Allen-Bradley 1756-L81EK PLC Controller

Allen-Bradley 1756-L81EK ControlLogix 5580 Controller, 3MB User Memory, Conformal Coated

The Allen-Bradley 1756-L81EK is ControlLogix 5580 standard controller under Rockwell Logix5000 platform with conformal coating. 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 60 EtherNet/IP devices and total 128,000 I/O points, designed for industrial environments with humidity, dust and mild corrosive contaminants. Lifecycle: End of Life, discontinuation date Dec 31,2026, direct replacement is 1756-L81EXT. 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-L81EK
• Product Family: ControlLogix 5580 Standard Controller, Logix5000 Platform
• User Memory: 3 MB
• Conformal Coating: Yes, protected against dust, humidity & corrosive gas
• Operating Temperature: 0°C to +60°C (Standard non-XT temperature range)
• Embedded Communication: 1 x Gigabit EtherNet/IP port
• Local Port: USB 2.0 full-speed programming port
• Front Display: 4-character alpha/numeric LED display
• Max EtherNet/IP Devices: 60
• 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
• Lifecycle: End of Life, discontinued Dec 31, 2026; direct replacement:1756-L81EXT
• Typical Use: General factory automation for indoor industrial environments requiring coated PCB protection

Specifications

Official Rockwell Automation ControlLogix 5580 Data

Compatibility & Cross-References

1756-L81EK 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

• General discrete automation in factory cabinets with humidity, dust or mild corrosive vapors
• EtherNet/IP multi-axis motion control up to 256 axes
• Material handling, packaging, metalworking machine control
• Spare replacement for existing coated ControlLogix 5580 systems

Warranty

• Availability: EOL model, limited surplus 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-L81EK?

A: ControlLogix 5580 general-purpose PLC,3MB memory,conformal coating,0~60°C,max 60 EtherNet/IP devices,EOL,direct replacement 1756-L81EXT.

Q: What is difference between L81E, L81EK and L81EXT?

A: 1756-L81E: uncoated,0~60°C,100 EtherNet/IP devices; 1756-L81EK: conformal coated,0~60°C,60 EtherNet/IP devices; 1756-L81EXT: conformal coated,wide temperature -25~70°C XT version.

Q: What software programs this controller?

A: Studio5000 Logix Designer version 33.04 or newer.

Q: Is 1756-L81EK safety or process controller?

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

1756-L81EK · Technical reference data · Independently supplied by SHLY-PLC