1756-L81EXT: Controller
The 1756-L81EXT is the Controller covered on this page. The attribute that decides whether it fits the existing installation without modification is 5 mA at 1.2V DC.
This configuration's controller is the attribute that drives the replacement decision. A processor or controller is selected on memory, scan time and platform compatibility before anything else. controller sets how much programme fits, how fast the logic executes and which I/O and networks the unit can host — the three things that decide whether an existing application migrates without a rewrite. Confirming 5 mA at 1.2V DC against the installed controller family is the check that prevents a processor that boots but cannot run the existing project.
| Feature | Specification |
|---|---|
| Manufacturer | Rockwell Automation |
| Brand | Allen-Bradley |
| Part Number | 1756-L81EXT |
| Series | ControlLogix |
| Part Number | 1756-L81EXT |
| Product Type | Controller |
| Product Line | ControlLogix-XT |
| Controller Tasks | 32 |
| Programs Per Task | 1000 |
| Communication | USB and Ethernet ports |
| User Memory | 3 MB |
| Minimum Current Draw | 5 mA at 1.2V DC |
| Maximum Current Draw | 1.2 A at 5.1V DC |
| Thermal Dissipation | 21.2 BTU/hour |
Related Configurations
Other published configurations in the same family — confirm the distinguishing specification against your installation:
| Related Part Number | Configuration Difference |
|---|---|
| allen-bradley-1756-l81e-controllogix-5580-processor-3mb-ethernet-usb | confirm the configuration against your installation |
| allen-bradley-1756-l81e-nse-controllogix-5580-controller | confirm the configuration against your installation |
| allen-bradley-1756-l81ek-controllogix-5580-controller-3mb-memory | confirm the configuration against your installation |
| allen-bradley-1756-l81ep-controllogix-5580e-process-controller | confirm the configuration against your installation |
| allen-bradley-1756-l81es-guardlogix-5580-safety-controller-overview | confirm the configuration against your installation |
Availability & Condition at AutoDCSTech
| Part Number | 1756-L81EXT |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | US |
