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1756-L81E – ControlLogix 5580 controller
1756-L81E is a current Allen-Bradley ControlLogix 5580 controller (Rockwell lifecycle status: Active, read on 30 October 2026). It replaces 1 discontinued catalog number in TDL's end-of-life lookup. TDL quotes 1756-L81E as a spare or as part of a replacement, and carries out the change on site: configuration, program changes where needed, and testing.
| Catalog number | 1756-L81E |
|---|---|
| Rockwell description | ControlLogix 5580 Controller with 3 MB User Memory, USB Port, 1 gigabit (Gb) Ethernet port, 100 EtherNet/IP Devices, 4 Character Alpha/Numeric Display |
| Rockwell lifecycle status | Active — sold and supported (read on 30 October 2026) |
| Product family | ControlLogix 5580 controller |
| Rockwell technical documents | 1756-IN043, 1756-TD001, 1756-UM543 |
Discontinued parts this catalog number replaces
| Discontinued part | Product | Lifecycle | Basis |
|---|---|---|---|
| 1756-L61 | ControlLogix 5560 Controller 1756-L61 (discontinued) | Discontinued 01/06/2017 | TDL proposal |
Migration notes
- The Rockwell product page lists the category Functional Replacement but names no catalog number. TDL proposes ControlLogix 5580 sized by memory: 1756-L81E (3 MB), a family with an integrated EtherNet/IP port.
- ControlLogix 5560 controllers (1756-L61…L65) were discontinued on 01/06/2017; the product pages list Functional Replacement but name no catalog number, so the ControlLogix 5580 numbers in the table are TDL proposals sized by memory. The 1756-CNB/CNBR ControlNet modules have Rockwell-named replacements (1756-CN2/CN2R); for the 1756-DHRIO and 1756-RIO the Rockwell pages name no replacement.
Lifecycle status changes over time: confirm the current status on the Rockwell product page or in the Product Compatibility and Download Center before ordering.
Related services: Lifecycle review and spare parts Rockwell Automation upgrades ControlLogix in TDL Projects
Other current parts in this family
1756-L82E 1756-L83E 1756-L84E 1756-L85E
Sources
- Rockwell Automation, Rockwell product page 1756-L81E — read on 30 October 2026
- TDL, End-of-life lookup: 1756-L61