The Unisource PS2305 Triple Output DC Power Supply, 30V/5A Dual Variable, 5V/3A Fixed consists of two identical, independently adjustable and one fixed 5V/3A outputs. This model offers a front panel switch to select one of three modes of operation: independent, series and parallel. In the independent mode, the output voltages of each supply are controlled separately, and each supply is isolated up to 300V from output to chassis or output to output. In tracking mode, both outputs are automatically connected in series or parallel, and the controls of the left supply adjust the magnitudes of both the positive and negative output voltages.