Drive selection memo — 4.0 kW compact cabinet drive
The Siemens 6SL3210-1KE18-8AC1 is a SINAMICS G120C spare-part drive rated for 4.0 kW output power on 380-480 V 3-phase supply, with 150% overload capability for 3 seconds — enough headroom to handle short-duration load spikes from a conveyor start or pump breakaway without tripping. The integrated filter class A keeps conducted emissions within EN 55011 limits for industrial environments, so no external EMC filter is needed for most standard installations. Safe Torque Off (STO) is built in, meeting SIL 3 / PL e for a hardwired safety circuit that removes motor torque without a separate safety relay. The CANopen fieldbus is integrated on the control board, saving a slot and reducing wiring. Mounts in the standard DIN-rail footprint (size FSA: 196 x 73 x 203 mm HxWxD) and runs on an external 24 V control supply. IP20 / UL Open Type means it lives inside a panel, not on the machine frame — plan for enclosure protection against dust and splash.
I/O and fieldbus — what connects where
The I/O interface gives you 6 digital inputs, 2 digital outputs, 1 analog input, and 1 analog output — enough for basic speed reference and run commands without an expansion module. The CANopen interface handles the fieldbus link; no PROFINET or PROFIBUS on this variant, so confirm your controller's network before committing the BOM line.