Allen-Bradley 1756-L81EP PLC Controller

Allen-Bradley 1756-L81EP ControlLogix 5580 Process Controller, 3MB User Memory, PlantPAx

The Allen-Bradley 1756-L81EP is ControlLogix 5580E standard process controller built on Rockwell Logix5000 PlantPAx platform, without 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. Optimized with native PlantPAx process instruction set and dedicated process tasking model, supporting up to 100 EtherNet/IP devices and total 128,000 I/O points for standard indoor process automation environments. Lifecycle: End of Life, discontinuation date Dec 31,2026, direct replacement is 1756-L81EPXT. 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-L81EP
• Product Family: ControlLogix 5580 Process Controller, Logix5000 / PlantPAx Platform
• User Memory: 3 MB
• Conformal Coating: No
• Operating Temperature: 0°C to +60°C
• Embedded Communication: 1 x Gigabit EtherNet/IP port
• Local Port: USB 2.0 full-speed programming port (temporary local use only)
• Front Display: 4-character alpha/numeric LED display
• Max EtherNet/IP Devices: 100
• Maximum Total I/O Points: 128,000
• Task Structure: 32 tasks optimized for PlantPAx process control (1 continuous + periodic / event tasks)
• 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-L81EPXT
• Typical Use: PlantPAx process control for standard indoor industrial process sites

Specifications

Official Rockwell Automation ControlLogix 5580 Process Data

Compatibility & Cross-References

1756-L81EP works with standard ControlLogix 1756 chassis, 1756 power supplies, standard 1756 I/O modules. Optimized for PlantPAx distributed process 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

• PlantPAx distributed process control in oil & gas, chemical, water / wastewater plants (indoor clean cabinet)
• Batch control, PID, analog loop control for standard indoor manufacturing environments
• Food & beverage, life science process automation
• Spare replacement for legacy PlantPAx 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-L81EP?

A: ControlLogix 5580 PlantPAx process controller, 3MB memory, no conformal coating, 0~60°C operating temperature, EOL, direct replacement 1756-L81EPXT.

Q: What is difference between L81EP and L81EPXT?

A: 1756-L81EP: uncoated, 0~60°C. 1756-L81EPXT: conformal coated, wide temperature -25~70°C XT version.

Q: What software supports this controller?

A: Studio5000 Logix Designer version 33.04 or newer with PlantPAx library.

Q: Is 1756-L81EP a safety controller?

A: No, it is standard PlantPAx process controller. For safety logic, use GuardLogix safety models such as 1756-L81ES / L81ESK / L81ESXT.

1756-L81EP · Technical reference data · Independently supplied by SHLY-PLC