Allen-Bradley 1756-EN2TRXT ControlLogix EtherNet/IP Extended Temperature Communication Module

Product Overview

The Allen-Bradley 1756-EN2TRXT functions as a high-performance, dual-port EtherNet/IP communication interface for the ControlLogix platform. This "XT" (Extended Temperature) version supports mission-critical networking in environments that exceed standard thermal limits. It enables bridge-and-route capabilities between EtherNet/IP networks and provides high-speed data exchange for I/O control, producer/consumer interlocking, and HMI connectivity. We supply this module as 100% brand new and original in factory-sealed packaging.

Part Number Breakdown

The 1756-EN2TRXT follows the modular nomenclature of the Rockwell Automation platform:

• 1756: Identifies the ControlLogix chassis-based system.

• EN2T: Specifies the high-performance EtherNet/IP bridge functionality.

• R: Indicates support for Device Level Ring (DLR) redundancy and linear topologies.

• XT: Designates "Extended Temperature" and conformal coating for harsh environments.

Technical Specifications

The 1756-EN2TRXT utilizes professional-grade components to meet the following parameters:

• Communication Protocol: EtherNet/IP

• Interface: 2 Copper RJ45 ports (10/100 Mbps)

• Architecture: Chassis-based (occupies any single slot)

• Network Topologies: Supports Device Level Ring (DLR), Linear, and Star

• Operating Temperature: 0°C to 60°C (32°F to 140°F) for standard rating; XT components allow for expanded thermal resilience.

• Display: Integrated 4-character digital alphanumeric display for status and diagnostics.

• Enclosure Type: Open-style (None)

• Backplane Current Draw: 1.0 A @ 5.1V DC

Engineering Advantages

• DLR Redundancy Implementation: The dual-port design facilitates a Device Level Ring (DLR) topology. This architecture maintains network integrity even if a physical cable breaks, preventing lost I/O connections and expensive process downtime.

• Harsh Environment Resilience: The XT designation ensures that internal components withstand thermal stress better than standard modules. When paired with other XT-rated ControlLogix hardware, this module operates reliably in remote field enclosures where climate control is unavailable.

• Streamlined Diagnostics: The front-facing digital display provides real-time IP address scrolling and error codes. This allows maintenance personnel to verify network status at a glance without connecting a laptop, significantly accelerating troubleshooting.

• High-Capacity Bridging: This module handles 128/256 CIP connections, allowing a single 1756-EN2TRXT to manage dozens of remote I/O racks and drives simultaneously while maintaining low-latency data throughput.

• Conformal Coating: Most XT modules include a conformal coating to protect against corrosive gases and humidity, extending the hardware's lifespan in chemical and wastewater treatment plants.

FAQs

• Can I use the 1756-EN2TRXT in a standard 1756-A7 chassis?

  Yes. The module is fully compatible with any standard 1756 ControlLogix chassis. However, to maintain the full "XT" temperature rating for the entire system, you must use it within an XT-rated chassis and environment.

• What is the difference between EN2TR and EN2TRXT?

  The EN2TRXT includes specialized components and treatments (like conformal coating) that allow for extended temperature operations and higher environmental resistance compared to the standard EN2TR.

• Does this module support "Hot Swapping"?

  Yes. The 1756-EN2TRXT supports Removal and Insertion Under Power (RIUP). You can replace the module without shutting down the entire chassis, though you must consider the temporary loss of network communication.

• How do I set the IP address for this module?

  You can set the IP address using the rotary switches on the module (for 192.168.1.xxx ranges) or via the BOOTP/DHCP utility and Studio 5000 Logix Designer software.