Allen-Bradley 1734-ADNX DeviceNet Adapter Module

1734-ADNX POINT I/O DeviceNet Adapter – Advanced Network Interface

Product Introduction

The 1734-ADNX from Allen-Bradley serves as a sophisticated DeviceNet communication adapter within the POINT I/O family. This module simultaneously resides on both the primary DeviceNet network and a local Subnet, acting as a scanner and master on the Subnet while functioning as a slave to DeviceNet masters. Additionally, it includes an Auto Catalog Replace feature that corrects errors when backplane modules are removed and replaced in incorrect locations. The 1734-ADNX also supports Auto Start Mode for simplified installation and operation. For engineers building distributed I/O systems, this adapter delivers both flexibility and intelligent error management.

Key Technical Specifications

This DeviceNet adapter operates on a nominal 24 Volts DC input voltage and draws 400 milliamps of field-side power. Its inrush current reaches 6 amps during startup, which is typical for this class of device. The 1734-ADNX consumes 8.1 watts of total power and dissipates approximately 2.8 watts at 28.8 Volts DC. For backplane communication, it supplies 1000 milliamps of POINTBus current to power connected I/O modules. Communication rates are selectable at 125K, 250K, or 500K bits per second, matching standard DeviceNet speeds. The module mounts on the leftmost position of a POINT I/O system, occupying a single slot. For CE compliance, use a SELV or PELV power supply with a nominal 24 Volts DC rating.

Dual-Network Architecture

The 1734-ADNX offers a unique dual-network capability that enhances system flexibility. On the Subnet side, it acts as a scanner and master, controlling all local POINT I/O modules directly. On the primary DeviceNet network, it serves as a slave device, receiving commands and returning data to DeviceNet masters such as PLCs or other controllers. This architecture allows the 1734-ADNX to manage local I/O independently while still integrating seamlessly into a broader DeviceNet infrastructure. Furthermore, it supports both I/O connections for cyclic data exchange and explicit connections for configuration and diagnostics, using I/O mapping to determine data arrangement within each connection.

Advanced Error Correction: Auto Catalog Replace

One standout feature of the 1734-ADNX is its Auto Catalog Replace functionality. When you remove and replace backplane modules, errors can occur if the new module occupies a different location than the original. This adapter automatically detects such discrepancies and corrects them, ensuring that the system continues to operate correctly without manual intervention. Coupled with the Auto Start Mode, which simplifies initial setup, these features significantly reduce commissioning time and minimize the risk of configuration errors. Consequently, the 1734-ADNX proves especially valuable in maintenance-intensive environments where modules are frequently swapped.

Installation Guidelines

Installing the 1734-ADNX requires a standard DIN rail and a SELV/PELV-compliant 24V DC power source. Begin by positioning the adapter vertically against the DIN rail at the leftmost side of the POINT I/O assembly. Apply firm pressure until the locking mechanism engages automatically. Next, attach the DeviceNet connector to the terminal block and secure the retaining screws on both sides. For network configuration, set the appropriate node address using the embedded thumbwheel switch or through software configuration. The adapter automatically detects the network baud rate via its autobaud function, simplifying integration with existing DeviceNet networks. Finally, power up the system and verify the status indicators—three red/green LEDs for network and module status, plus two green LEDs for power supply status.

Mechanical and Environmental Parameters

The 1734-ADNX operates reliably within a temperature range of 0 to 55 degrees Celsius and stores safely between -40 and 85 degrees Celsius. It withstands non-condensing humidity from 5 to 95 percent, making it suitable for most industrial environments. For vibration resistance, it handles 5 G at 10 to 500 Hertz, and shock tolerance reaches 30 G. The module mounts directly on a DIN rail and occupies the leftmost position of the POINT I/O system. Its low power dissipation of just 2.8 watts ensures minimal heat buildup even in densely populated cabinets.

Application Scenarios

This DeviceNet adapter excels in distributed I/O applications where intelligent error handling is a priority. For instance, you can deploy the 1734-ADNX in packaging machinery, material handling systems, or assembly lines where modules may need frequent replacement. Its Auto Catalog Replace feature reduces downtime by automatically correcting location errors, while the dual-network architecture allows for flexible system design. Furthermore, its support for both I/O and explicit connections makes it suitable for applications requiring both real-time data exchange and occasional configuration updates. Whether used in new installations or as an upgrade to existing POINT I/O systems, the 1734-ADNX delivers reliable and intelligent connectivity.

Packaging List

• Allen-Bradley 1734-ADNX DeviceNet Adapter Module (1 unit)

• Removable DeviceNet terminal block (pre-attached)

• DIN rail mounting base (integrated)

• Quick start installation guide

• Anti-static protective packaging

Shipping Information

All orders are shipped via FedEx, UPS, or DHL with full tracking and insurance coverage. Express shipping options are available upon request.

Frequently Asked Questions

Q1: What is the difference between the 1734-ADN and the 1734-ADNX?
The 1734-ADNX includes advanced features like Auto Catalog Replace and Auto Start Mode, which the standard 1734-ADN does not offer.

Q2: How does Auto Catalog Replace work on the 1734-ADNX?
This feature automatically detects and corrects errors when backplane modules are removed and replaced in wrong locations, ensuring continuous system operation without manual reconfiguration.

Q3: Can the 1734-ADNX act as a master on the Subnet?
Yes, on the Subnet it functions as a scanner and master, controlling all local POINT I/O modules directly.

Q4: What type of power supply do I need for the 1734-ADNX?
For CE compliance, use a SELV (Safety Extra Low Voltage) or PELV (Protected Extra Low Voltage) power supply with a nominal 24 Volts DC rating.

Q5: How many I/O modules can I connect to one 1734-ADNX?
You can connect up to 63 POINT I/O modules per adapter, provided you supply adequate power using additional 1734-EP24DC power supplies as needed.