Allen-Bradley 1756-L81E ControlLogix PLC Controller
$4,433.00
Out of stock
Request QuoteThe 1756-L81E is an Allen-Bradley ControlLogix 5580 controller with 3 MB user memory, embedded 1 Gb Ethernet port, and USB 2.0. Supports up to 60 (std) / 100 (v29+) EtherNet/IP nodes and 128,000 I/O points. Programs in Ladder Diagram, Structured Text, Function Block, and SFC on the ControlLogix platform.
| User Memory | 3 MB |
| EtherNet/IP Nodes | 60 (std) / 100 (v29+) |
| Comms | 1 USB 2.0, Embedded Ethernet port (10/100/1000 Mbps) |
| Programming | LD, ST, FBD, SFC |
| Slot Width | 1 slot, any slot |
| Platform | ControlLogix (1756) |
PLC Exchange is not an authorized distributor: Original Packaging is synonymous with Used Surplus. See Original Packaging or Warranty for more information.
Description
Allen-Bradley 1756-L81E
The 1756-L81E is an Allen-Bradley ControlLogix 5580 controller with 3 MB user memory and an embedded Ethernet port (10/100/1000 Mbps) plus USB 2.0. Supports up to 60 (std) / 100 (v29+) EtherNet/IP nodes with I/O capacity of 128,000 (without CIP Security) / 40,000 (with integrity) / 20,000 (with integrity + confidentiality). Mounts in any slot of a 1756 ControlLogix chassis with a single-slot footprint.
| Controller Overview | |
|---|---|
| Catalog Number | 1756-L81E |
| Controller Type | ControlLogix 5580 Standard Controller |
| User Memory | 3 MB |
| EtherNet/IP Nodes | 60 (std) / 100 (v29+) |
| I/O Capacity | 128,000 (without CIP Security) / 40,000 (with integrity) / 20,000 (with integrity + confidentiality) |
| Programming | LD, ST, FBD, SFC |
| Nonvolatile Storage | 4 GB microSD (1784-MSD8) |
| Power Cycles | 80,000 |
| Power & Electrical | |
|---|---|
| Power Dissipation | 6.2 W / 21.2 BTU/hr |
| Current Draw | 5.0 mA @ 1.2V DC, 1.20 A @ 5.1V DC |
| Isolation | 50V continuous, Basic Insulation, USB to backplane / Ethernet to backplane / USB to Ethernet, IEC/UL 61010-1 |
| Communications | |
|---|---|
| Embedded Ethernet | 1 port (10/100/1000 Mbps) |
| USB | 1 USB 2.0 |
| Message Rate (Front Port) | 2000 / 1500 / 900 (without / integrity / integrity + confidentiality) |
| Message Rate (Backplane) | 4000 (w/ EN4TR) / 2000 (w/ safety partner or Logix redundancy) |
| Physical & Environmental | |
|---|---|
| Weight | 0.394 kg (0.868 lb) |
| Slot Width | 1 slot, any slot |
| Operating Temp | 0…60 °C (Series C) / 0…50 °C (Series B) |
| Nonvolatile Storage | 4 GB microSD (1784-MSD8) |
PLC Exchange Original Packaging is synonymous with Used Surplus. Because we are not an authorized distributor, we are not legally allowed to claim these items as “New”, “Factory Sealed”, or any other term that may imply such. We have over 10 years of experience working with trusted suppliers to make sure you receive the top-quality hardware you need. Used Surplus items ship in their original packaging, with the same function and contents as OEM-supplied materials. PLC Exchange is an independent supplier of industrial automation products and is not affiliated with the brand manufacturer or any of its authorized distributors. All warranties are provided directly by PLC Exchange. Trademarks, logos, and brand names referenced are property of their respective owners and are used for descriptive identification only.
Disclaimer: PLC Exchange is an independent reseller and is not an authorized distributor, affiliate, licensee, partner, or agent of Allen-Bradley / Rockwell Automation. All product information on this page is compiled from publicly-available manufacturer publications, technical data sheets, and catalog sources, each of which remains the copyright of its originating manufacturer. We make no representation or warranty, express or implied, regarding the accuracy, completeness, timeliness, or fitness for any particular purpose of the specifications or descriptions shown — content may contain errors, omissions, or out-of-date information. Product images are the property of their respective manufacturers, trademark owners, and source publications, and are displayed solely for identification purposes under the nominative fair use doctrine; images are representative and may depict a different configuration or catalog variant than the exact product listed. Purchasers should independently verify specifications against the current manufacturer publication before placing an order. All product names, trademarks, service marks, and registered trademarks are the property of their respective owners, and their use does not imply endorsement or affiliation.
Technical Notes for 1756-L81E
- Refer to the manufacturer's installation instructions for proper mounting, wiring, and configuration.
- Ensure compatibility with your existing system architecture before ordering.
- All 1756-L81E units sold by PLC Exchange are tested and ship in original factory packaging.
- For application-specific questions or system compatibility verification, contact PLC Exchange technical support at [email protected] or 980-202-0882.
Alternative Part Numbers & Names for 1756-L81E
The 1756-L81E by Allen-Bradley may also be found under the following alternative names, catalog numbers, or common search variations:
- 1756L81E
- Allen Bradley 1756-L81E
- Allen-Bradley 1756-L81E
- 1756 L81E
- 1756/L81E
- ControlLogix 1756-L81E
All variations refer to the same Allen-Bradley product. If you are unsure whether this is the correct part for your application, contact our team for assistance.
Additional information
| Weight | 1.1 lbs |
|---|---|
| Dimensions | 3.94 × 3.35 × 5.67 in |
| mpn | 1756-L81E |
| manufacturer | Allen-Bradley |
| condition | Original Packaging |
| warranty | 2.5 Year PLC Exchange Warranty, 30 Days worry-free return from delivery |
| upc | 887172361326 |
Dimensions & Weight for 1756-L81E
| Shipping Dimensions | |
|---|---|
| Weight | 1.1 lbs |
| Length | 3.94 in |
| Width | 3.35 in |
| Height | 5.67 in |
| Box Dimensions (L×W×H) | 3.94 × 3.35 × 5.67 in |
Dimensions shown are for the shipping package. For module-level mechanical dimensions, refer to the manufacturer datasheet.
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Frequently Asked Questions
Where can I find the technical datasheet for the 1756-L81E?
The official manufacturer datasheet is available for download on the 1756-L81E product page at PLC Exchange. Look for the Tech Data PDF link in the product description.
What programming languages does the 1756-L81E support?
The 1756-L81E supports: LD, ST, FBD, SFC.
Does the 1756-L81E include a warranty?
Yes. Every 1756-L81E sold by PLC Exchange includes a 2.5-year warranty (30 months, full replacement). Details: https://plcexchange.net/warranty-information/
What is the return policy for the 1756-L81E?
PLC Exchange offers a 30-day worry-free return policy. Eligibility and details: https://plcexchange.net/return-policy/
When will my 1756-L81E ship?
In-stock orders placed before 4 PM ET ship the same business day via free UPS Ground. Expedited options (Next Day Air, 2nd Day Air) are available at checkout.
Who manufactures the 1756-L81E?
The 1756-L81E is manufactured by Allen-Bradley. PLC Exchange is an independent reseller specializing in Allen-Bradley industrial automation products.
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