Which of the following best describes the primary role of the power supply in a PLC?

The primary role of the power supply in a Programmable Logic Controller (PLC) is to provide the necessary voltage and current. This is crucial because the PLC relies on a stable and adequate power source to function properly and to power its various components, including the CPU, input/output modules, and communication interfaces. Without the appropriate voltage and current supplied by the power supply, the PLC would not be able to execute its control tasks or process input signals, leading to potential system failures.

This setup is essential as the power supply ensures that the PLC operates within its specified electrical parameters, which is vital for the reliability and longevity of the system. Proper power management allows the PLC to perform its control functions and address input signals accurately, maintaining the workflow in automated processes.