Solving Network Redundancy Challenges in Industrial Automation
When production lines demand continuous uptime, network failures become a critical pain point. Engineers need communication modules that maintain connectivity even when a link drops. The Allen-Bradley 1756-EN2TR addresses this challenge directly with its dual-port design and support for redundant Ethernet topologies.
Introducing the 1756-EN2TR from Allen-Bradley
Petro Auto Tech now offers the Allen-Bradley 1756-EN2TR, a ControlLogix Ethernet communication module engineered for high-availability networks. This module features two RJ45 ports and a USB 1.1 port, enabling redundant or device-level ring configurations. It operates at 10/100 Mbps with auto-negotiation, simplifying integration into existing infrastructure.
Key Technical Specifications That Matter
The 1756-EN2TR draws 1 amp from the 5-volt backplane and 3 milliamps from the 24-volt supply, with total power consumption of 5.1 watts. It supports up to 128 TCP/IP connections and 256 CIP connections, handling demanding I/O and messaging loads. The module dissipates 21.28 BTU per hour and operates from 32 to 140 degrees Fahrenheit (0 to 60 degrees Celsius).
Real-World Applications for the 1756-EN2TR
In a manufacturing plant with multiple ControlLogix controllers, the 1756-EN2TR enables seamless data exchange between PLCs, HMIs, and SCADA systems. Its dual-port capability allows engineers to implement a Device Level Ring (DLR) network, which automatically recovers from a single cable break. This module also supports up to 8 axes of integrated motion over Ethernet/IP, making it suitable for coordinated motion control applications.
Customer Scenario: Ensuring Uptime in a Packaging Line
Consider a packaging facility that experienced frequent network outages due to cable damage. By deploying the 1756-EN2TR in a ring topology, the plant achieved automatic failover within milliseconds. This illustration shows how the module's redundant design directly reduces unplanned downtime and maintenance costs.
Compatibility and Integration with Existing Systems
The 1756-EN2TR integrates with ControlLogix chassis in any slot and communicates with Allen-Bradley controllers such as SLC 500, PLC-5, and MicroLogix. It also works with third-party devices through Ethernet/IP, and supports BOOTP-DHCP for initial IP configuration. Category 5 or 6 twisted-pair cables provide the physical connection.
Why Choose Petro Auto Tech for Your 1756-EN2TR
Petro Auto Tech specializes in industrial automation parts, offering genuine Allen-Bradley modules with fast shipping. Our team provides technical support to help you select the right components for your network architecture. We ensure every 1756-EN2TR is tested and ready for deployment.
Frequently Asked Questions About the 1756-EN2TR
What is the maximum number of TCP/IP connections supported by the 1756-EN2TR?
The module supports up to 128 TCP/IP connections simultaneously, as specified in the technical data.
Can the 1756-EN2TR be used in a redundant Ethernet network?
Yes, the dual RJ45 ports enable ring and linear topologies, including Device Level Ring and Parallel Redundancy Protocol, for high availability.
What is the power consumption of the 1756-EN2TR?
The module consumes 5.1 watts and draws 1.2 amps, with thermal dissipation of 21.28 BTU per hour.
Conclusion and Future Outlook
As industrial networks demand higher reliability, the 1756-EN2TR provides a proven solution for redundant communication. Petro Auto Tech continues to stock this module to support manufacturers upgrading their control systems. Contact us to verify current lifecycle status and availability before ordering.
