The Omron C200HW-PA204S PLC Power Supply Unit converts a 100 to 240 VAC supply into 5 VDC at 4 A for powering compatible modules within a C200H-series Programmable Logic Controller system. Its role is to distribute stable operating power across the PLC architecture so CPU, I/O, and related modules can function as part of the same rack-based automation system. A standby power function supports applications where continuity of controller power is an important system consideration. The unit integrates into industrial control panels used for machine and process automation. The C200HW-PA204S belongs to the C200HW architecture and connects contextually with the industrial PLC power supply range from Omron automation.