Allen-Bradley 1756-EN2TRK ControlLogix EtherNet/IP Communication Module

The Allen-Bradley 1756-EN2TRK is a high-performance EtherNet/IP communication bridge module designed for the ControlLogix platform. This specific model features a factory-applied conformal coating, providing enhanced protection for internal circuitry against harsh environmental factors, including high humidity, airborne contaminants, and corrosive chemical vapors. It is an ideal solution for critical infrastructure applications such as petrochemical refining, water treatment, and heavy industrial processing where environmental resilience is paramount.

Features

• Conformal Coating: Specialized protection on internal components to ensure reliable operation in corrosive or high-moisture environments.
• Dual-Port Architecture: Equipped with two RJ45 ports to facilitate flexible network configurations, including linear, star, and Device Level Ring (DLR) topologies.
• Network Resiliency: Supports DLR to maintain network continuity and minimize downtime in the event of a single cable failure.
• High-Speed Communication: Operates at 10/100 Mbps with auto-negotiation capabilities for seamless integration into existing Ethernet infrastructures.
• Diagnostic Support: Includes a dedicated USB port for local diagnostics and module configuration.

Applications

This module is engineered for demanding industrial automation environments that require reliable data transmission between ControlLogix controllers and remote I/O or other networked devices. Its robust design makes it suitable for deployment in facilities exposed to dust, moisture, and chemical agents, ensuring consistent communication performance in challenging conditions.

Technical Specifications

Installation Guidelines

• ESD Protection: Always utilize an anti-static wrist strap or similar grounding equipment when handling the module to prevent electrostatic discharge damage.
• Power Management: Ensure the ControlLogix chassis is powered down before inserting or removing the module from the backplane.
• Slot Placement: The 1756-EN2TRK occupies a single slot in the chassis and can be installed in any available slot position.
• Cable Routing: Keep Ethernet communication cables segregated from high-voltage power lines to reduce EMI/RFI interference.
• Environmental Maintenance: Regularly inspect the conformal coating and enclosure to ensure the integrity of the protective layer in highly corrosive settings.

FAQ

Q: Does the 1756-EN2TRK support redundant network rings?
A: Yes, this module supports Device Level Ring (DLR) technology, allowing it to function as a supervisor or ring node to provide fault-tolerant communication loops.

Q: Can this module be used in standard, non-corrosive environments?
A: Yes, while it is specifically designed with conformal coating for harsh environments, it is fully compatible with any standard ControlLogix application.

Q: Is an external managed switch required for my network?
A: No, the dual-port design allows for linear and DLR topologies without the necessity of external managed switches, simplifying your network architecture.