The Siemens 6SL3210-1KE12-3UB1 is a SINAMICS G120C compact variable-frequency drive rated for 0.75kW output power on a 380-480V 3-phase supply (+10/-20%, 47-63Hz). Its 150% overload capability for 3 seconds handles short-duration peak loads on pumps, fans, or small conveyors without oversizing the frame. The drive integrates Safe-Torque-Off as standard, which removes motor torque without disconnecting power — a key feature for safety circuits that must meet SIL 3 / PL e without external contactors.
The I/O interface provides 6 digital inputs, 2 digital outputs, 1 analog input, and 1 analog output — enough for basic speed/start commands and feedback on a standalone machine. Fieldbus is USS/MODBUS RTU onboard, so it connects directly to a PLC or HMI over RS-485 without an option card. The external 24V supply keeps the control logic alive even when the main power is off, preserving the bus communication and fault memory.