Product Overview

The Allen-Bradley 1794-AENTRXT is an "Extended Duty" (XT) communication interface designed for the FLEX™ I/O platform. This module serves as a high-performance bridge between EtherNet/IP networks and distributed I/O modules, allowing for seamless data exchange with programmable logic controllers (PLCs). The "XT" designation signifies its specialized engineering for extreme environments, featuring a conformal coating to protect against corrosive atmospheres and an expanded thermal operating range that exceeds standard industrial hardware limits.

Equipped with dual Ethernet ports, the 1794-AENTRXT supports Device Level Ring (DLR) topologies, which provide critical network redundancy. In the event of a cable break, the DLR capability ensures that communication remains active, minimizing system downtime. This adapter is the ideal choice for distributed control systems in offshore rigs, wastewater treatment plants, and remote pump stations where reliability is non-negotiable.

Technical Capabilities and Network Resiliency

The 1794-AENTRXT is optimized for high-speed connectivity and environmental protection in hazardous or remote locations.

• Dual-Port Redundancy: Supports DLR (Device Level Ring), Linear, and Star network topologies to ensure continuous operation during single-point network failures.

• Extended Thermal Performance: Rated for reliable operation in temperatures ranging from -20°C to +70°C (-4°F to +158°F).

• Chemical Resistance: Factory-applied conformal coating meets ISA/ANSI-71.040-1985 G3 standards, providing a barrier against noxious gases and high humidity.

• High-Speed Processing: Delivers 10/100 Mbps communication rates with full-duplex support for low-latency I/O updates.

• Integrated Power Regulation: Efficiently converts a 24V DC input into the 5V DC backplane power required to drive up to eight attached FLEX I/O modules.

Technical Specifications

• Manufacturer: Allen-Bradley (Rockwell Automation)

• Model Number: 1794-AENTRXT

• Module Type: EtherNet/IP Network Adapter (Extended Duty)

• Ports: 2 x RJ45 EtherNet/IP (DLR Capable)

• Communication Speed: 10/100 Mbps

• Module Capacity: Supports up to 8 FLEX I/O modules

• Input Voltage: 24V DC (19.2–31.2V DC range)

• Nominal Input Current: 450mA @ 24V DC

• Power Dissipation: 7.3 Watts (maximum)

• Hazardous Area Rating: North American Class I Div 2 / ATEX Zone 2

• Dimensions: 9.4 x 8.8 x 7.7 cm

• Weight: 0.18 kg

Application and System Integration

The 1794-AENTRXT is specifically utilized in industries requiring "Extreme Environment" (XT) certified hardware:

• Oil & Gas Production: Monitoring wellheads and separators in high-temperature, corrosive environments.

• Mining Operations: Providing distributed I/O for processing equipment exposed to dust and vibration.

• Water/Wastewater: Managing remote lift stations and chemical dosing systems.

• Global Logistics: Operating in non-climate-controlled warehouses and outdoor terminal cabinets.