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.
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.
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