KDA 3.2-050-3-LP0-U1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.2-050-3-LP0-U1 is a spindle drive from the KDA Spindle Drives series with a rated current of 50 Amps and a DC supply voltage of 300 Volts. It features forced cooling with a mounted heatsink blower supplied by 115V AC and operates within an ambient temperature range of 5 to 45 degrees Celsius. The drive is equipped with a second encoder input for spindle or additional motor feedback and uses a SERCOS interface for speed command values.
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Product Description:
The KDA 3.2-050-3-LP0-U1 spindle drive is produced by Bosch Rexroth Indramat and belongs to the KDA Spindle Drives series. Within the KDA family, it is part of line 3 and version 2, and it is intended to regulate high-speed machining spindles in automated production cells. The unit converts common DC bus energy from an Indramat supply module into variable three-phase output, allowing precise speed and torque control for metal-cutting and grinding applications while helping the spindle respond accurately to changing process loads. This makes the drive suitable for machine tools that require stable spindle behavior during speed changes, heavy cutting passes, and repeated duty cycles.
The drive draws its bus power from a 300 VDC intermediate circuit and can deliver a continuous output of 50 A, giving the power stage enough current for sustained spindle acceleration and steady operation under varying mechanical demand. Velocity commands are accepted over the SERCOS interface, which supports integration with IndraControl systems and third-party CNC controllers. For thermal management of the power semiconductors, the heat sink blower uses a dedicated 115 V at 50–60 Hz auxiliary supply. A second encoder input is available so the controller can process spindle position feedback or an additional motor encoder without external adapters. No additional interface option is included, so the front panel remains dedicated to the standard diagnostic connectors.
Heat is removed by a mounted heat sink blower, and the electronics rely on forced cooling for continuous-duty operation. The unit operates in ambient air from 5 to 45 °C without derating and can be installed at elevations up to 1000 m. Because the blower and cooling channels are integrated, the installation only requires rear-panel clearance instead of separate ducting, which helps keep cabinet layout straightforward in enclosed drive systems. Proper airflow through the rear section also helps the module maintain stable internal temperatures when mounted beside other drives in the same cabinet.
