What the order code actually is
The ACS550-PD-038A-4+B058: The drive weighs 34.02 kg, which puts it in the chassis class that needs a two-person lift or a hoist onto the backplate — plan the spare slot and the uncrate crew accordingly.
Same chassis, different suffix — the 072A-4+L512 peer
The ACS550-U1-072A-4+B055+L512 lists the same 34.02 kg as the ACS550-PD-038A-4+B058, which on this family tracks the same chassis and backplate pattern. The base code, the +B058 vs +B055 option stack, and the +L512 add-on differ, so control terminals and fieldbus option cards must be re-verified against the +B058 nameplate before commissioning — not a free swap.