What the order code resolves to
The ABB ACS180-04S-06A9-2 is a compact AC drive in the ACS180 family, classified as an IEC PN 1.1 kW unit on ABB's Motor Drives line. At 0.62 kgs, it is a light wall- or DIN-mountable chassis — the kind of frame a panel-builder drops into a small pump, fan, or short-conveyor cabinet without needing a reinforced backplate.
Where this class sits in the panel
The drive carries no separate fieldbus slice in this listing; the listed part description names only the IEC power rating, so protocol and I/O expansion live in the formal ABB datasheet rather than the storefront row — the integrator's terse spec recap holds: what the line shows is what the BOM line is.
Cross-shop against the ACS150 / ACS255 line
The ACS150-03U-03A5-2 (1.09 kgs) and ACS255-01U-04A3-1 (0.91 kgs) sit in the same general frame-class but are separate ABB product lines; a BOM freeze written against an ACS150 panel will not accept an ACS180 without re-validating footprint, terminals, and parameter set.