Description

Product Description

The Allen-Bradley 1756-EN2TR serves as a high-capacity communication bridge within the ControlLogix platform, providing dual-port EtherNet/IP connectivity for sophisticated industrial networks. This module facilitates high-speed data exchange between controllers, I/O devices, and supervisory systems. Because it supports the Common Industrial Protocol (CIP), the module simultaneously manages real-time control, device configuration, and diagnostics over a single network architecture.

Network reliability represents a core advantage of the 1756-EN2TR. The integrated dual RJ45 ports allow users to implement Device Level Ring (DLR) topologies. Consequently, the system maintains continuous communication even if a physical cable break occurs, as the DLR protocol automatically reroutes data packets. Furthermore, the module supports CIP Safety, which enables the transmission of safety-critical data alongside standard control traffic, streamlining infrastructure requirements for guarded applications.

Integration remains straightforward as the module fits into any slot of a standard 1756 ControlLogix chassis. It handles up to 256 CIP connections and 128 TCP/IP sessions, making it suitable for large-scale distributed control systems and multi-axis motion control. By utilizing standard Category 5 or 6 cabling and BOOTP/DHCP tools for IP assignment, technicians can rapidly commission the hardware and achieve deterministic performance across the entire automation environment.

Technical Specifications

• Manufacturer: Allen-Bradley / Rockwell Automation
• Model Identification: 1756-EN2TR
• Module Type: EtherNet/IP Communication Bridge
• Communication Ports: 2 x RJ45 Ethernet
• Network Topologies: Star, Linear, and Device Level Ring (DLR)
• Connection Capacity: 256 CIP connections; 128 TCP/IP connections
• Packet Rate: 10,000 packets per second (I/O)
• Backplane Current: 1.0 A @ 5.1V DC; 3 mA @ 24V DC
• Power Dissipation: 5.1 Watts
• Operating Temperature: 0 to 60 °C (32 to 140 °F)
• Weight: 0.9 kg
• Dimensions: 3.5 x 13 x 14.5 cm