Which component provides power to a PLC?

Which component provides power to a PLC?

• A. Input Modules
• B. Power Supply
• C. I/O Chassis
• D. Programming Device

Answer: (B)

Giving the PLC its operating power comes from the power supply. This component converts the incoming electrical power (usually AC) into the DC voltages the PLC needs and distributes that power to the CPU, memory, and I/O modules. Without the power supply, the entire system can’t run, since the other components (input modules, I/O chassis, and the programming device) rely on that power but don’t generate it themselves. The programming device is used to load programs and communicate with the PLC, not to power the rack, and the input modules and I/O chassis simply handle signals and mount the modules, not supply main power. So the power supply is the source that powers the entire PLC system.

Giving the PLC its operating power comes from the power supply. This component converts the incoming electrical power (usually AC) into the DC voltages the PLC needs and distributes that power to the CPU, memory, and I/O modules. Without the power supply, the entire system can’t run, since the other components (input modules, I/O chassis, and the programming device) rely on that power but don’t generate it themselves. The programming device is used to load programs and communicate with the PLC, not to power the rack, and the input modules and I/O chassis simply handle signals and mount the modules, not supply main power. So the power supply is the source that powers the entire PLC system.