The Riello MultiSwitch-S Plus STS Source Transfer Switch from the Critical Power Supplies STS range is a serial communications enabled version of the standard Riello MultiSwitch.

MultiSwitch STS provides electrical distribution and remote management for up to eight network users, powered from either one or two direct mains supplies or UPS or a combination of both.

MultiSwitch STS can connect each user (up to eight, each with a maximum power demand not greater than 3A), to either of the two power sources (A and B). Load demand is shown on the LCD.