Product Description:

The DKS01.1-W050A-RL05-01-FW digital servo drive is built by Bosch Rexroth Indramat within the DKS Intelligent Digital Servo Drives series. As an axis controller for brushless servomotors, it converts three-phase mains power into regulated DC and pulse-width-modulated outputs that control speed and torque in automated machinery. Internal bleeder circuitry and resolver feedback processing support coordinated motion in packaging lines, handling robots, and other general industrial equipment where stable axis response is required. This arrangement lets the drive manage acceleration, running speed, and braking from one compact housing.

On the power side, the unit accepts a three-phase supply of 3x 230 V AC within a ±10% tolerance and operates on grid frequencies of 50–60 Hz. Under rated conditions, it draws a continuous line current of 50 A, which the converter rectifies to a stabilized bus of 300 V DC for the inverter stage. The AC input is processed internally before the inverter stage produces the commanded motor waveform. The output transistors switch at 4 kHz, balancing current ripple with switching losses during normal operation. When the driven axis is heavily loaded, the drive may demand up to 9.5 kVA from the mains. Resolver feedback terminals send rotor position to the control logic, heat is removed by forced convection, and the enclosure has an IP10 rating. The noise emission is standard, which suits typical cabinet installations.

The internal braking resistor manages regenerated energy during deceleration and reversing. It can absorb 0.35 kW continuously and withstand peaks of 9.4 kW for short stopping events, which helps limit DC-bus rise. At maximum duty, the electronics dissipate 305 W of heat, so the ambient temperature must remain below 55 °C before derating is required. Thermal limits matter during frequent starts and stops because both the inverter and braking circuit release heat inside the cabinet. Operation is permitted up to 1000 m elevation without loss of performance. The drive is version 1, and its resolver-based control supports consistent motor feedback handling during axis operation.