ADCIO module (means ADC + IO) consist 8 input 16-bit Analog to Digital Converter and 8 digital IO. First 4 digital pins configured as output can drive 4 MOSFET transistors and switch 4A constant current in Open Drain configuration. Next 4 pins can works as universal inputs or outputs in 3.3V CMOS standard.
Inputs of the analog to digital converter are connected to 4 conectors. Every connector have 5V supply, ground and 2 inputs working in range 0-4V.