What it is and what it does
The Siemens 6SL3120-2TE21-0AB0 is a SINAMICS Double Motor Module — a spare-part drive module feeding two independent motor axes from a common 600 V DC bus, delivering 400 V 3 AC at 9 A per channel. Internal air cooling keeps the module compact enough for a standard cabinet, and the DRIVE-CLiQ cable is included so it plugs directly into the SINAMICS control unit without extra ordering.
Lifecycle and sourcing reality
For a BOM freeze or capital project, this part is available through independent distribution, quoted to order against an RFQ. No last-time-buy pressure, but volume pricing and lead time should be confirmed at quote time.
What the ratings mean for fit
The 9 A per channel is the continuous output rating per axis at 400 V 3 AC — sized for two small motors, or one larger axis if you parallel the outputs. 600 V DC input means it connects to a common DC bus from a regulated SINAMICS supply — not a direct line feed. That DC bus architecture is standard in multi-axis systems where regenerative energy is shared across axes.
Cabinet integration notes
Internal air cooling avoids the plumbing of external heat exchangers, but the module still needs clearance above and below for natural convection. The painted enclosure and included DRIVE-CLiQ cable mean it arrives ready to slide into the SINAMICS rack — no field-assembly of connectors or cable glands for the feedback link.