Which of the following is NOT a component of a PLC system?

In a Programmable Logic Controller (PLC) system, the essential components typically include an input module, output module, and a CPU (Central Processing Unit). The input module is responsible for receiving signals from various sensors and input devices, while the output module sends control signals to actuators and other output devices, allowing the PLC to perform operations based on the processed data.

The CPU acts as the brain of the PLC, executing the control program, processing input signals, and controlling the output signals based on the programmed logic. Each of these components is crucial for the operation of a PLC in managing industrial automation tasks.

In contrast, a power generator, while important for supplying energy to the overall system or facilities, is not considered a direct component of the PLC itself. A PLC requires a stable power source, which could come from a dedicated power supply or generator, but this generator is not inherently part of the PLC architecture or functionality. Therefore, identifying the power generator as not being a component of the PLC system highlights the distinction between necessary power sources and the core operational modules of the PLC.