The ___ section of a programmable controller provides the voltage required for internal operation and charging the internal battery.

The ___ section of a programmable controller provides the voltage required for internal operation and charging the internal battery.

• A. programming
• B. input/output
• C. processor
• D. power supply

Answer: (D)

In a programmable controller, the power supply is what provides the voltage needed by the internal circuits and keeps the backup battery charged. The PLC’s internal operation relies on stable DC voltages, and the backup battery is used to preserve memory during power interruptions. The power supply ensures these voltages are available and continuously maintains the battery so data isn’t lost when main power dips. The other sections—programming handles the software interface, input/output manages field signals, and the processor executes the control logic—do not provide the necessary operating voltage or battery charging.

In a programmable controller, the power supply is what provides the voltage needed by the internal circuits and keeps the backup battery charged. The PLC’s internal operation relies on stable DC voltages, and the backup battery is used to preserve memory during power interruptions. The power supply ensures these voltages are available and continuously maintains the battery so data isn’t lost when main power dips. The other sections—programming handles the software interface, input/output manages field signals, and the processor executes the control logic—do not provide the necessary operating voltage or battery charging.