Allen-Bradley 1756-L81EXT Controller – Extreme Temperature ControlLogix-XT with 3MB Memory
Built for Harsh Industrial Environments
The 1756-L81EXT survives where others fail. Special coating protects against corrosive chemicals and extreme temperatures from -25°C to 70°C. Perfect for oil/gas, mining, and heavy manufacturing.
Key Benefits
- 3MB user memory for complex automation
- Works in freezing cold to desert heat
- Built-in USB and Ethernet ports
- Supports 32 simultaneous tasks
- Compatible with Flex I/O-XT series
Technical Details
- Model: 1756-L81EXT (ControlLogix-XT Series)
- Memory: 3MB user memory
- Temperature Range: -25°C to 70°C (standalone)
- With Flex I/O-XT: -20°C to 70°C
- Power: 1.2A @5.1V DC / 5mA @1.2V DC
- Heat Output: 21.2 BTU/hour
- Programming: Ladder Logic, Structured Text
- Networks: EtherNet/IP, DeviceNet, ControlNet
Reliability Guaranteed
12-month product warranty. Ships worldwide via FedEx, UPS, or DHL.
Common Questions
- What does the “XT” designation mean?
Extra Tough – designed for extreme environments. - Can I use this in explosive atmospheres?
No, it’s not explosion-proof rated. - How does the coating help?
Protects against dust, moisture and chemical splashes. - What chassis is recommended?
Use K-version chassis for best results. - Is programming different from standard models?
No, uses same Studio 5000 software.
Learn More
- Download the complete ControlLogix specifications guide
- Contact our automation specialists for application support






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