The Omron C200HW-PA204 PLC Power Supply Unit provides regulated DC power for CPU, I/O, and communication modules installed in C200H-series Programmable Logic Controller rack systems. It accepts a 100 to 240 VAC input and supplies 5 VDC for the connected controller modules, establishing the power layer required for PLC operation inside industrial control panels. The unit supports machine automation and process control systems where multiple rack-mounted modules depend on a common power source. Within the controller architecture, the C200HW-PA204 supports C200HW control units and related rack components. It also belongs to the wider PLC power supply range associated with Omron industrial control systems.