1769-ADN | Allen-Bradley DeviceNet Communication Adapter

Allen-Bradley 1769-ADN CompactLogix DeviceNet Adapter Module

Product Overview

The 1769-ADN is a high-performance DeviceNet communication adapter designed for the Allen-Bradley Compact I/O system. This module acts as a bridge, allowing Compact I/O modules to be used as distributed I/O on a DeviceNet network. Whether you are using Series A or Series B hardware, this adapter provides seamless integration with a variety of controllers, enabling efficient data exchange and remote system management. With its versatile baud rate support and extensive diagnostic capabilities, it is a critical component for modernizing industrial control networks.

Core Technical Advantages

Engineered for high-speed industrial environments, this adapter supports three standard DeviceNet data transfer speeds: 125k, 250k, and 500k bit/s. It features a comprehensive array of LED indicators for Module, Network, I/O, and Diagnostic status, allowing for rapid troubleshooting at a glance. The hardware is designed to operate within a broad temperature range (0°C to 60°C) and handles high-humidity environments up to 95% non-condensing. Its robust backplane performance supports 450mA to 500mA current draw, ensuring stable power distribution to connected I/O modules.

Technical Specifications

Installation & Engineering Guide

Proper installation of the module requires careful consideration of the power supply distance rating. For Series A hardware, the module must be within 4 meters of the power supply, while Series B allows for a distance of up to 5 meters. During network configuration, ensure that the baud rate matches the rest of the DeviceNet trunk line. The adapter should be mounted securely on a DIN rail or panel, following standard CompactLogix spacing requirements to allow for adequate heat dissipation of its 7.5W power output. Verify that the network termination resistors are correctly placed to ensure high-fidelity signal transmission.

Engineering Advantages

The Allen-Bradley distributed I/O architecture significantly reduces wiring costs by allowing I/O modules to be located closer to sensors and actuators. Designed with a shipping weight of approximately 2 lbs (0.91 kg), the module is robust yet easy to manage during complex control panel upgrades. Its compatibility with various DeviceNet scanners and the DeviceNet Foundation certification guarantee long-term interoperability. By using the high-performance backplane of the 1769 system, this adapter ensures deterministic data processing, which is essential for time-critical automation applications in packaging, material handling, and automotive assembly lines.

Technical FAQs

Q1: Does this module require a separate power supply?
A1: The module draws logic power from the 1769 backplane. However, the DeviceNet network itself requires a separate 24V DC power source to power the communication transceiver according to network standards.

Q2: Can I use this adapter with a MicroLogix controller?
A2: Yes, this adapter can be used to connect Compact I/O banks to any controller that has a DeviceNet scanner, including MicroLogix 1500 or ControlLogix systems.

Q3: How do I set the node address for the adapter?
A3: The node address is typically set via hardware rotary switches located on the front of the module or through software configuration using RSNetWorx for DeviceNet.