Hello, I need some information regarding the power supply of multiface II.

My Multiface II is connected via the PCI port but it works only when connected to the power supply. Without power the I/O box is in an error state with all the lights off but connected to power everything runs normally. The I / O box gets very hot and I was wondering if the technical specifications of the power supply in my possession are right. What are the technical specifications of the power supply (VCC, Amps & W)? The Multiface II can also work without? My PC has a power of 500 Watts.

Thank You.