ABB ACS380-042S-04A0-4 machinery drive. ABB ACS380-042S-04A0-4 is an ACS380 machinery drive rated 380-480 V AC, three-phase. 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.