Allen-Bradley 1756-DNB ControlLogix DeviceNet Comms Module

Description 

The Allen-Bradley 1756-DNB is a ControlLogix DeviceNet scanner module designed for connecting DeviceNet networks to a ControlLogix system. It supports DeviceNet communication rates of 125, 250, or 500 Kbps and provides reliable data exchange between controllers and DeviceNet devices.

Technical Specifications 

Information About 1756-DNB

The 1756-DNB is part of the Allen-Bradley ControlLogix family, engineered to function as a bridge between DeviceNet nodes and the controller. It supports up to 64 DeviceNet nodes with addresses from 00 to 63, enabling large-scale device connectivity. This module communicates at selectable baud rates of 125, 250, and 500 Kbps to adapt to different network demands. It consumes 580 mA at 5 VDC and 3 mA at 24 VDC from the backplane, with a maximum power dissipation of 5.8 W. The module provides continuous insulation voltage of 30 V, ensuring reliable protection, and it operates in a temperature range of 0–60 °C. The 1756-DNB is installed in any slot of a ControlLogix chassis and is supported only by Logix5550 controllers, making it a key component in integrating DeviceNet into Logix-based control systems.

Key Features:

• Communication Rates: Supports DeviceNet speeds of 125, 250, or 500 Kbps, ensuring adaptability for various network designs.

• Node Capacity: Handles up to 64 nodes with address range 00–63, allowing wide device integration.

• Module Role: Functions as a scanner to collect input data, send output commands, download configuration files, and monitor device status.

• Controller Compatibility: Specifically designed for use with Logix5550 controllers within the ControlLogix platform.

• Power Requirements: Draws 580 mA at 5 VDC and 3 mA at 24 VDC, with a maximum dissipation of 5.8 W for efficient operation.

• Thermal Ratings: Generates 19.8 BTU/hr, supporting stable thermal performance in industrial environments.

• Electrical Protection: Rated for 30 V continuous insulation voltage, enhancing system safety.

• Installation: Mounts in any slot of a ControlLogix chassis, offering flexibility in system layout.

The 1756-DNB delivers the reliability and precision required for bridging DeviceNet devices with ControlLogix controllers in industrial automation.

Manufacturer information

Allen-Bradley, a brand of Rockwell Automation, specializes in manufacturing industrial automation equipment. The product range includes programmable logic controllers (PLCs), motion control systems, safety devices, motor control equipment, automation software, and HMI panels. Allen-Bradley products are known for their reliability and integration with other systems.