Allen-Bradley 1794-AENTRXT Flex I/O Dual Port Ethernet Adapter Module

Product Overview

The Allen-Bradley 1794-AENTRXT is a Flex I/O dual port Ethernet adapter module from the Rockwell Automation 1794 series. This component enables a redundant Ethernet/IP control system to communicate with Flex I/O devices. It mounts on a DIN rail and operates without network scheduling or routing tables. The module supports up to 8 I/O modules in an extended temperature range, making it suitable for demanding industrial environments.

Technical Specifications Breakdown

Key parameters for the 1794-AENTRXT are listed below for quick reference:

Industry Applications

For example, in oil and gas facilities, the dual port Ethernet design ensures continuous communication with Flex I/O modules even if one network path fails. In water treatment plants, the conformal coating protects against corrosive gases, meeting ISA/ANSI-71.040 1985 standards. The extended temperature range supports outdoor or unheated enclosures.

Installation & Setup Guidance

Mount the 1794-AENTRXT on a zinc-plated yellow-chromate steel DIN rail to ensure proper grounding through the chassis. Use a SELV or PELV-compliant power supply to meet CE LVD requirements. Connect Category 5 Ethernet cables to the two ports. Do not replace or remove the module with power applied, as backplane interruption can cause unintended machine motion. Torque terminal screws to 0.8 N-m.

Maintenance & Reliability

The open enclosure design requires periodic inspection for dust and debris. The conformal coating provides protection against noxious gases, but the module should be handled using ESD precautions: use a static-safe workstation, wear grounded wrist straps, avoid touching components, and store in static-safe packaging. Verify the DIN rail grounding annually.

Compatibility & Integration

This module integrates with Allen-Bradley Flex I/O 1794 series I/O modules. It communicates via Ethernet/IP at 10/100 Mbps using two RJ-45 ports. The adapter supports redundant control systems without requiring network scheduling or routing tables, simplifying setup. Status indicators for module, network, Link 1, and Link 2 aid diagnostics.

Selection Guide & Purchasing Advice

When selecting the 1794-AENTRXT, confirm your system requires a dual port Ethernet adapter with conformal coating. For lifecycle status and availability, contact AutoDCSTech before ordering. AutoDCSTech stocks this and other Flex I/O components to support your automation needs.

Troubleshooting & Common Issues

If the module fails to communicate, check the Ethernet cable connections and verify the Link 1 and Link 2 indicators. Ensure the input voltage is within 19.2 to 31.2 Volts DC. If the module status indicator is off, confirm power supply compliance with SELV or PELV requirements. For persistent issues, inspect the DIN rail grounding.