All is in the title.

I have an API rack with power supply module 500PS (the part with the power button on the front side plugged into the 11th slot on the right side). It looks like a 500 series module, but it is dedicated to supply the rack backbone.
The 500PS doesn't provide 48V phatom power supply, but there is each dedicated component place on the PCB.

I would like to find the API schematics for the same module but including the components for 48V so I could modify mine.

Thanks in advance for the one who will give me the solution.