Product Overview

The Allen-Bradley 1756-EN2T functions as a high-performance EtherNet/IP bridge for the ControlLogix platform. It facilitates seamless data exchange between your controller and enterprise-level networks, as well as high-speed communication with I/O, drives, and other Logix processors. We supply this module as 100% Brand New and Factory Sealed, ensuring your system benefits from the latest hardware revisions and maximum security protocols. This module occupies a single slot and enables robust star or linear network topologies.

 Technical Specifications

Engineering Advantages

• High-Bandwidth Performance: The 1756-EN2T handles up to 5,000 packets per second, ensuring that high-density I/O and motion control data travel across the network without latency or jitter.

• Secure & Isolated Architecture: This module provides 30V continuous isolation between the Ethernet network and the ControlLogix backplane, protecting your PLC CPU from external electrical noise and surges.

• Simplified Maintenance: The front-facing USB port allows technicians to bridge directly to the backplane for configuration and firmware updates, bypassing the need for complex network routing during initial commissioning.

• Massive Connectivity: Supporting 128 TCP/IP connections, a single 1756-EN2T can manage communications for dozens of PowerFlex drives, HMI panels, and remote I/O racks simultaneously.

FAQs

What is the difference between the 1756-EN2T and the 1756-ENBT?

The 1756-EN2T significantly outperforms the legacy 1756-ENBT. It increases the connection capacity from 64 to 128 TCP/IP connections and handles roughly double the packet throughput. We recommend the EN2T for all modern installations and as a superior replacement for ENBT modules in bandwidth-heavy systems.

Does the 1756-EN2T support Device Level Ring (DLR)?

No. While the 1756-EN2T features two physical ports on some hardware revisions, it primarily supports star and linear topologies. If your application requires high-availability ring redundancy, you should select the 1756-EN2TR.

Can I use the USB port for HMI communication?

No. The USB port serves exclusively for programming, configuration, and firmware updates. You must use the RJ45 Ethernet ports for all runtime communications, including HMI, SCADA, and peer-to-peer data exchange.

Is there isolation between the USB port and the backplane?

The 1756-EN2T provides basic insulation (30V continuous) between the Ethernet network and the backplane, but there is no isolation between the USB port and the backplane logic. Use caution when connecting grounded laptops to the USB port to avoid ground loops.