The Siemens 6SL3210-1KE18-8UB0 is a SINAMICS G120C compact drive rated for 4.0 kW at 380-480 VAC 3-phase, with a 150% overload capability for 3 seconds. It integrates Safe-Torque-Off and a USS/MODBUS RTU fieldbus interface, all in an IP20/UL Open Type enclosure (FSA frame, 196x73x203 mm HxWxD). The I/O complement — 6 digital inputs, 2 digital outputs, 1 analog input, 1 analog output — covers typical pump, fan, and conveyor control without an expansion module.
The 4.0 kW rating at 380-480 VAC is the continuous motor power under typical variable-torque loads. The 150% overload for 3 seconds handles short-duration starting or load spikes — enough for a centrifugal pump or fan, but not for high-inertia loads requiring sustained overload beyond that window. Safe-Torque-Off (STO) is integrated, so no separate safety relay is needed for the stop function in a Category 3 / PL d safety circuit.
Panel Integration
The USS/MODBUS RTU port uses the standard RJ45 connector; wire the bus termination resistor at the last drive on the segment.