Wiring ASDA-B3 When the drive connects to an inductive load, you must install the diode (permissible current: below 40 mA; surge current: below 100 mA; maximum voltage: 30V). 3 C5: DO wiring - the servo drive uses an external power supply and the resistor is for general load. Servo drive R 24 V DC DOX+ DOX- C6: DO wiring - the servo drive uses an external power supply and the resistor is for inductive load. Servo drive Make sure the polarity of diode is correct, 24 V DC 3-52 DOX+ DOX- or it may damag servo drive.