The 5.5 kW G120X that hands the drive to the shift: the BOP-2 panel on the FSC frame, 230 V supply, 22.8 A nominal, 29.7 A max, unfiltered, IP20. The order code ends in B for the panel and opens its suffix with 0, leaving the DC-link option off the order.

Where does the panel-only 5.5 kW fit in the matrix?

Between the plain and the fully loaded. The two 0-prefix plain drives, the 0UP0 and the 0UF0, carry no panel - commissioning happens through a PC, and every later fault readout does too. The 1UB0 carries the panel and the DC terminals together, priced and wired for stations that need both. This drive is the middle: the BOP-2 for the people standing next to the machine, without the DC terminals a station with short motor cables has no use for. For a pump house where staff start, stop and read faults at the drive but the motor sits close, this is the combination that spends nothing on the option it will not use.

Is 5.5 kW the right step - or 4 kW?

The boundary between 4 kW and 5.5 kW is where the frame grows on a 230 V supply: the 4 kW 3YC20 sits in the 100 mm wide FSB, this drive in the 140 mm wide FSC. Current moves with it: 22.8 A nominal replaces the 18.1 A of the FSB step, and 29.7 A sits on top for peaks. A station that outgrows 18.1 A has no middle option: the next stop is this frame, and the cabinet loses 40 mm of width per drive. When the load fits 18.1 A, the FSB 4 kW keeps the row narrower; when it does not, this is the drive the sizing leads to.