Industry Trends in Ethernet Communication Modules
Manufacturers increasingly demand reliable, high-speed communication for real-time control and data exchange in industrial automation. The shift toward Industry 4.0 and the Industrial Internet of Things (IIoT) drives the need for robust Ethernet-based modules that support redundancy and high connection counts. The Allen-Bradley 1756-EN2TR addresses these requirements with dual-port design and advanced protocol support.
Introducing the 1756-EN2TR from Petro Auto Tech
When engineers face the challenge of building a resilient Ethernet network for a ControlLogix system, the Allen-Bradley 1756-EN2TR offers a proven solution. This communication module is part of the ControlLogix series and functions as an EtherNet/IP bridge with two RJ45 ports operating at 10/100 Mbps. It supports up to 128 TCP/IP connections and 256 CIP connections, making it suitable for large-scale distributed I/O and motion control applications.
Technical Specifications Analysis
The 1756-EN2TR draws 1 amp from the 5-volt backplane and 3 milliamps from the 24-volt backplane, with a total power consumption of 5.1 watts. Its thermal dissipation is rated at 21.28 BTU per hour, ensuring efficient heat management within the chassis. The module operates in temperatures from 32 to 140 degrees Fahrenheit (0 to 60 degrees Celsius) and fits in any slot of the ControlLogix chassis with a width of one slot.
Application Scenarios and Use Cases
In a manufacturing plant requiring redundant Ethernet for critical I/O, the 1756-EN2TR supports Device Level Ring (DLR) and Parallel Redundancy Protocol (PRP) topologies. This ensures minimal downtime during network failures. For motion control applications, the module can manage up to 8 axes over EtherNet/IP, enabling coordinated servo drives in packaging or assembly lines.
Customer Case Scenario
Consider a food and beverage facility upgrading its control network to improve uptime. By deploying the 1756-EN2TR in a ring topology with redundant cabling, the plant achieves seamless failover and maintains real-time communication with remote I/O blocks. This illustration highlights how the module enhances network reliability without requiring additional scheduling or routing tables.
Compatibility and Integration
The 1756-EN2TR integrates with Allen-Bradley controllers such as CompactLogix, SLC 500, PLC-5, and MicroLogix via message instructions. It also communicates with HMI and SCADA systems from the same brand or third-party products using standard EtherNet/IP. The module uses unshielded RJ45 connectors with Category 5 or 6 twisted-pair cables, simplifying installation.
Company Strength and Supply Assurance
Petro Auto Tech specializes in industrial automation parts, offering genuine Allen-Bradley modules like the 1756-EN2TR with reliable sourcing and competitive pricing. Our team provides technical support to help you select the right components for your ControlLogix system.
Frequently Asked Questions About the 1756-EN2TR
Q: What is the maximum number of TCP/IP connections supported by the 1756-EN2TR?
A: The module supports up to 128 TCP/IP connections simultaneously, as specified in its technical data.
Q: Can the 1756-EN2TR be used in redundant Ethernet networks?
A: Yes, it is designed for redundant networks and supports Device Level Ring (DLR) and Parallel Redundancy Protocol (PRP) topologies.
Q: What is the power consumption of the 1756-EN2TR?
A: The module consumes 5.1 watts of power and dissipates 21.28 BTU per hour, drawing 1 amp from the 5-volt backplane.
Q: Does the 1756-EN2TR support motion control?
A: Yes, it supports up to 8 axes for integrated motion on the EtherNet/IP network, making it suitable for servo drive applications.
Q: How do I configure the IP address for the 1756-EN2TR?
A: Initial IP address configuration can be performed using the Allen-Bradley BOOTP-DHCP tool, which is also used for other Ethernet devices.
Conclusion and Outlook
The Allen-Bradley 1756-EN2TR remains a reliable choice for engineers building scalable, redundant Ethernet networks in ControlLogix environments. As industrial communication demands grow, modules like this will continue to play a key role in enabling efficient data exchange and motion control. For current lifecycle status and availability, please verify with Petro Auto Tech before ordering.
