TRIO Power Supplies Phoenix Contact TRIO Power Supplies are DIN-rail mountable power supply units with basic functions. These devices are particularly suited for use in series production in mechanical engineering. Phoenix Contact TRIO Power Supplies offer an output voltage of 12VDC, 24VDC, and 48VDC, and 1- and 3-phase versions with 60W or 960W. The series features a wide-range input and an international certification package that allows for worldwide implementation.