Ladder diagrams (also known as ladder logic) are a graphical programming language used to program programmable logic controllers (PLCs). It represents a program as a series of 'rungs' resembling a ladder. Each rung represents a control instruction, typically involving inputs (sensors, switches) and outputs (motors, lights, valves). Ladder diagrams are widely used in industrial automation to control machines and processes because they are relatively easy to understand by electricians and technicians familiar with relay logic.
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