KDA 3.3-150-3-A0D-U1

The Bosch Rexroth Indramat KDA 3.3-150-3-A0D-U1 from the KDA Spindle Drives series by Bosch Rexroth Indramat is a robust main spindle drive controller engineered for demanding speed and position control applications. This drive delivers a rated current of 150 A with a continuous current rating of 90 A, while operating on a rated voltage of 300 V DC bus. Forced cooling is provided via a built-in blower that requires a rated connection voltage of AC 50–60 Hz and is thermally bonded to the heatsink for efficient heat dissipation. Integration is facilitated through an analog ±10 V speed command interface that supports precise command value inputs.

Reliability and interfacing are central to the controller’s design: the KDA 3.3-150-3-A0D-U1 carries a Product designation: KDA, Series designation: 3, and Design designation: 3, ensuring compatibility with standard mechanical and electrical layouts. Auxiliary encoder input is not supported (Aux. Encoder Input: WithoutAux. Interface1), but a dedicated 16-bit parallel digital command interface expands control flexibility. A serial interface permits parameter storage and retrieval on external computers, and firmware is maintained on an AS programming module. All operating parameters and commissioning adjustments are managed via the front-mounted control panel for rapid set-up and diagnostics.

Encased in an IP10-rated enclosure, the drive is intended for installation within industrial cabinets, safeguarding sensitive electronics from debris while requiring trained personnel for service. Prior to any maintenance, the voltage must be fully discharged to eliminate electric shock risk, and the main power supply should be switched off. With its precise current-handling capabilities and integrated cooling system, the KDA 3.3-150-3-A0D-U1 offers a dependable solution for high-performance spindle control in machine tools and CNC automation environments.