Description
The Allen-Bradley 1756-EN2TXT is a high-performance ControlLogix EtherNet/IP communication module specifically engineered for use in extreme environments. The “XT” designation signifies that this module is part of the “Extended Temperature” line, designed to operate in harsher conditions than standard industrial hardware.
Product Parameters (Datasheet)
- Model Number: 1756-EN2TXT
- Communication Rate: 10/100 Mbps
- EtherNet/IP Connections: 256 (TCP) / 128 (CIP)
- Packet Rate Capacity: 25,000 packets per second (I/O)
- Operating Temperature: -25°C to +70°C (-13°F to +158°F)
- Storage Temperature: -40°C to +85°C (-40°F to +185°F)
- Backplane Current: 1.0A @ 5.1V DC; 3mA @ 24V DC
- Power Dissipation: 5.1 Watts
- Network Support: EtherNet/IP, Bridge, Messaging, I/O control, Multicast, Unicast
- Conformal Coating: Standard on XT modules for protection against moisture and contaminants
Allen Bradley 1756-EN2TXT
Allen Bradley 1756-EN2TXT
Allen Bradley 1756-EN2TXT
Country of Origin
This module was engineered and manufactured in the United States by Rockwell Automation.
Application Fields
The 1756-EN2TXT is utilized in mission-critical applications where standard-grade electronics might fail:
- Oil & Gas (Upstream): Remote wellhead control and offshore platforms with wide temperature swings.
- Mining: Underground and surface operations in desert or arctic climates.
- Heavy Infrastructure: Traffic control and tunnel ventilation systems exposed to unconditioned air.
- Water/Wastewater: Outdoor pumping stations and treatment facilities.
- Renewable Energy: Control cabinets for wind turbines and solar arrays.
Product Usage Instructions
- Chassis Slot: Install the module into any available slot in a 1756-A7XT or other XT-rated ControlLogix chassis to maintain the extended temperature specification for the entire system.
- Network Setup: Use a standard Cat5e or Cat6 RJ45 cable. For XT environments, ensure the cabling and connectors are also rated for high/low temperature extremes.
- IP Configuration: Assign the IP address via the Rotary Switches on the module (for 192.168.1.xxx series) or use the BOOTP/DHCP utility for dynamic or specific addressing.
- Firmware Management: Use ControlFlash or ControlFlash Plus to ensure the module’s firmware is compatible with your Studio 5000 Logix Designer project version.
- Status Monitoring: Monitor the front-panel scrolling display for real-time diagnostics, IP address verification, and fault codes.
Product Technical Description
Technically, the 1756-EN2TXT serves as a high-speed communication bridge. It enables the ControlLogix processor to control remote I/O, communicate with other PLCs, and interface with HMI/SCADA systems over an EtherNet/IP network. The XT hardware is built with specialized components and a ruggedized PCB layout that minimizes thermal stress. The inclusion of conformal coating provides an extra layer of defense against corrosive gases and humidity, which is common in chemical plants or coastal industrial sites.
Q&A (Common Questions)
Q: Is the 1756-EN2TXT functionally different from the standard 1756-EN2T? A: Functionally and logically, they are identical. The primary difference is the physical hardening and the extended operating temperature range.
Q: Can I use this module in a standard (non-XT) chassis? A: Yes, it will function normally. However, the system’s overall temperature rating will be limited by the lowest-rated component in the chassis (usually the standard power supply or chassis itself).
Q: Does it support Redundancy? A: Yes, the 1756-EN2TXT can be used in ControlLogix Redundancy systems (version 19.50 or later) to provide a high-availability communication path.
Q: What does the “T” at the end of “TXT” stand for? A: In Allen-Bradley nomenclature, “XT” stands for Extended Temperature, and the additional “T” often refers to the inclusion of conformal coating.
Similar Model Recommendations
- 1756-EN2T: Standard temperature version (0°C to +60°C).
- 1756-EN3TRXT: Extended temperature version with dual ports for DLR (Device Level Ring) support.
- 1756-L73XT: Matching extended temperature ControlLogix L7 series processor.
- 1756-A7XT: 7-slot extended temperature chassis.
- 1756-EN4TR: Next-generation high-capacity EtherNet/IP module.
For more information on the Allen-Bradley 1756-EN2TXT and other Logix5000 XT components, please contact our support team.
