Drive selection memo for a 1.5 kW compact VFD
The Siemens SINAMICS G120C order code 6SL3210-1KE14-3AB1 is a compact variable-frequency drive rated for 1.5 kW output power with a 150% overload capability for 3 seconds — enough to handle short-duration starting torque on a small conveyor, pump, or fan motor without oversizing the drive frame. It accepts 380-480 V 3-phase AC input at 47-63 Hz and carries an integrated EMC filter class A, which means it meets conducted-emission limits for industrial environments without an external filter module — saves a DIN-rail slot and a wiring step. The I/O complement is 6 digital inputs, 2 digital outputs, 1 analog input, and 1 analog output — enough for basic speed reference, run/stop, and fault feedback without an add-on I/O module.
Safety and fieldbus integration
Safe-Torque-Off (STO) is integrated on this drive, eliminating the need for a separate safety relay or contactor in the motor power circuit for safe-stop applications — the safety function is certified and wired directly to the drive's control terminals. Fieldbus is integrated as USS/MODBUS RTU. The drive communicates on the Modbus network at the configured baud rate and node address.