What is the 1756-L81E?

It is a ControlLogix 5580 controller with 3 MB of user memory, a built-in 1-gigabit (Gb) Ethernet port, and a USB port. It is designed for high-performance applications in the ControlLogix chassis.

How many Ethernet/IP nodes does the 1756-L81E support?

It supports up to 60 nodes with Firmware Version 29, and up to 100 nodes with Firmware Version 30 or later.

Does the 1756-L81E require a battery?

No, 1756-L8 series controllers use a built-in energy storage module rather than a battery to maintain memory during power loss.

Is this product brand new?

Yes, AB 1756-L81E is brand new, original, unused, and factory sealed

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1756-L81E

Name: 1756-L81E
Brand: Allen-Bradley

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Product image is representative; revision or series may vary. Contact us to request a specific version.

Product Information

Product Describe

PROGRAMMABLE CONTROLLER MODULE
CONTROLLOGIX 5580
3 MB USER MEMORY
2 GB SD CARD MEMORY
100 ETHERNET/IP NODE CAPACITY
1 USB PORT
1 ETHERNET/IP PORT
1200 MA AT 5.1 VDC/5 MA AT 1.2 VDC
0 TO 60 DEGREE C OPERATING TEMPERATURE

Technical specifications for 1756-L81E

Product Model

1756-L81E
Product Parameters

PROGRAMMABLE CONTROLLER MODULE
Tariff Code

8537101190
Country of origin

USA
Place of shipment

Xiamen, China
Estimated Shipping Size

3.5x14x14.5cm
Manufacturer

Allen-Bradley
Weight

0.4 kg
Isolation Voltage

50 Volts Continuous
Power Dissipation

6.2 Watts
Current Draw (1.2 Volts DC)

5.0 Miliamperes
Current Draw (5.1 Volts)

1.20 Miliampere

Factory New

These are new and current items that are procured from the manufacturer.
New No Package

These parts are new. They have not been used, but their original packaging is no longer available.
New In Opened Package

These parts are new. They have not been used, but their original packaging has been opened or the packaging is significantly aged.
New In Sealed Package

Parts are new. They have not been used and still have their original package seal intact.
New in Original Package

These parts are new. The packages were not originally sealed by their original manufacturer.

Warranty Period & Disclaimer

Amikon is not an authorized distributor unless otherwise specified, representative, or affiliate of the manufacturer of this product. All trademarks and documents are the property of their respective owners and are provided for identification and informational.

FAQs

What is the 1756-L81E?+

It is a ControlLogix 5580 controller with 3 MB of user memory, a built-in 1-gigabit (Gb) Ethernet port, and a USB port. It is designed for high-performance applications in the ControlLogix chassis.
How many Ethernet/IP nodes does the 1756-L81E support?+

It supports up to 60 nodes with Firmware Version 29, and up to 100 nodes with Firmware Version 30 or later.
Does the 1756-L81E require a battery?+

No, 1756-L8 series controllers use a built-in energy storage module rather than a battery to maintain memory during power loss.
Is this product brand new?+

Yes, AB 1756-L81E is brand new, original, unused, and factory sealed

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Revisions

Revision Part #

Also known as

1756-L81E/A

1756-L81E-A Rev A

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1756-L81E/B

1756-L81E-B Rev B

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Product

MORE INFORMATION

Overview Manuals Technical notes Product Applications Performance Characteristics

Features:

ControlLogix 5580 Processor 3Mb
50 Volts Continuous
100 Mbps, and 1000 Mbps
1 USB port and an embedded Ethernet port

The 1756-L81E controller is one of the standard ControlLogix series industrial controllers that is designed and manufactured by Allen-Bradley/Rockwell Automation. It has 1 USB port and an embedded Ethernet port. The 1756-L81E standard controller can communicate on the Ethernet network at speeds of 10 Mbps, 100 Mbps, and 1000 Mbps. In addition to the Ethernet network, the 1756-L81E standard controller can also communicate through the DeviceNet, ControlNet, Data Highway Plus, Synchlink, and Remote I/O networks, and also various third-party networks. This controller has 3 MB of user memory and it can be installed in any slot that is available in the system chassis.

The 1756-L81E lies in the low-end of the 1756-L8 series controllers as it only comes with a 3MB user memory and shipped with a 2GB non-volatile memory via the 1784-SD2 Secure Digital (SD) card. This controller is capable of handling a maximum number of 128,000 Discrete Input and Output signals and 4000 Analog Input and Output signals. It also eliminates the need of a battery to back-up the RAM of the controller as it is provided with the environmentally friendly energy storage solution.

The 1756-L81E Allen-Bradley ControlLogix 5580 Controller may still be available for purchase and support from Amikon Limited beyond End-Of-Life (EOL) by the manufacturer (OEM).

Allen-Bradley 1756-L81E ControlLogix 5580 Controller Manuals, Datasheets, Drivers, Link

Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

The 1756-L81E lies in the low-end of the 1756-L8 series controllers as it only comes with a 3MB user memory and shipped with a 2GB non-volatile memory via the 1784-SD2 Secure Digital (SD) card. This controller is capable of handling a maximum number of 128,000 Discrete Input and Output signals and 4000 Analog Input and Output signals. It also eliminates the need of a battery to back-up the RAM of the controller as it is provided with the environmentally friendly energy storage solution.

This controller is a controller module that only requires a single slot in the chassis. It may be installed to a variety of ControlLogix chassis such as 1756-A4, 1756-A4K, 1756-A7, 1756-A7K, 1756-A10, 1756-A10K, 1756-A13, 1756-A13K,1756-A17, 1756-A17 K Series B, Series C chassis. It is also capable of being configured in simplex and redundant or high-availability systems with compatibility to a wide variety of power supplies such as 1756-PA50, 1756-PA72, 1756-PA72K, 1756-PA75, 1756-PA75K, 1756-PB50, 1756-PB72, 1756-PB72K, 1756-PB75, 1756-PB75K, 1756-PH75, 1756-PC75 standard power supplies and 1756-PA75R, 1756-PA75RK, 1756-PB75R, 1756-PB75RK, 1756-PSCA2, 1756-PSCA2K redundant power supplies.

Water/Wastewater:Automates pumping stations & monitors flow, pH, and turbidity
Food & Beverage:Filling lines & batching systems with strict regulatory adherence
Life Sciences:Precise process control in pharma manufacturing where data integrity is critical

This content has been produced using multiple sources.Amikon takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.

Faster Execution: It executes instructions significantly faster than older 1756-L7 series controllers.

Asynchronous I/O: I/O data updates independently of logic execution; it is recommended to buffer inputs if they are referenced multiple times in a single scan.

Function Block Functions: This model supports unique "Function Block functions" that use less memory and execute faster than standard instructions.

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Warranty
All parts new original are covered by Amikon 12 month warranty

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Why Choose Amikon Limited?

When it comes to industrial automation, reliability, speed, and trust matter. At Amikon Limited, we go beyond just supplying parts — we deliver confidence.

● Extensive Inventory Reach: Nearly 1 million automation parts at your fingertips, including legacy and obsolete models.
● 20+ Years of Expertise: Trusted by engineers, project managers and government companies worldwide for our professional service.
● Quality You Can Trust: Each unit is strictly inspected by the warehouse staff to ensure product quality
● Fast Global Shipping: We help you minimize downtime with express logistics worldwide.
● 1-Year Warranty Available: Peace of mind with every purchase backed by one year warranty guarantee.

Whether you're maintaining legacy systems or building future-ready projects, Amikon Limited is your dependable partner in precision and performance.

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Disclaimer: We are not an authorized distributor or distributor of the product manufacturer of this website, The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because our company is not an authorized distributor of this product, the Original Manufacturer’s warranty does not apply.While many DCS PLC products will have firmware already installed, Our company makes no representation as to whether a DSC PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. Our company also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from our company, its distributors, or any other source. Our company also makes no representations as to your right to install any such firmware on the product. Our company will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.

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1756-L81E

Product Information

Technical specifications for 1756-L81E

Factory New

New No Package

New In Opened Package

New In Sealed Package

New in Original Package