The 12V line is connected to the AOV. AI1- is the UniPi GND so it is connected to the AOG. AOV is the connector providing the Analog Output positive voltage which is connected to the AI1+. This way, you will see the your analog output directly on your analog input. | The 12V line is connected to the AOV. AI1- is the UniPi GND so it is connected to the AOG. AOV is the connector providing the Analog Output positive voltage which is connected to the AI1+. This way, you will see the your analog output directly on your analog input. |