SE20201-000000 Kollmorgen
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The Kollmorgen SE20201-000000 is part of the S200 Servo Drives series and provides a continuous current of 20 ARMS with a peak current of 40 ARMS for 2 seconds. It offers continuous power of 7.2 kVA at 325 VDC and has a DC rated power of 8.68 kW. The servo drive features a current loop update rate of 62.5 microseconds and an encoder max input frequency of 3 MHz.
Internal Product Review
The SE20201-000000 is a Kollmorgen S200 servo drive with 20 ARMS continuous current and 40 ARMS peak current for strong motion control performance. A 62.5 µs current loop update rate and 0.01% long-term speed regulation support precise response and stable axis control. An excellent drive choice for demanding automation, highlighted by 8.68 kW DC rated power.
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Product Description:
The SE20201-000000 is a digital servo drive manufactured by Kollmorgen within the S200 Servo Drives series. Designed for panel-mounted installation, the unit regulates the torque, velocity, and position of brushless servomotors in industrial automation equipment such as pick-and-place axes, feeders, and cutters. By rectifying three-phase mains power into a regulated DC link and modulating it through high-frequency switching, the drive supplies precise phase currents that synchronize motor motion with controller commands.
At a bus voltage of 325 VDC, the drive can deliver a continuous output current of 20 A RMS, and it sustains transient demands of up to 40 A RMS for two seconds to accelerate loads without stalling. Continuous electrical power is rated at 7.2 kVA, while the DC power capability reaches 8.68 kW, supporting medium-frame motors. Torque commands are refreshed every 62.5 µs within the current loop, and these updates are applied through a pulse-width-modulated bridge that operates at 8 kHz. The high carrier frequency minimizes audible noise and limits ripple to the stated 16 kHz current-ripple band, helping maintain predictable motor temperatures during operation.
Feedback channels accept differential encoder signals at frequencies up to 3 MHz. A regulated 5 VDC, 250 mA supply powers typical incremental or commutation encoders, reducing the need for a separate encoder supply. During operation, internal losses generate 240 W of heat, which must be removed by panel airflow to keep the baseplate below the 90 °C thermal trip point. Protective circuitry disconnects the power stage when the DC bus rises above 430 VDC or falls below the 255 VDC undervoltage threshold, protecting the semiconductors from excessive regenerative voltage and supply interruptions. After the commanded speed stabilizes, long-term velocity error is limited to 0.01%, allowing repeatable operation despite changes in load or temperature. A SERCOS interface updates every 2 ms to relay setpoints and diagnostic data between the drive and the motion controller.
