- Low heating of the control cabinet - High power reserves - Particularly space-saving design - Low inrush current - Safe switch-off by circuit breakers in case of short circuit AS-i power supplies provide power to the connected modules, sensors and actuators. They provide high noise immunity and sufficient power reserves to reliably handle short current spikes. In addition, they ensure reliable decoupling from interference in the primary supply. The compact housing takes up very little space in the control cabinet. Thanks to their high degree of efficiency, the units save energy costs and reduce waste heat in the control cabinet.