Product Description:

Kollmorgen's CR10251 is an AC drive from the CD Servostar CD Drives series and is listed in the manufacturer’s Compact Drive product family. In an automation cell it receives velocity and position set-points through a SERCOS fiber loop, converts them into three-phase power for a matched servo motor, and returns resolver-based feedback to the controller. The design isolates low-level logic on a 230 VAC auxiliary supply so control remains active during power events on the main line. This arrangement streamlines cabinet wiring and helps coordinate multiple axes on the factory floor.

The mechanical envelope of the drive is fixed for tight cabinet layouts. The housing stands 256.0 mm tall, is only 99.1 mm wide, and extends 163.0 mm deep, permitting side-by-side stacking with minimal air gap. At a mass of just 2.69 kg it can be fastened directly to a DIN rail or panel without reinforcement. Internally, an IGBT bridge switches at 8 kHz, providing smooth current control while limiting audible noise. The power section accepts a three-phase 230 VAC line and shares a common DC bus with neighboring drives; resolver signals are processed on board through the SERCOS option card.

Thermal and electrical safeguards complement the compact mechanics. The continuous output capability reaches 10 A rms, but a short-term reserve of 20 Arms for 500 ms is available for acceleration or shock loads. During such peaks the power stage dissipates up to 132 W, so airflow across the heat sink must be maintained. Over-voltage protection trips at 430 VDC, while an 80 °C temperature limit and a 90 VDC under-voltage threshold shut the unit down before component stress occurs. Together, these limits ensure stable operation when the drive is wired to the three-phase supply described earlier.