Allen-Bradley 1756-L81E ControlLogix 5580 controller

The Allen-Bradley 1756-L81E is a ControlLogix controller from the ControlLogix 5580 product family, the latest and modern designed ControlLogix series. It is a Programmable Automation Controller (PAC) that comes with modern connectivity and modern features allowing it to be used as migration platform for legacy controllers such as PLC5 and SLC500 controllers and solutions for demanding industrial application requirements.

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.

Technical specifications for 1756-L81E

ManufacturerRockwell Automation

Isolation Voltage50 Volts Continuous

Power Dissipation6.2 Watts

Current Draw (5.1 Volts)1.20 Miliamperes

Current Draw (1.2 Volts DC)5.0 Miliamperes

User Memory3 MB

Module TypeControlLogix Controller

Part Number/Catalog No.1756-L81E

EnclosureNone (Open-Style)

BrandAllen-Bradley

Communication interfacesOne (1) Ethernet; One (1) USB

Chassis1756-A4, 1756-A4K, 1756-A7, 1756-A7K, 1756-A10, 1756-A10K, 1756-A13, 1756-A13K,1756-A17, 1756-A17 K Series B, Series C

Standard Power Supply1756-PA50, 1756-PA72, 1756-PA72K, 1756-PA75, 1756-PA75K, 1756-PB50, 1756-PB72, 1756-PB72K, 1756-PB75, 1756-PB75K, 1756-PH75, 1756-PC75

Redundant Power Supply1756-PA75R, 1756-PA75RK, 1756-PB75R, 1756-PB75RK, 1756-PSCA2, 1756-PSCA2K

SeriesControlLogix

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.

1756-L81E

ControlLogix Controller, 128000 Maximum I-O, 4000 Maximum Analog I-O, 6.2 Watts

1756-L81EK

ControlLogix Controller, N/A I-O Memory, 128000 Maximum I-O, 6.2 WattsConformal Coat