Allen-Bradley 1756-EN2T B EtherNet/IP Bridge Module

The Allen-Bradley 1756-EN2T B acts as a critical communication hub for ControlLogix systems needing reliable connectivity to EtherNet/IP networks. This module excels in industrial environments where consistent data flow and network stability are essential, such as manufacturing lines or process control systems. Its dual-port design allows daisy-chaining devices, reducing cabling complexity while maintaining high-speed data exchange.

Technical Specifications

Common applications include connecting ControlLogix controllers to supervisory SCADA systems, linking remote I/O racks across large facilities, and integrating third-party devices into Rockwell Automation architectures. We frequently pair this module with CompactLogix 5370 controllers for mid-sized machine control projects where network scalability matters. One customer successfully used it to retrofit a 20-year-old bottling line, achieving 99.98% network uptime despite significant EMI from nearby VFDs.

What sets this module apart is its built-in port redundancy feature – if one network connection fails, the module automatically reroutes traffic through the secondary port within 50ms. The integrated web server provides real-time diagnostics, showing packet loss statistics and connection quality metrics. While configuration through Studio 5000 is straightforward, I recommend checking the module’s firmware version first – we’ve seen performance improvements after upgrading from version 1.7 to 2.3 in high-traffic networks.