Product Description:

The SERVOSTAR-403A-S is a digital servo drive produced by Kollmorgen within the S400 Servo Drives series. It conditions and delivers controlled current to matched servomotors, translating motion commands from higher-level controllers into precise torque, speed, and position changes for automated machinery such as pick-and-place axes or carton formers. By housing its power stage, signal processing, and protection circuitry in one compact module, the drive helps streamline cabinet layout while supporting coordinated motion across multiple machine axes in dense automation systems.

The analog command channel is processed at 14-bit resolution, so small voltage changes can be converted into fine torque adjustments. Continuous RMS output is 3 Arms, while short dynamic events can reach 9 Arms without saturation. These currents are pulsed by an output stage that switches at 8 kHz, which helps reduce motor ripple while keeping transistor losses manageable. At rated conditions, thermal dissipation is 30 W, and quiescent dissipation remains 12 W when the axis is enabled but unloaded. The current form factor is 1.01, indicating near-sinusoidal output, and the housing dimensions of 240 mm deep, 230 mm high, and 50 mm wide suit narrow control cabinets.

Load reactance must remain from 12 mH to 75 mH so the current regulators can remain stable without excessive phase lag. The drive front uses screw terminals rated for a Btb/rto contact current of 500 mA, and the holding-brake supply can deliver up to 1.5 A. The housing is rated IP20, so the unit is intended for installation inside a protected enclosure with forced convection. A weight of 1.7 kg reduces stress on panel hardware during mounting, and residual standby heat is carried away through the aluminum chassis to help keep internal components within normal temperature limits during operation.