The 5.5 kW step of the G120X at 230 V: the FSC frame, 22.0 A LO nominal and 29.7 A max, rated 5.5 kW for quadratic pump and fan duty and 4 kW for linear loads. This variant carries the DC terminals - the 1 in the order code - for the du/dt filter that long motor cable runs ask for, under the F PROFINET ordering designation.

Which loads fit the 5.5 kW LO rating?

Fans and compressors on a 230 V supply that run mostly at partial load sit in the LO window: 110% for 60 s in a 300 s cycle, with 29.7 A available for short peaks. The quadratic torque of a fan - load growing with speed squared - rarely presses the drive hard after ramp-up. A load rated for continuous 150% duty is an HO application: the same hardware is then rated 4 kW, and the selection should be checked against that line before the order is placed.

Why would a 5.5 kW drive carry DC terminals?

The du/dt filter story is not reserved for the larger steps. Where the fan wall or compressor sits a long cable run from the panel, the switching edges reach the motor as voltage spikes unless a du/dt filter flattens them, and the filter connects through the DC-link terminals. The 0-prefix 5.5 kW drives do not have these terminals, so adding the filter later means changing the drive - specifying the 1-prefix version keeps the long-cable option open from day one.