machine Interface (HMI) and Supervisory Control and Data Acquisition (SCADA) systems.

Installation and Configuration

When installing the 1756-CNB/D module, ensure that the node address switches are set to a unique value between 01 and 99. For redundant control setups, identical pairs of modules should have the same node address. Proper configuration of path information is essential for accurate message routing.

By integrating the 1756-CNB/D into your ControlLogix system, you can achieve efficient and reliable communication across your industrial automation network.