Allen-Bradley 1756-L81EXT PLC Controller

Allen-Bradley 1756-L81EXT ControlLogix 5580 XT Extreme Environment Controller, 3MB User Memory, Conformal Coated

The Allen-Bradley 1756-L81EXT is ControlLogix 5580 XT extreme environment general-purpose controller with conformal coating, designed for harsh industrial environments with wide temperature range, humidity, dust and corrosive contaminants. It features 3 MB user memory, integrated 1Gigabit EtherNet/IP port, local USB 2.0 programming port, 4-character alpha/numeric front LED display. It supports up to 100 EtherNet/IP devices and total 128,000 I/O points, maximum 256 motion axes. Lifecycle: Active, it serves as direct replacement for EOL model 1756-L81EK. Technical data sourced from official Rockwell Automation ControlLogix 5580 datasheet. Supplied by SHLY-PLC, an independent industrial automation distributor; each unit undergoes visual inspection and functional testing before shipment. Contact our team for compatibility verification.

Features

• Catalog Number: 1756-L81EXT
• Product Family: ControlLogix 5580 XT Extreme Environment Controller, Logix5000 Platform
• User Memory: 3 MB
• Conformal Coating: Yes, protected against dust, humidity & corrosive gas
• Operating Temperature: -25°C to +70°C (XT wide temperature range)
• Embedded Communication: 1 x Gigabit EtherNet/IP port (10/100/1000Mbps)
• Local Port: USB 2.0 full-speed programming port Type B
• Front Display: 4-character alpha/numeric LED display
• Max EtherNet/IP Devices: 100
• Maximum Total I/O Points: 128,000
• Motion Axis Support: Up to 256 motion axes
• Non-Volatile Storage: Compatible with SD card (1784-SD1 / 1784-SD2)
• Power Dissipation: 6.2 W (21.2 BTU/h)
• Lifecycle: Active, direct replacement for discontinued 1756-L81EK
• Typical Use: Factory automation in harsh cabinets with wide temperature fluctuations, dust, moisture or mild corrosive vapors

Specifications

Official Rockwell Automation ControlLogix 5580 XT Data

Compatibility & Cross-References

1756-L81EXT works with standard ControlLogix 1756 chassis, 1756 power supplies, standard 1756 I/O modules. Supports motion control over EtherNet/IP. This listing is provided by an independent industrial automation distributor; brand names and part numbers are used for product identification only.

Applications

• Automation cabinets with wide temperature swings, high humidity, dust and mild corrosive fumes
• EtherNet/IP multi-axis motion control up to 256 axes
• Outdoor sheltered industrial automation, heavy machinery, material handling
• Drop-in spare replacement for 1756-L81EK systems

Warranty

• Availability: Active model, in stock available; contact us for real-time stock status.
• Inspection & testing: each unit is visually inspected and functionally checked before packing.
• Delivery: orders are processed within 2-4 business days after payment confirmation; standard worldwide delivery is about 5-8 business days, express shipping available, orders over $500 ship free.

Warranty: 12-month seller warranty provided by SHLY-PLC. See our Return Policy for coverage and claims.

Frequently Asked Questions

Q: What is Allen-Bradley 1756-L81EXT?

A: ControlLogix 5580 XT harsh environment PLC,3MB memory,conformal coating,-25~70°C wide temp,max 100 EtherNet/IP devices,active product,direct replacement for 1756-L81EK.

Q: What is difference between L81EK and L81EXT?

A: 1756-L81EK: coated,0~60°C,max 60 EtherNet/IP devices,EOL. 1756-L81EXT: coated XT,-25~70°C,max 100 EtherNet/IP devices,active,drop-in replacement.

Q: What software programs this controller?

A: Studio5000 Logix Designer version 33.04 or newer.

Q: Is 1756-L81EXT safety or process controller?

A: No. It is standard general-purpose ControlLogix XT controller, not GuardLogix safety and not PlantPAx process controller.

1756-L81EXT · Technical reference data · Independently supplied by SHLY-PLC