Hello, the MIO module is grounded to yellow/green earth through the wall outlet. What do you mean with the digital ground?

Hello! I am using my MIO extension for my RevPi Connect S I have one analog input which i have put 5 volts on. The value in the computer is around 5000 then. However, when i put a high 24v dc on digital input 1 in the X2 connector, the analog value becomes 10744. Eventhough only 5 volt is on the ana...