Ask our team:
  • Phone: +86 181 0690 9650
  • E-Mail sales1@apterpower.com
  • Lifecycle status

    Active / Available from OEM
    Apter Power checks catalog identity, official records, project fit, and shipping details before quotation.

1756-L81E

/ 4.9
1001 reviews | Need a Specific Revision?
Allen-Bradley 1756-L81E is the entry ControlLogix 5580 controller for standard chassis control with integrated EtherNet/IP connectivity.
In Stock
Ships by Thursday, October 29
Fast Shipping Available
Get a quick price for 1756-L81E
Quantity
*E-mail
Company
*Mobile
*Content
Upload (gif, jpg, jpeg, png, bmp, doc, docx, xls, xlsx, ppt, pdf, csv)

Technical specifications for 1756-L81E

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1756-L81E
  • Product Family:
    ControlLogix
  • Product Type:
    ControlLogix 5580 Controller
  • Stock:
    1
  • Product Series:
    ControlLogix 5580
  • User Memory:
    3 MB
  • EtherNet/IP Devices:
    60 with Studio 5000 v29; 100 with v30 or later
  • Integrated Ethernet:
    1 x 1 Gb EtherNet/IP port
  • Local Programming Port:
    1 x USB 2.0
  • Nonvolatile Storage:
    4 GB Secure Digital card (1784-SD4) preinstalled
  • Maximum Digital I/O:
    128,000 points
  • Maximum Analog I/O:
    4,000 points
  • Power Dissipation:
    6.2 W
  • Operating Temperature:
    0 to 60 °C in Series C chassis; 0 to 50 °C in Series B chassis
  • Weight:
    0.394 kg
  • Estimated shipping dimensions:
    3.46x14.55x14.01cm
  • Tariff Code:
    8537101190
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Program Structure Motion Paths Chassis Envelope Product Applications

Features:

  • Controller role: standard ControlLogix 5580 logic and I/O ownership
  • Program organization: 32 tasks with as many as 1,000 programs per task
  • Recovery medium: a 4 GB 1784-SD4 card is supplied preinstalled
1756-L81E gives a small ControlLogix 5580 architecture an integrated controller and Ethernet path in a single slot.

1756-L81E is a standard controller, so an application that requires a governed safety task must be evaluated against the GuardLogix catalog rather than inferred from the shared chassis format.

1756-L81E selection is strongest when the compiled project, I/O ownership, network inventory, and recovery procedure are reviewed together before the spare is commissioned.

Apter Power can coordinate catalog verification, official literature, quotation, and pre-shipment checks for 1756-L81E.
Allen-Bradley 1756-L81E ControlLogix 5580 Controller Manuals, Datasheets, Links 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.
  • Task framework: 32 controller tasks separate periodic, continuous, and event-driven execution
  • Program capacity: up to 1,000 programs per task supports modular project organization
  • Languages: ladder, structured text, function block, and sequential function chart serve different control routines
  • EtherNet/IP motion: integrated motion can share the controller's industrial Ethernet architecture
  • Legacy paths: SERCOS and analog motion options require the appropriate chassis hardware
  • Software boundary: SERCOS support is associated with Logix Designer version 31 or later
  • Slot use: one ControlLogix slot keeps the controller footprint predictable
  • Chassis series: Series C permits a 60 °C upper limit, while Series B is limited to 50 °C
  • SD discipline: the 1784-SD4 image, firmware, and load mode should remain under one change record
  • Compact automation: standard machine and process sequences that fit the controller resource budget
  • Distributed I/O: EtherNet/IP architectures sized from the compiled controller resource budget
  • Coordinated motion: supported motion applications using qualified drives, modules, and project resources
Description
Combining Logix execution and a 1 Gb EtherNet/IP interface in one chassis slot, Allen-Bradley 1756-L81E is a 3 MB standard ControlLogix 5580 controller. It gives compact machines and process skids a current-generation controller without requiring a separate module for the primary Ethernet path.

Within a distributed architecture, 1756-L81E owns I/O, executes coordinated logic, exchanges produced and consumed data, and can participate in supported motion designs. ControlNet, DeviceNet, Data Highway Plus, Remote I/O, or SERCOS roles still depend on the appropriate ControlLogix communication or motion hardware.

A migration to 1756-L81E must be sized against the actual Logix Designer application rather than the family name alone. The software release changes the published EtherNet/IP node allowance, so the converted project, controller firmware, chassis series, recovery image, and expansion plan belong in the same acceptance review.
Revisions

Revision Part #

Also known as

1756-L81E Ser A
1756-L81E/A, Series A, Rev A
1756-L81E Ser B
1756-L81E/B, Series B, Rev B
Alternative Names
Allen-Bradley ControlLogix 5580 L81E Rockwell Automation 1756 L81E Controller ControlLogix 5580 3 MB Controller
Technical notes
For 1756-L81E, freeze the Logix Designer baseline before expanding the I/O tree: version 29 supports 60 EtherNet/IP nodes, while version 30 or later supports 100. Recount only devices added directly beneath the controller, then review communication objects and compiled headroom before approving a migrated or enlarged project.
Exceptional Service

Our Mission

  • 100% Satisfaction

    We believe expertise is priceless. With over 20 years of experience, and top engineers on staff, we can help you solve or avoid problems that threaten your business.
  • Trust Guaranteed

    Not only do we have a vast inventory, our team makes sure every piece of equipment is in working condition. Your purchases are also backed by our Warranty.
  • Expertise

    Time is money, especially when your equipment is down. We work quickly to get your equipment on its way so you can get it back up and running.

FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
During a ControlLogix 5570 migration, can an existing project be downloaded directly to 1756-L81E?
Treat the change as a controller conversion. Use a supported Logix Designer release, change the controller type, resolve conversion messages, check compiled capacity, and test I/O and communications before production use.
Can 1756-L81E reach an installed ControlNet or DeviceNet segment through its embedded Ethernet port?
No. Select the supported ControlLogix communication module or linking device for the legacy network, then include that hardware and its connections in the converted project.
After a spare 1756-L81E is installed, when should maintenance load the SD-card image?
First match the stored image, controller firmware, series, and intended load mode. Follow the documented restore procedure and never remove the card or interrupt power while the SD indicator is active.
What evidence should be captured when 1756-L81E reports a major fault after commissioning?
Record the four-character display, OK and I/O indicators, SD activity, major-fault code, task state, and latest project change before clearing the fault or cycling power.
How should a buyer qualify 1756-L81E as a spare for an installed controller?
Match the complete catalog number, hardware series, firmware, chassis series, project revision, and recovery package. A catalog-family match alone does not establish a ready substitution.
What changes when CIP Security is introduced around 1756-L81E?
Use a supported controller firmware and Studio 5000 environment, then plan certificates, time synchronization, trusted endpoints, and a tested recovery path before enforcing the security policy.

Product Browsing History