Allen Bradley 1756-EN2TXT ControlLogix EtherNet/IP Extended Temperature Bridge

Product Overview

The Allen Bradley 1756-EN2TXT functions as a high-performance communication bridge within the ControlLogix platform, specifically engineered for extreme environmental conditions. This module facilitates high-speed EtherNet/IP data exchange, allowing a ControlLogix chassis to connect with remote I/O, other controllers, and HMI systems. The "XT" designation signifies the Extended Temperature rating, enabling the hardware to operate reliably in environments that exceed standard commercial limits. We supply this module as 100% Brand New and Factory Original, ensuring your critical network infrastructure benefits from the full performance specifications of a zero-hour unit.

Technical Specifications

The 1756-EN2TXT utilizes a dual-port architecture with an embedded switch to manage high-volume network traffic:

Engineering Advantages

• Extended Temperature Resilience: The 1756-EN2TXT withstands extreme thermal fluctuations. This makes it the primary choice for remote terminal units (RTUs), outdoor control cabinets, and oil-and-gas field applications where standard communication modules often suffer from thermal-induced logic errors.

• Integrated Device Level Ring (DLR): The embedded switch supports DLR topology. This allows the network to maintain communication even if a single point in the ring fails, providing the high availability necessary for mission-critical process control.

• High Connection Density: With support for 128 TCP/IP and 256 Logix connections, this module manages massive data throughput. It prevents network bottlenecks in complex architectures involving multiple HMIs, high-speed drives, and distributed I/O racks.

• Simplified Configuration: The integrated USB 1.1 port enables rapid local diagnostics and IP address assignment. Engineers can configure the module directly from a laptop without requiring an established Ethernet connection, reducing commissioning time in the field.

• Flexible Chassis Placement: The module installs into any available slot in a standard or "XT" ControlLogix chassis. It draws power directly from the backplane, eliminating the need for external power wiring and simplifying cabinet cable management.

FAQs

• Is the 1756-EN2TXT 100% Brand New?

  Yes. We supply this unit in 100% Brand New condition, including the original factory-sealed box. We do not provide refurbished or used surplus, as communication bridges in extreme environments require fresh components to guarantee the advertised MTBF (Mean Time Between Failures).

• What is the difference between the 1756-EN2T and the 1756-EN2TXT?

  The 1756-EN2TXT includes specialized "XT" (Extended Temperature) components and often features conformal coating to protect against harsh atmospheres. It operates in much wider temperature ranges than the standard 1756-EN2T.

• Does this module support "Hot Swapping"?

  Yes, the 1756-EN2TXT 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 for the associated nodes.

• Can I use the two Ethernet ports for two separate networks?

  The embedded switch typically treats the two ports as part of the same network (Linear or DLR topology). They share a single IP address to facilitate daisy-chaining and ring redundancy rather than acting as independent network interfaces.