Product Description:

The KDA 3.2-050-3-LQS-U1 belongs to the KDA Spindle Drives series manufactured by Bosch Rexroth Indramat. As a spindle drive, it supplies regulated three-phase power to high-speed machining spindles and converts motion commands from the CNC or PLC into precise torque and speed profiles. Its designation indicates a Series 3, Version 2 unit designed for multi-axis automation racks that operate from a common DC bus. That configuration allows the drive to share DC-bus energy with companion modules while remaining dedicated to spindle control in compact rack layouts.

This drive draws its logic and power-stage energy from a DC bus voltage of 300 VDC and can deliver up to 50 A of continuous output to the spindle motor. A dedicated heat sink blower is powered from an auxiliary supply rated at 115 V/50-60 Hz, which keeps cooling independent of the main bus. The permissible ambient operating range is 5 to 45 °C, so enclosure airflow must keep inlet air within that range during operation. Installation altitude is limited to 1000 m above sea level, and reduced air density above that height can lower cooling performance.

Forced convection is provided by a mounted heat sink blower that pulls air across the power modules, and this airflow provides forced cooling for the internal power section. Velocity references arrive digitally over a SERCOS interface, allowing the spindle axis to exchange cyclic command and feedback data with other drives on the same fiber-optic ring. An optional RS-232C serial port can be used for parameter access and diagnostic functions such as reading status values or trace data. This combination of cooling and communication features suits the drive for machine-tool applications where stable spindle speed, coordinated axis behavior, and dependable thermal management are required during continuous operation in demanding production equipment.