The HMIYRMRC41 is a spare redundant AC auxiliary power supply rated at 500 W, designed for the Harmony iPC RackPC 4U industrial panel PC platform. It sits inside the 4U rack chassis, providing the main DC power rails for the CPU backplane, storage drives, and expansion slots.
What the 500 W rating means for fit
The 500 W rating is the total continuous output the supply can deliver to the RackPC 4U's internal loads. When sizing a replacement, confirm that the combined draw of the CPU module, any PCIe cards, and the storage backplane stays under this ceiling — exceeding it will trigger the overcurrent protection or cause the supply to drop out under load.