Product Description:

The S446M-CA is a servo drive produced by Kollmorgen as part of the S400 Servo Drives series. It forms the power conversion and current-loop control layer between a motion controller and a three-phase servo motor, turning low-level command signals into regulated motor torque for positioning tasks in automated packaging, assembly, and material-handling equipment. By integrating signal conditioning, power switching, and fault monitoring in a 3 kg housing, the unit supports compact panel layouts while maintaining thermal stability through internal heat sinks and forced-air paths.

The drive delivers a continuous phase current of 6 Arms and can supply up to 12 Arms for short acceleration bursts, allowing headroom for dynamic load changes. Command inputs are digitized with 14-bit resolution, so small position or speed increments are preserved when the control loop is closed. The power section accepts line supplies up to 3 × 400 VAC, and the DC bus is protected by an overvoltage cutout that trips at 750 V, helping protect components during regenerative events. These limits work with the ±10 V analog reference range so the output stage can regulate motor current with low ripple and stable response.

An auxiliary logic rail of 24 V DC keeps the control electronics active during mains outages, while PWM modulation is timed by an 8 kHz output stage clock to balance acoustic noise and current ripple. The power section is intended for loads between 7.5 mH and 40 mH, allowing the same drive to operate high-inertia axes or low-inductance, high-speed motors without hardware changes. Quiescent dissipation is 15 W, and full-load switching adds 60 W that must be removed by cabinet airflow. The housing is 240 mm deep and 267 mm high, and its 100 mm front width helps it fit typical enclosure layouts while leaving room for shielded motor connections.