Allen-Bradley 1756-L81E CPU Module
Allen-Bradley 1756-L81E CPU Module

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Allen-Bradley

Allen-Bradley 1756-L81E CPU Module

SKU: 1756-L81E
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$2,998.99
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Allen-Bradley 1756-L81E ControlLogix 5580 Controller, 3MB User Memory

The Allen-Bradley 1756-L81E is a ControlLogix 5580 controller from Rockwell Automation Logix5000 platform. It features 3 MB user memory, one integrated Gigabit EtherNet/IP port, local USB programming port, and a 4-character alpha/numeric front display. Supports up to 100 EtherNet/IP devices and maximum 128,000 I/O points for large-scale discrete, motion and process control applications. 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-L81E
  • Product Family: ControlLogix 5580 / Logix5000 Controller
  • User Memory: 3 MB
  • Embedded Communication: 1 x Gigabit EtherNet/IP port
  • Local Port: USB programming port
  • Front Display: 4-character alpha/numeric LED display
  • Max EtherNet/IP Devices: 100
  • Maximum I/O Points: 128,000 total I/O
  • Max Analog I/O: 4,000
  • Tasks Support: 32 tasks (continuous, periodic, event tasks)
  • Non-Volatile Storage: SD card compatible (1784-SD1 / 1784-SD2)
  • Power Dissipation: 6.2 W
  • Lifecycle: Active production
  • Typical Use: Factory automation, motion control, process control, assembly lines

Specifications

Official Rockwell Automation ControlLogix 5580 Data

Technical Specifications
Catalog Number 1756-L81E
Series ControlLogix 5580
User Memory 3 MB
Integrated Network 1 x Gigabit EtherNet/IP
Local Programming Port USB
Max Total I/O 128,000 points
Max Analog I/O 4,000 points
Power Dissipation 6.2 W (21.2 BTU/h)
Front Display 4-character alpha/numeric
Compatible SD Card 1784-SD1, 1784-SD2
Agency Certifications
Certifications cULus, CE, C-Tick
Model note: 1756-L81E is standard ControlLogix 5580 controller, 3MB user memory. Variants: 1756-L81EK (coated), 1756-L81EXT (extreme environment coated), 1756-L81E-NSE (No Stored Energy). Compare memory size: L81E=3MB, L82E=5MB, L83E=10MB, L84E=20MB, L85E=40MB.

Compatibility & Cross-References

1756-L81E works with ControlLogix 1756 chassis, 1756 power supplies, 1756 digital/analog I/O modules and communication modules. Programming software: Studio5000 Logix Designer. Supports motion, safety and process control when paired with matching I/O modules. This listing is provided by an independent industrial automation distributor; brand names and part numbers are used for product identification only.

Applications

  • Discrete factory automation and assembly lines
  • Multi-axis motion control systems
  • Packaging, material handling and conveyor systems
  • Process control, plant-wide Logix5000 architecture
  • Upgrade or spare replacement for existing ControlLogix 5580 systems

Warranty

  • Availability: Active production, new & 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.

Independent supplier: Allen-Bradley part 1756-L81E is supplied by SHLY-PLC, an independent industrial automation distributor. Brand names and part numbers are used for product identification and remain the property of their respective owners; this listing is not affiliated with, sponsored or endorsed by the manufacturer.

Frequently Asked Questions

Q: What is Allen-Bradley 1756-L81E?

A: ControlLogix 5580 Logix5000 PLC controller with 3MB user memory, built-in Gigabit EtherNet/IP and USB programming port.

Q: What is the memory size and max I/O?

A: 3 MB user memory, supports up to 128,000 total I/O points and 4,000 analog I/O points.

Q: What software programs 1756-L81E?

A: Studio5000 Logix Designer software.

Q: What are the main variants of L81E?

A: 1756-L81EK (conformal coated), 1756-L81EXT (extreme environment), 1756-L81E-NSE (No Stored Energy).

1756-L81E · Technical reference data · Independently supplied by SHLY-PLC

Standard International (tracked courier): delivered in 5–8 business days. In-stock items are processed within 2–4 business days. USD 25 flat rate on orders of $500 or less; free on orders over $500.

Express (DHL Express / FedEx International): upgraded expedited delivery in 2–4 business days. The Express surcharge is calculated at checkout based on destination and order weight.

Non-Stock / On-Order items ship on request: dispatch time is confirmed before your order — see our Shipping Policy. Remote-area and overweight surcharges, where applicable, are shown before checkout.

Every product is covered by a 12-month seller warranty provided by SHLY-PLC, effective from the date of delivery, against defects in materials and workmanship under normal use. Manufacturer or factory warranty service is not applicable, and extended warranty packages are not provided.

This warranty does not cover damage from misuse, improper installation, power surges, neglect, unauthorized repair, or normal wear and tear. See our Return Policy for warranty-claim instructions.
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