What's on the nameplate
The ABB ACS800-U1-0016-5+L501+P901 is a wall-mount AC drive from the ACS800-U1 series, sold under ASEA BROWN BOVERI, with the +L501 and +P901 option codes appended to the base part number. It sits in the Motors & Motor Controls › Drives › Motor Drives category — a single-drive class sized for cabinet mounting, not a multi-drive module. The full suffix string (+L501+P901) is part of the order code, so any RFQ or replacement quote must carry both suffixes exactly to match the as-installed configuration.