1756-DNB Product datasheet 

1756-DNB Functional Description

The Communication Module Allen-Bradley 1756-DNB  serves as a vital communication bridge within the ControlLogix architecture, functioning specifically as a DeviceNet scanner module. Its primary role is to manage data exchange between the central controller and a network of up to 63 field devices on the DeviceNet network, such as sensors, drives, and actuators. The robust design of the module ensures reliable integration of distributed I/O into the automation system.

A key operational feature of the 1756-DNB Allen-Bradley ControlLogix DeviceNet Comms Module is its support for high-speed communication, offering configurable data rates up to 500 kilobits per second to meet various application demands. The module efficiently handles different messaging methods, including poll, strob, and change-of-state, to optimize network bandwidth and responsiveness. This flexible communication capability is a significant advantage of the module, enabling efficient data handling for both discrete and analog devices.

The module provides comprehensive diagnostic capabilities, allowing users to monitor the health and status of the entire DeviceNet network from the controller. This includes detecting device failures, network interruptions, and configuration errors, which facilitates quick troubleshooting and minimizes system downtime. The diagnostic power of the ControlLogix DeviceNet Comms Module Allen Bradley 1756-DNB greatly enhances maintenance efficiency and system reliability.

With its modular design, the ROCKWELL 1756-DNB ControlLogix chassis can be installed in any available slot of the ControlLogix chassis, offering flexible system configuration. It works seamlessly with Rockwell Automation's configuration tools like RSNetWorx for DeviceNet for easy setup and maintenance. The proven performance and integration ease of the Scanner Module 1756-DNB Allen-Bradley make it an essential component for implementing robust DeviceNet networks in industrial automation environments.