What the part is
The ABB ACS800-U1-0009-5+B056 is a wall-mount AC drive in the ACS800-U1 family, listed as a Motor Drive under Motors & Motor Controls. The listed mass is 18.14 kgs — the figure that drives handling, lifting, and panel load planning.
Where this class lands in the panel
The ACS800-U1-0009-5+B056 is listed under Drives / Motor Drives for motor control panel integration. The 18.14 kgs figure is the single rating that sets how the drive is handled on site — a two-person lift into the back panel, with clearance left around the cooling fins for airflow — and that handling envelope is what this mass actually governs.