Simboards FDT with RS 232 Question

[skino]

I help a friend in the construction of a 777 cockpit with the old Simboards FDT (2005) with RS 232 Unfortunately, no documentation is there. On the website, only the documentation for the USB card can be found. Did someone have the documentation for the cards or a Link.
Especially for electricity supply.

I'm thankful for every tip