What the order code buys
The ACS55-01N-02A2-2 is a frequency converter in the ACS55 line, listed under the Motor Drives sub-category, sized in the 02A2-2 current frame. At 0.32 kgs the unit is a one-hand DIN-rail mount, so a panel wireman can stage it on the rail, land the control terminals, and dress the motor leads without clearing a second pair of hands for handling — relevant when the panel build slot is tight and the converter is going in alongside contactors and a small breaker.
The ACS55 class is the go-to ABB micro-drive for low-power single-phase input applications — fan, pump, small conveyor, mixer motor — where the cabinet footprint has to stay compact and the I/O requirement is a handful of digital references rather than a full fieldbus slice. Pairing it with the panel's motor-protection breaker sized to the drive's input current, and keeping the motor cable run short with proper shield grounding at the panel end only, is the layout that keeps common-mode noise away from any adjacent analog cards in the same enclosure.
Sibling within the ACS55 frame
Beyond the ACS55 family, the ACS150-01E-02A4-2 sits at 1.04 kgs and the ACS350-03U-01A2-4 at 0.51 kgs — both are next-tier ABB drive classes with different feature sets, not same-frame alternates, so a cross-shop into either of those is a re-spec rather than a swap.