ABB ACS380-042S-050A-4 22 kW machinery drive. ABB ACS380-042S-050A-4 is an ACS380 machinery drive rated 22 kW, 50 A, 380-480 V AC, three-phase, frame R4. This 042S version provides high filtering: emc category c2 and is the standard bmio-01 i/o and modbus variant. It supports compact OEM machinery, conveyors, mixers, packaging equipment and material handling applications.