1756-EN2TXT Rockwell Automation Logix XT Ethernet Communication Module

1756-EN2TXT Allen-Bradley ControlLogix XT EtherNet/IP Bridge Architecture

Designed specifically for extreme operating conditions, the 1756-EN2TXT is a high-performance EtherNet/IP communication bridge with an embedded switch from the Allen-Bradley ControlLogix-XT (Extreme Environment) series by Rockwell Automation. Built to withstand corrosive elements and wide temperature swings from -25°C to 70°C, this single-slot module bridges real-time I/O messaging and message exchanges across plant networks while supporting 256 Logix communication connections and 128 TCP/IP communication connections at 10/100 Mbps data rates.

Detailed Technical Specifications & Network Metrics

Global PLC Spare HUB's Insight & Field Experience

When deploying extreme-environment communication modules like the 1756-EN2TXT in harsh outdoor or corrosive industrial facilities, Global PLC Spare HUB field engineers recommend pairing the module with dedicated XT backplanes such as the 1756-A7XT to ensure consistent thermal dissipation and vibration dampening. Furthermore, when configuring CIP motion axes or high-frequency I/O scanning, verify that switch buffer settings and network QoS parameters are optimized to prevent packet drops during peak traffic loads.

Chassis Integration & Environmental Hardening Guidelines

• Extreme Temperature Range: Certified for reliable operation in harsh ambient temperatures spanning -25°C to 70°C (-13°F to 158°F).
• Universal Slot Placement: Can be installed into any available slot within a compatible ControlLogix chassis backplane.
• Auxiliary Programming Port: Features an onboard USB 1.1 full-speed (12 Mbps) interface for direct controller configuration and diagnostics.

Advanced Diagnostics & Network Fault Detection Capabilities

• Embedded Switch Diagnostics: Front-panel status LEDs provide real-time link activity, network collisions, and module health visualization.
• SNMP Protocol Support: Enables secure network management and remote asset monitoring using password-protected Simple Network Management Protocol.
• Socket Services Integration: Supports custom socket messaging for seamless third-party device integration and data exchange over standard Ethernet.

Target Equipment & Typical Industrial Application Scenarios

• Outdoor Oil & Gas Refineries: Managing SCADA and distributed I/O communications in unconditioned, weather-exposed junction enclosures.
• Wastewater Treatment Plants: Linking remote pumping stations and filtration skids subjected to high humidity and corrosive ambient gases.
• Heavy Metal Processing Mills: Handling high-speed motion and data collection in high-vibration, elevated temperature plant zones.

Global Logistics, Warranty & Procurement Guidelines

• Express Freight Carriers: Expedited global shipping dispatched securely via FedEx, UPS, and DHL.
• Fulfillment Speed: Orders are processed, thoroughly tested, and shipped out within 24 to 48 hours.
• Quality Assurance Guarantee: Supported by a comprehensive 12-month warranty covering electronic and mechanical defects.

Frequently Asked Questions

Q: What is the main operational difference between standard EN2T modules and the 1756-EN2TXT version?

A: The 1756-EN2TXT is part of the ControlLogix-XT (Extreme Environment) line, built with conformal coating and ruggedized hardware to handle wider temperature extremes (-25°C to 70°C) and corrosive atmospheres.

Q: How does pairing this bridge with an L7x series controller affect network performance?

A: Utilizing the bridge alongside a 1756-L7x controller boosts the maximum I/O packet rate capacity from 10,000 packets per second up to 25,000 packets per second.

Q: Can this module be installed in standard non-XT ControlLogix chassis backplanes?

A: Yes, it is backward compatible with standard 1756 chassis, though utilizing an XT chassis is recommended for harsh thermal and corrosive installations.

Q: What troubleshooting steps should be taken if TCP/IP connection limits are reached?

A: Review active HMI, SCADA, and third-party socket connections to ensure orphaned sessions are properly closed, or reallocate connection paths within your Studio 5000 project configuration.

Q: Purchasing Guidance: How do I verify if my application requires the XT-rated communication bridge?

A: Assess your enclosure's internal temperature and environmental exposure; if ambient operating temperatures exceed standard 0°C to 60°C limits or involve corrosive gases, the 1756-EN2TXT is required.

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