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Line 38: A PLC is an industrial microprocessor-based controller with programmable memory used to store program instructions and various functions.<ref>{{Harvnb\|Bolton\|2015\|p=5}}</ref> It consists of: * A processor unit (CPU) which interprets inputs, executes the control program stored in memory and sends output signals, * A ~~[https://plcmeaning.com/plc-power-supply/~~ power supply unit] which converts AC voltage to DC, * A memory unit storing data from inputs and program to be executed by the processor, * An input and output interface, where the controller receives and sends data from and to external devices,

Programmable logic controller: Difference between revisions