The Siemens 6SL3056-4AA31-4AV0 is an ammeter purpose-built for the SINAMICS V50 drive family, spanning 0 to 140 A with a 0-20 mA analog input. That input signal is standard for drive current transducers — loop-powered, so no separate supply needed on the sense side. The 0-140 A full scale matches the output range of the V50's current transformer interface, making it a direct panel fit for that series.
Group Code R220 and Product Group 4923 are Siemens internal classification tags — R220 typically corresponds to SINAMICS V50 accessories. The packaging unit is one piece.
