What Is a PLC? An Introduction to Programmable Logic Controllers
https://control.com/technical-articles/what-is-a-plc-an-introduction-to-programmable-logic-controllers/
WebMar 10, 2022 · A PLC is composed of a few basic parts. They might look slightly different from various manufacturers, but the purpose and scope of each component are the same. These include a power supply, a central processing unit (CPU), input/output cards, and a backplane or rack that the input/output (I/O) cards are placed into.
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