What the order code covers
The ABB ACS550-U1-09A0-6+B055 is the configured general-purpose drive variant of the ACS550 family with the +B055 option suffix applied, catalogued under Motor Drives at 11.34 kg chassis mass. +B055 is part of the configured-code ordering system, which means the suffix has to be matched on the BOM line — ordering a bare ACS550-U1-09A0-6 will not deliver the same firmware/keyed behaviour the panel was designed around. Class-wise, the ACS550 line covers the standard industrial VFD slot — fans, pumps, conveyors, mixers — sitting in the same general-purpose tier ABB positions for retrofit and OEM panel work, not the drive family aimed at high-performance servo or hazardous-area installations.
Handling into the cabinet
At 11.34 kg, the unit is a one-person lift onto DIN-rail or backplate with care taken on the heatsink fins — beyond that, panel layout is driven by the cutout and clearance dimensions rather than the mass figure.