What it is
The ACS800-ITTU1-0016-5-P901 is an ABB drive, listed under Motors & Motor Controls / Drives / Motor Drives with the order code preserved verbatim on the nameplate for BOM trace.
Where this class is used
ACS800-series drives sit between the supply and a three-phase induction or permanent-magnet motor, shaping volts-per-hertz or sensorless-vector torque across the speed range demanded by the driven load.