Model SMP3 power supply/charger converts low voltage AC input, to a 6VDC, 12VDC or 24VDC @ 2.5 amp of continuous supply current output. Model DPS3 is a DIN Rail Mount version of this product. Altronix SMP3 Proprietary Power Supply is one of many Internal PC Power Supplies available through Office Depot. Made by Altronix.