The IsoPower A 20900 power supply provides a 24 V DC output voltage via two terminal pairs. Additional DIN rail bus connector contacts are located on the rear. When the IsoPower power supply is snapped onto the DIN rail, the DIN rail bus is automatically supplied with 24 V. The IsoPower A 20900 is equipped with a broad-range power supply. A floating signal contact indicates if the output voltage is out of range by more than 10 %.