Product Description:

The KDA 2.1-050-3-DYS-W1 is a Bosch Rexroth Indramat unit in the KDA Spindle Drives series. Designed as a drive module for machine-tool spindles, it converts the DC bus energy supplied by a common power supply into regulated three-phase output. It also governs speed and torque during high-precision cutting, drilling, or grinding tasks on automated production lines.

Electrically, the drive draws power from a DC link at 300 VDC, and its output stage is rated for a continuous motor current of 50 A. An integrated heat sink blower receives single-phase auxiliary power at 220 V/50-60 Hz; this dedicated circuit keeps semiconductor junction temperatures within limits by directing airflow across the fin stack. The thermal management method is forced cooling, meaning airflow is required for full-load operation rather than optional. Within production halls, the unit may be mounted where ambient air lies between 5 to 45 °C, a range that prevents condensation and supports stable operation under typical workshop conditions.

In addition to thermal and power provisions, installation parameters and feedback channels define its system role. The module can be installed up to 1000 m above sea level without derating, ensuring standard performance in most factory elevations. Speed references reach the controller through a 16-bit digital parallel command bus, giving fine resolution for closed-loop spindle regulation. For diagnostics or parameter loading, an RS-232 C serial interface is provided, allowing direct connection to a programming terminal. When machines require redundant position verification, the housing also presents a second encoder input that can be wired in parallel with the primary sensor to improve reliability during high-speed machining. This arrangement helps maintain precise position feedback even when vibration or tool impact could disturb the standard feedback path.