EdgeLogix-RPI-1000 Access DIO

I have an EdgeLogix-RPI-1000 and I don’t know how to access the DIO (X30) interface. Is it with some GPIO pins or some serial connection?

I have the same problem, I would like to access the X30 from Codesys but I don’t know how.
I’ve searched all the available documentation but haven’t found anything.
A suggestion would be greatly appreciated.