Attributes . AI1 voltage 0...10 V DC 30 kOhm 10 bits || AI2 bipolar differential voltage +/- 10 V DC 30 kOhm 10 bits || AI3 current 0...20 mA (or 4-20 mA, x-20 mA, 20-x mA or other patterns by configuration) 250 Ohm 10 bits . Names