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20. Which of the following statements correctly describes a programmable logic controller?

A. It has several sets of time-delayed contacts.
B. It has one timed coil.
C. It's a solid-state device.
D. It's a hardwired controller.

Sagot :

GinnyAnsweridn

Final answer:

A programmable logic controller (PLC) is a solid-state device used in industrial automation to control machinery and processes through custom logic programs.


Explanation:

A programmable logic controller (PLC) is a solid-state device commonly used in industrial automation to control machinery and processes based on custom logic programs. Unlike a hardwired controller, a PLC can be reprogrammed and adapted to various applications without rewiring. It typically has multiple sets of time-delayed contacts for precise control and can execute complex control algorithms efficiently.


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