1756-L81E | Allen-Bradley ControlLogix Logix5580 Processor, 3MB, EtherNet/USB
1756-L81E | Allen-Bradley ControlLogix Logix5580 Processor, 3MB, EtherNet/USB
1756-L81E | Allen-Bradley ControlLogix Logix5580 Processor, 3MB, EtherNet/USB
    1756-L81E | Allen-Bradley ControlLogix Logix5580 Processor, 3MB, EtherNet/USB
1756-L81E | Allen-Bradley ControlLogix Logix5580 Processor, 3MB, EtherNet/USB

1756-L81E | Allen-Bradley ControlLogix Logix5580 Processor, 3MB, EtherNet/USB

Part #: 1756-L81E Manufactured by: Allen-Bradley
Regular price
$3,687.00
Sale price
$3,687.00
Regular price
39 in Stock
Condition: New – Open box
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Product Overview
The Allen-Bradley 1756-L81E provides high-performance control within the ControlLogix 5580 family, combining robust memory...  Read more
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Warranty for Product #: 1756-L81E
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Original Manufacturer's Warranty Not Covered, This Product is SURPLUS.

Product Description P/N: 1756-L81E

Description / Specifications

Description 

The Allen-Bradley 1756-L81E is a ControlLogix 5580 controller designed to manage high-performance automation systems with advanced processing capabilities. It provides 3 MB of memory, supports up to 60 EtherNet/IP devices, and delivers reliable control for large-scale industrial applications.

 

 

Technical Specifications 

Condition New/Never Used Surplus
Brand Allen-Bradley
Category Controllers
Part Number 1756-L81E
Subcategory ControlLogix Controllers
Controller Family ControlLogix 5580
Memory 3 MB
Communication Embedded EtherNet/IP
Supported Devices Up to 60 EtherNet/IP devices
Display Type 4-Character Alphanumeric
Mounting Type Chassis
Operating Temperature Up to 140 °F
Power Requirements 5 mA @ 1.2 VDC, 1.20 A @ 5.1 VDC
Certifications CE, CSA, CUL, KC, Marine, NRTL, RCM, UL
Enclosure Open-Style
Application High-Performance Industrial Control
Weight 1.2 lb

  

 

Information About 1756-L81E

The 1756-L81E is part of the ControlLogix 5580 family, offering enhanced processing speed, built-in security features, and expanded communication capabilities for demanding automation architectures. It includes an embedded EtherNet/IP interface capable of managing up to 60 devices while supporting high-speed data exchange for motion, safety, and standard control. The module is designed for chassis installation and operates with a power requirement of 5 mA at 1.2 VDC and 1.20 A at 5.1 VDC, meeting global certifications including CE, UL, CSA, KC, Marine, NRTL, and RCM. Equipped with a 4-character alphanumeric display for diagnostics, it functions reliably in industrial environments up to 140 °F and integrates seamlessly with ControlLogix backplanes for scalable system expansion.

Key Features:

  • High-Performance Processor: Provides advanced computational capability for large automation tasks.
  • Integrated Ethernet Port: Supports up to 60 EtherNet/IP devices for extensive networked control.
  • Large Onboard Memory: Offers 3 MB of memory for complex automation programs.
  • Alphanumeric Display: Features a built-in 4-character display for module status and diagnostics.
  • Global Certification Compliance: Meets CE, UL, CSA, KC, Marine, NRTL, and RCM requirements.
  • Efficient Power Usage: Operates on 5 mA at 1.2 VDC and 1.20 A at 5.1 VDC for stable performance.
  • Industrial Temperature Rating: Designed to operate reliably up to 140 °F.
  • Chassis-Based Installation: Integrates directly into ControlLogix chassis systems.

The 1756-L81E delivers the reliability and precision required for advanced control, communication, and system coordination in industrial automation environments.

Frequently Asked Questions about 1756-L81E
Question: What is the main purpose of the 1756-L81E controller?
Date Update:30/05/2025
Answer:

The 1756-L81E is a high-performance ControlLogix controller used for large-scale industrial automation tasks. It serves as the central processing unit in systems that require high-speed logic execution and flexible communication. Its advanced processing capabilities make it suitable for complex control applications, including those with safety and motion integration.

Question: What are the physical dimensions of the 1756-L81E module?
Date Update:30/05/2025
Answer:

The 1756-L81E has a standard ControlLogix single-slot width, fitting into a chassis without requiring additional space. While precise millimeter dimensions are not always provided, it typically measures approximately 142 x 35 x 132 mm (H x W x D). Its compact form allows for dense installation in control cabinets.

Question: Which communication protocols are supported by the 1756-L81E?
Date Update:30/05/2025
Answer:

The 1756-L81E supports Ethernet/IP communication natively via its embedded port. It can also interface with other networks like DeviceNet, ControlNet, and third-party protocols using communication modules. This makes it highly adaptable to various industrial systems.

Question: What is the maximum number of I/O points it can handle?
Date Update:30/05/2025
Answer:

The 1756-L81E supports up to 128,000 digital I/O and 4,000 analog I/O points. This makes it suitable for large-scale control systems with numerous devices. The actual usable count depends on the application design and processor load.

Question: Is the 1756-L81E still in production?
Date Update:30/05/2025
Answer:

Yes, the 1756-L81E is an active product and continues to be manufactured by Rockwell Automation. It belongs to the modern 5580 family of ControlLogix controllers, which are currently supported and recommended for new applications. This ensures availability of firmware updates and technical support.

IQElectro is not an authorized distributor.
IQElectro LLC (IQElectro) is NOT an Authorized Distributor or in any way affiliated with Rockwell Automation, Siemens, or any other Manufacturers. IQElectro is NOT an Authorized Dealer of this product. The product may be of older version, date codes, or design than that available from authorized dealers. As IQElectro is not an authorized dealer of this product, the Original Manufacturer's Warranty and Support DO NOT apply. IQElectro sells SURPLUS only and DOES NOT SELL SOFTWARE or FIRMWARE licenses For more detailed information, please refer to the full version of our disclaimer policy Disclaimer Policy.
Description / Specifications

Description 

The Allen-Bradley 1756-L81E is a ControlLogix 5580 controller designed to manage high-performance automation systems with advanced processing capabilities. It provides 3 MB of memory, supports up to 60 EtherNet/IP devices, and delivers reliable control for large-scale industrial applications.

 

 

Technical Specifications 

Condition New/Never Used Surplus
Brand Allen-Bradley
Category Controllers
Part Number 1756-L81E
Subcategory ControlLogix Controllers
Controller Family ControlLogix 5580
Memory 3 MB
Communication Embedded EtherNet/IP
Supported Devices Up to 60 EtherNet/IP devices
Display Type 4-Character Alphanumeric
Mounting Type Chassis
Operating Temperature Up to 140 °F
Power Requirements 5 mA @ 1.2 VDC, 1.20 A @ 5.1 VDC
Certifications CE, CSA, CUL, KC, Marine, NRTL, RCM, UL
Enclosure Open-Style
Application High-Performance Industrial Control
Weight 1.2 lb

  

 

Information About 1756-L81E

The 1756-L81E is part of the ControlLogix 5580 family, offering enhanced processing speed, built-in security features, and expanded communication capabilities for demanding automation architectures. It includes an embedded EtherNet/IP interface capable of managing up to 60 devices while supporting high-speed data exchange for motion, safety, and standard control. The module is designed for chassis installation and operates with a power requirement of 5 mA at 1.2 VDC and 1.20 A at 5.1 VDC, meeting global certifications including CE, UL, CSA, KC, Marine, NRTL, and RCM. Equipped with a 4-character alphanumeric display for diagnostics, it functions reliably in industrial environments up to 140 °F and integrates seamlessly with ControlLogix backplanes for scalable system expansion.

Key Features:

  • High-Performance Processor: Provides advanced computational capability for large automation tasks.
  • Integrated Ethernet Port: Supports up to 60 EtherNet/IP devices for extensive networked control.
  • Large Onboard Memory: Offers 3 MB of memory for complex automation programs.
  • Alphanumeric Display: Features a built-in 4-character display for module status and diagnostics.
  • Global Certification Compliance: Meets CE, UL, CSA, KC, Marine, NRTL, and RCM requirements.
  • Efficient Power Usage: Operates on 5 mA at 1.2 VDC and 1.20 A at 5.1 VDC for stable performance.
  • Industrial Temperature Rating: Designed to operate reliably up to 140 °F.
  • Chassis-Based Installation: Integrates directly into ControlLogix chassis systems.

The 1756-L81E delivers the reliability and precision required for advanced control, communication, and system coordination in industrial automation environments.

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