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Phone: +86 16626708626Description
Real-World Use & Application Scenarios
In modern industrial automation, the rapid and reliable exchange of real-time data over Ethernet networks is essential for efficient control and monitoring. The Allen-Bradley 1756-EN2T module facilitates this in industries such as manufacturing, oil and gas, pharmaceuticals, and power generation by integrating ControlLogix controllers into Ethernet/IP networks. This enables seamless communication between devices, supervisory control systems, and enterprise networks, addressing challenges like network congestion, data throughput, and system scalability.
The 1756-EN2T is ideal for applications requiring integration of multiple devices across plant floors, supporting communication for up to 256 Logix connections and 128 TCP/IP connections. It helps engineers tackle challenges in distributed control systems, providing fast cycle times and reliable data integrity with robust Ethernet connectivity.
Product Introduction & Positioning
The Allen-Bradley 1756-EN2T is an Ethernet communication bridge module, providing a single RJ45 port for 10/100 Mbps Ethernet communication and a USB 1.1 port for programming and diagnostics. It fits in any ControlLogix chassis slot and supports Ethernet/IP protocol, which is widely used in industrial networks for interoperability and process automation.
Engineers select the 1756-EN2T to expand ControlLogix networks, enabling high-speed data transfers and device integration across various Ethernet/IP-enabled equipment. The module supports both cyclic I/O and explicit messaging, allowing diverse control and information flow suited for complex automation architectures or industry 4.0 initiatives.
- 1756-EN2TXT
Key Technical Features & Functional Benefits
The 1756-EN2T offers 10/100 Mbps Ethernet transmission speeds with auto-negotiation to optimize network performance. It supports up to 256 Logix communications and 128 TCP/IP connections, enabling large network capacity for extensive plant automation systems. The module also supports EtherNet/IP and EtherNet/Open Control Protocol (OCPP), increasing compatibility.
Power consumption is modest at approximately 5.1W with thermal dissipation of 21.28 BTU/hr, suitable for control cabinets with standard cooling. It features basic insulation voltage of 30V continuous between Ethernet and backplane, ensuring safety and noise immunity. The module operates reliably between 0°C and 60°C with 5–95% non-condensing relative humidity tolerance, tested against IEC standards for shock and vibration.
The USB 1.1 port enables local device programming and troubleshooting, enhancing engineer productivity. Integration with Rockwell Automation’s Studio 5000 Logix Designer software ensures straightforward configuration, diagnostics, and maintenance workflows.
Detailed Technical Specifications
| Parameter | Value |
|---|---|
| Model | 1756-EN2T |
| Brand | Allen-Bradley |
| Product Type | Ethernet/IP Communication Module |
| Ethernet Port | 1 RJ45 (10/100 Mbps) |
| USB Port | 1 USB 1.1 (programming and diagnostics) |
| Protocols Supported | Ethernet/IP, EtherNet/Open Control Protocol (OCPP) |
| Max Logix Connections | 256 |
| Max TCP/IP Connections | 128 |
| Power Consumption | 5.1 Watts |
| Thermal Dissipation | 21.28 BTU/hr |
| Operating Temperature | 0°C to 60°C |
| Operating Humidity | 5–95% non-condensing |
| Isolation Voltage | 30 V continuous (Ethernet to backplane) |
| Mounting | ControlLogix chassis, any slot |
| Dimensions (HxWxD) | Approx. 5.51 in x 4.41 in x 5.71 in |
Related Modules or Compatible Units
Allen-Bradley 1756-EN2TR – Dual-port Ethernet/IP communication module supporting network redundancy.
Allen-Bradley 1756-EN2TXT – High-performance Ethernet/IP bridge with embedded switch.
Allen-Bradley 1756-RM2 – Redundancy module for ControlLogix controller fault tolerance.
Allen-Bradley 1756-L71 – ControlLogix mid-range controller compatible with 1756-EN2T networking.
Allen-Bradley 1756-IF16 – Analog input module complementing Ethernet communication modules.
Installation Notes & Maintenance Best Practices
Install the 1756-EN2T module in any ControlLogix chassis slot, ensuring secure Ethernet cable connection using Category 5e shielded twisted pair cables or better for network performance and noise reduction. Maintain ambient temperature between 0°C and 60°C, and avoid excessive humidity or contaminants.
Routine maintenance should focus on verifying network connectivity and module diagnostics using Studio 5000 Logix Designer. Keep firmware updated to benefit from latest features and security patches. Regular inspection of connectors and cables helps prevent communication failures.
