Product Description:

Bosch Rexroth Indramat builds the KDA 3.2-050-3-LYI-W1 for the KDA Spindle Drives series. Classified as a spindle drive, it regulates high-speed machine tool spindles by converting a constant DC bus into controlled three-phase power while exchanging velocity data over a fieldbus link. The 3.2 designation indicates the third series and second revision of this drive, which helps identify it within multi-axis machining systems.

The drive draws energy from a 300 VDC link and can deliver up to 50 A of continuous output current to the motor windings, allowing large-frame spindles to reach rated torque without derating. Thermal management relies on a mounted heat sink blower. Air is pushed through the fin stack by forced cooling so the power section maintains safe junction temperatures during long duty cycles. The control electronics remain operational from 5 to 45 °C, which matches the ambient range normally found in enclosed CNC cabinets. A SERCOS-formatted speed command is accepted through the fiber link, and internal logic forwards real-time position data to the controller. The unit also supports direct feedback redundancy through a second encoder connector and a synchronized trigger input for applications that compare two transducers.

The heat sink blower runs from a single-phase supply of 220 V/50-60 Hz, which simplifies power routing inside the panel. Communication is supported by a SERCOS interface telegram stream, while an auxiliary channel provides an incremental encoder output for downstream displays or external axis controllers. Installation is allowed up to 1000 m above sea level without current reduction, and altitude derating tables apply beyond that point. These interface options provide multiple signal paths for monitoring and control during variable-speed machining tasks.