PSK Encapsulated AC/DC Power Supplies CUI Inc. PSK AC/DC Power Supplies are 6W, 10W, 15W, and 20W continuous power devices with a universal input of 85VAC to 264VAC. The compact, encapsulated design of the PSK series offers a single output from 5VDC to 24VDC (48VDC for PSK-15B), protection from short circuits, over-voltage, and over-current. These CUI Inc. power supplies also feature 4000VAC isolation with no load power consumption <,100mW.