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Allen-Bradley 1756-L81E

Allen-Bradley 1756-L81E Plc

Allen-Bradley 1756-L81E

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Eligible for Next Day Delivery All Parts Come with 24 Month Warranty New, Refurbished and Repairs Available

We can ship via UPS, FedEx, and USPS. We can ship on customers' accounts as well. International delivery available via UPS and DHL. In stock items typically ship same day.

All products (new, refurbished, and repairs) are covered by the Industrial Automation Company's 2 Year Warranty. Manufacturer's Warranty does not apply.

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Allen-Bradley 1756-L81E

To meet the requirements of contemporary industrial automation and control systems, Allen-Bradley has developed the 1756-L81E, a high-performance ControlLogix 5570 Controller. As an integral part of the ControlLogix family, this controller is distinguished by its versatile features and reliable performance, rendering it exceptionally suitable for a wide range of applications.

Technical Parameters:

The 1756-L81E is well-suited for use in harsh industrial settings because of its many remarkable technical qualities. Its 3 MB of user memory is particularly noteworthy since it enables the storage and execution of sophisticated control programs. Along with this, there is a USB 2.0 port that can transport data at a speed of 12 Mbps.

Its integrated 1GB Ethernet connector is another noteworthy feature that allows for effective network integration and high-speed communications. This controller can manage many networked components, as it can handle up to 60 EtherNet/IP devices.

The 1756-L81E can manage a maximum of 4,000 analog I/O points and 128,000 digital I/O points, making it ideal for applications with numerous inputs and outputs. Applications involving substantial data collecting and control, such as those in the processing and manufacturing sectors, are well-suited to its high I/O capacity.

Thanks to its optimized operating parameters, the 1756-L81E is built to work reliably in a wide range of environments. Its 32-task support and 1,000-program per-task limit can accommodate complex industrial processes.

In addition to basic diagnostic features built right into the device, the controller comes with a 4-character alpha/numeric display. To top it all off, the 1756-L81E has a 2GB Secure Digital Card (1784-SD2) already installed.

Ambient Operating Parameters:

Reliably operating in a wide range of environmental conditions is the design goal of the Allen-Bradley 1756-L81E ControlLogix 5570 Controller. Serving a diverse range of industrial applications, it functions efficiently in temperatures ranging from 0°C to 60°C (32°F to 140°F). In addition to being temperature-flexible, it can also operate reliably in humid situations with relative humidity levels between 5 and 95 percent without condensation.

The IEC 61000-6-4 emission rating, together with the controller's compliance with CSA and c-UL-us certifications, further demonstrate its resilience. It can resist shocks up to 30G and vibrations up to 2G over 10-500Hz, proving that it is designed to endure substantial physical stress.


There are a number of industrial uses for the Allen-Bradley 1756-L81E. Complex automation activities in manufacturing, process control, and other industrial applications are well-suited to its high-speed processing, vast memory, and powerful I/O capacity. Its networking features make it a flexible solution for many industrial environments since it can be easily linked to bigger systems.

Frequently Asked Questions:

What is the Allen-Bradley 1756-L81E's approach to networking and communication?

The 1756-L81E has a 1GB Ethernet connector and other built-in connectivity features. Because of this, connecting to other systems and devices is quick and dependable. It allows for effectively managing networks and data interchange in industrial control systems, and it supports as many as 60 EtherNet/IP nodes.

How does the 1756-L81E manage input and output (I/O) points?

The 1756-L81E can manage up to 4,000 analog I/O points and 128,000 digital I/O points, making it highly capable for applications with extensive I/O requirements. This high I/O capacity is ideal for substantial data collection and control in the processing and manufacturing sectors.

What memory and program support does the 1756-L81E offer for complex industrial processes?

The 1756-L81E comes with 3 MB of user memory, which supports the storage and execution of sophisticated control programs. Additionally, it supports 32 tasks and up to 1,000 programs per task, accommodating complex industrial processes.

Product Specification Table

Attributes Specification
Series ControlLogix 5580
User Memory 3MB
Communication Ports 1 x USB 2.0 Port, 1 x RJ-45 10/100/1000 Mbps Ethernet Port
EtherNet/IP Nodes Supported, max 60
Digital I/O, max 128000
Analog I/O, max 4000
Secure Digital Card 2GB (1784-SD2), ships pre-installed in the controller
Certifications Eurasian Economic Community, Australian RCM, China CCC, ATEX, CE
Temperature Range 0°C to 60°C (32°F to 140°F)
Vibration Resistance 2G over 10 - 500 Hz

Buying Options
Buying Options

All products are covered by Industrial Automation Co.'s 2-Year Warranty.

Condition SKU Price Warranty Availability Quantity Purchase
Surplus Original Box 1756-L81E-FS $4,541.00 USD 2 Year Extended Warranty 1 In Stock in US!
Quick Repairs and Great Service

Send in your item for a free evaluation and repair quote. Use our RMA form or email a repair request to service@iac.us.com , and we will contact you to assess your situation and offer shipping information.

All products (new, refurbished, and repairs) are covered by the Industrial Automation Company's 2 Year Warranty. Manufacturer's Warranty does not apply.



The Allen-Bradley 1756-L81E ControlLogix controller is a cutting-edge solution for your industrial automation needs, offering robust performance and versatility. With a focus on reliability and efficiency, the 1756-L81E provides powerful control capabilities, making it suitable for a wide range of applications. Its design enables seamless integration and scalability within your existing infrastructure, ensuring a future-proof solution for complex control systems.

1756-L81E Technical Specifications

This high-performance controller features 3 MB of user memory and a responsive 4-character alpha/numeric display for easy monitoring. It is equipped with a USB port for straightforward programming and data transfer, alongside a 1GB Ethernet port supporting up to 100 Ethernet/IP devices. This combination of features ensures streamlined operation and connectivity, facilitating efficient management of networked devices.

Environmental Conditions for Operation and Installation

Optimized for durability, the 1756-L81E is designed to perform reliably in a variety of industrial environments. Its robust construction ensures sustained operation even in demanding conditions. For detailed environmental specifications and installation guidelines, referring to the official documentation is recommended to ensure optimal performance and safety.

Components and Configuration

The 1756-L81E controller offers a comprehensive suite of features for advanced system management. Its modular design allows for easy expansion to meet changing operational needs. Users can benefit from the extensive range of compatible modules and accessories provided by Allen-Bradley to enhance functionality and performance further.

Advanced Safety Measures

Allen-Bradley's commitment to safety is evident in the 1756-L81E, which incorporates several advanced protective measures to ensure secure operation. These features are designed to minimize risks and enhance reliability, providing peace of mind for both operators and managers. Detailed information on these safety features can be found in the controller's user manual.

Contact Us Now

Explore the benefits of the Allen-Bradley 1756-L81E for your industrial automation requirements. Contact Industrial Automation Co. today to request a quote and elevate your control systems with this high-performance controller.