Product Description:

The S72401-US is a servo drive manufactured by Kollmorgen and assigned to the S700 Servo Drives series. Designed as the central power stage in a closed-loop motion axis, the unit converts three-phase mains power into controlled motor voltages and currents for synchronous or asynchronous servo motors used in industrial automation. Through its integrated control electronics, the drive interfaces with PLCs and fieldbus networks to regulate torque, speed, and position in packaging lines, machine tools, and material-handling equipment.

With a rated output current of 24 Arms, the S72401-US can deliver continuous motor current while drawing up to 18 kVA from a three-phase supply in the 208–480 V range. Command signals enter through an analog interface that accepts ±10 V, and the internal IGBT bridge switches at 8 kHz to shape the motor waveform. Under nominal load, the module releases 330 W of heat, while quiescent losses fall to 25 W when the axis is disabled. A single-channel STO circuit interrupts the power stage for emergency stops, the residual DC-link drop is held to 6 V, and the control board monitors thermal rise to prevent overcurrent events.

The housing measures 348 mm in height, 100 mm in width, and 243 mm in depth, allowing cabinet installation beside other S700 modules without extra spacing. The chassis weighs 5.5 kg, which keeps handling straightforward during installation and service. The inverter permits 30 controlled power-ups and shutdowns per hour, and it tolerates peak motor current for 2 seconds to overcome transient loads. When lower acoustic noise is required, the reduced-current mode shifts the carrier to 16 kHz, trading some thermal margin for quieter operation. The drive uses standard PCBs, so the boards are uncoated and the unit should be installed in environments free from conductive dust and high moisture.