The Siemens 6SL3121-2TE13-0AA3 is a SINAMICS S120 Double Motor Module in the booksize format, taking 600 V DC input and delivering 400 V 3AC output at 3 A per channel (3 A/3 A). It includes external air cooling, optimized pulse patterns, and support for extended Safety Integrated functions, plus a DRIVE-CLiQ cable. This is a spare part for existing S120 multi-axis systems — not a new-design option, but a direct drop-in for a line that already runs S120 drives.
Deployment context
Booksize construction means it mounts in a standard S120 cabinet with shared DC bus and DRIVE-CLiQ daisy chain. External air cooling requires clearance for airflow — not a sealed enclosure fit. The 3 A per channel suits small servo axes (e.g., feed drives, indexing tables) where two motors share one module. Optimized pulse patterns reduce motor losses and audible noise; extended Safety Integrated functions (STO, SS1, SLS) are available without a separate safety module when the drive controller supports them.