The Siemens 6SL3120-2TE21-0AA0 is a SINAMICS Double Motor Module, listed as a spare part. It takes a 600 V DC input from a common DC bus and delivers 400 V three-phase AC output at 9 A per channel, for a total of 9 A/9 A across two independent motor axes. Internal air cooling handles the thermal load, and the module ships with the DRIVE-CLiQ cable for communication back to the Control Unit.
The 9 A per channel rating governs motor sizing: each axis can drive a motor drawing up to 9 A at 400 V AC. The 600 V DC input ties directly into a SINAMICS common DC bus — no separate rectification needed on this module. Internal air cooling means the module relies on the cabinet's ambient airflow; if the enclosure is sealed or densely packed, verify the thermal derating curve in the full datasheet.