Allen-Bradley 1756-EN2TRXT/C ControlLogix XT EtherNet/IP Bridge

Allen-Bradley 1756-EN2TRXT/C is a ControlLogix XT EtherNet/IP bridge module designed for ControlLogix systems operating in extended-environment applications. The module provides high-capacity EtherNet/IP communication for I/O, HMI, messaging, and motion control traffic while supporting redundant industrial networking requirements in installations exposed to wider operating temperature ranges.

EtherNet/IP Network Interface

The 1756-EN2TRXT functions as a communication bridge between the ControlLogix backplane and EtherNet/IP devices on the control network. It enables data exchange with distributed I/O systems, operator interfaces, controllers, drives, and other EtherNet/IP compatible equipment.

The module is designed to manage both real-time control traffic and supervisory communications within a ControlLogix architecture.

Communication Performance

The bridge supports high network throughput for demanding automation applications.

Communication capacity includes:

• Up to 25,000 packets per second for I/O traffic.

• Up to 2,000 packets per second for HMI and MSG communications.

• Concurrent support for control and information-level network communications.

These performance characteristics make the module suitable for systems requiring large numbers of EtherNet/IP connections and fast update rates.

Integrated Motion Support

The 1756-EN2TRXT supports Integrated Motion on the EtherNet/IP network.

The module can support up to 8 motion axes, enabling coordinated motion applications through the ControlLogix platform when used with compatible controllers, drives, and software configurations.

Extended Environment Design

As a member of the ControlLogix XT family, the module is intended for applications requiring operation in extended-environment conditions.

The XT architecture is designed to provide ControlLogix system functionality in locations where environmental conditions exceed the limits of standard commercial installations. The specific operating temperature limits depend on the complete system configuration and associated hardware.

Software and Firmware Requirements

Proper operation requires compatible firmware and engineering software versions.

Supported versions include:

• Firmware Revision 5.028 or later.

• RSLogix 5000 software Version 20.01.00 or later.

• RSLinx software Version 2.56 or later.

These version requirements should be verified during system upgrades or replacement projects to ensure compatibility with the installed ControlLogix platform.

Technical Specifications

Application Considerations

The 1756-EN2TRXT is intended for ControlLogix systems that require EtherNet/IP network integration together with enhanced environmental capability. When replacing an existing communication module, the firmware revision and engineering software versions should be reviewed to ensure continued compatibility with the controller and network architecture.

Frequently Asked Questions

Q: What is the primary function of the 1756-EN2TRXT/C module?

A: The module serves as a ControlLogix XT EtherNet/IP bridge, linking the ControlLogix backplane to EtherNet/IP networks for I/O, HMI, messaging, and motion communications.

Q: How much communication traffic can the module support?

A: The module supports up to 25,000 packets per second for I/O communications and up to 2,000 packets per second for HMI and MSG traffic.

Q: Does the 1756-EN2TRXT/C support EtherNet/IP motion control?

A: Yes. The module supports Integrated Motion on EtherNet/IP and can support up to 8 motion axes when used within a compatible ControlLogix system.