the monitoring of regulated redundant power supplies is enhanced by returning to each power supply a feedback voltage signal that is indicative of the voltage level that the respective power supply is outputting and the voltage level supplied to a system load . in one embodiment , a feedback signal that is supplied to a power supply as the sensed signal is derived using a voltage divider network across the output of the power supply and a common connection at which the outputs of the power supplies are “ ored ” for delivery to the system load . in this way , each power supply regulates its output voltage as a function of the level of the feedback signal and the level of a respective preset signal .