Allen-Bradley 1769-ADN CompactLogix DeviceNet Adapter Module

Product Overview

The 1769-ADN is a DeviceNet communication adapter that enables 1769 Compact I/O modules to operate as a distributed I/O station on a DeviceNet network. Using the Common Industrial Protocol (CIP), it provides seamless data collection, control, and configuration between plant-floor devices—such as sensors and actuators—and a master controller.

The module is ideal for expanding I/O capacity over long distances without requiring a local processor at every station, reducing wiring complexity and overall system costs.

Technical Specifications

Network and Expansion Features

• Slave Module: Operates as a DeviceNet slave managed by a scanner (e.g., 1769-SDN).

• Flexible Topology: Supports trunkline-dropline layouts for distributed I/O.

• Easy Configuration: Node addresses set via front rotary switches.

• Module Compatibility: Works with nearly all 1769 Compact I/O digital, analog, and specialty modules.

• Diagnostics: Status LEDs for Module, Network, and I/O facilitate rapid troubleshooting.

Installation Guidelines

• Power Requirements: The 1769-ADN does not supply power to I/O modules; use a separate 1769-PA2, PB2, PA4, or PB4 supply.

• Termination: Use 121 Ω resistors at both ends of the DeviceNet trunk line to maintain signal stability.

• Distance Rating: Position the 1769-ADN within the power supply distance rating of connected modules (typically 4–8 slots).

Common Technical Questions

• Can I use the 1769-ADN to control a machine without a PLC?
  No. The 1769-ADN is a slave adapter and requires a master device, such as a CompactLogix controller with a 1769-SDN or SLC 5/00 with a 1747-SDN, to manage I/O data.

• What is the difference between Series A and Series B?
  Series B offers improved firmware stability and a slightly higher backplane current draw (500 mA vs. 450 mA). Check your power supply budget when upgrading from Series A to B.