Product Description:

The DDS02.1-W025-RA02-02-FW is a digital AC servo drive controller produced by Bosch Rexroth Indramat for the DDS Drive Controllers series. It converts command signals into phase-regulated motor currents so that connected motors respond accurately to commanded speed and position changes. The unit can be used with synchronous or asynchronous servomotors in automated machinery and material-handling cells. Because the controller closes the motor current loop at the drive level, the machine control can focus on motion commands rather than direct power conversion. This makes it suitable for axes that need controlled acceleration, steady running, and repeatable stopping behavior.

This controller communicates with higher-level devices through an analog interface, letting PLCs transmit continuous setpoints without fieldbus adapters. It delivers a rated output of 25 A, which is the maximum continuous current the power stage supplies to the motor windings during normal duty cycles. Its enclosure has an IP20 rating, so live electrical parts are protected against finger contact, but the unit still requires installation inside an enclosed cabinet. Reliable operation is permitted within an ambient range of 0–45 °C. Within that temperature window, the drive does not require derating, and cabinet airflow remains the main factor in thermal control. That arrangement works well in cabinet-based systems where surrounding hardware provides physical shielding and organized cable routing.

Motion feedback is processed through resolver feedback, which provides rotor angle data with an absolute electrical reference even during power interruptions. Heat is removed by air from inside the control cabinet, so the ventilation path inside the enclosure directly affects operating temperature. When inactive, the assembly tolerates storage between −30–85 °C, which supports shipment or spare storage in non-climate-controlled spaces. Installation altitudes up to 1000 m above sea level are permitted without output reduction. This feedback method is commonly used where stable commutation and dependable position information matter more than very high encoder resolution.