In this Tech Toolbox, the editors of Design World detail how PLCs came to replace relay-based controls as well as which PLC logic and memory board arrangements are most common today, as well as backplane interfaces to I/O modules and other circuitry.
Programmable logic controllers or PLCs are microprocessor-based components that serve as the programmable smarts for simple or isolated applications. They’re also finding increasing use on integrated machinery and automated installations with extensive IIoT connectivity.
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