Drive selection memo — 6SL3210-1KE21-7AC0
The Siemens 6SL3210-1KE21-7AC0 is a SINAMICS G120C compact drive rated for 7.5 kW with 150% overload capability for 3 seconds on 380-480 VAC three-phase input, 47-63 Hz. That 150% headroom handles short-duration peak loads like a conveyor start or a pump breakaway torque without oversizing the drive frame. Integrated filter class A meets EN 55011 conducted emission limits for industrial environments, so no external EMC filter is needed for most installations. Safe Torque Off (STO) is built in, eliminating a separate safety relay for the stop function. The I/O complement — 6 digital inputs, 2 digital outputs, 1 analog input, 1 analog output — covers basic speed reference and feedback without an expansion module. CANopen is on board; no option card required for that fieldbus.