Attributes . AI1, AI2, AI3 software-configurable voltage 0...10 V DC 31.5 kOhm 12 bits || AI1, AI2, AI3 software-configurable current 0...20 mA 250 Ohm 12 bits || AI2 voltage analog input - 10...10 V DC 31.5 kOhm 12 bits . Names