The SINAMICS V90 drives are available in two variants, 400 V variant and 200 V variant.
The 200 V variant is available in four frame sizes: FSA, FSB, FSC, and FSD. Frame sizes A, B, and C are used on the
single phase or three phase power network while frame size D is used on the three phase power network only.
The 400 V variant is also available in four frame sizes: FSAA, FSA, FSB, and FSC. All the frame sizes are used on three
phase power network only.