Product Description:

The KDA 2.1-100-3-LYS-U1 is a spindle drive module from Bosch Rexroth Indramat that belongs to the KDA Spindle Drives series. As a spindle drive, it supplies regulated three-phase power to machine-tool spindles, enabling rapid acceleration, constant surface speed control, and precise positioning in CNC machining centers and grinding lines. Built on the series 2 platform, it connects directly to the DC bus of an Indramat supply unit and supports motion-control loops that rely on real-time velocity and angle feedback. In machine tools, that control helps the spindle move smoothly between roughing passes, finishing passes, and orientation steps without losing response.

The drive delivers a continuous output of 100 A while drawing energy from a common bus rated at 300 VDC. This combination supports sustained spindle torque during demanding cutting duty and suits systems that use a shared DC bus architecture. A heatsink blower powered by 115 V 50–60 Hz mains cools the internal IGBT stack, and the thermal design uses forced cooling to maintain stable operation during extended machining cycles. Speed commands are accepted over a SERCOS interface, allowing deterministic communication with the machine controller and consistent response during high-speed contouring, spindle synchronization, and orientation control.

Environmental limits place the drive in workspaces kept between 5–45 °C, and it may be installed up to 1000 m above sea level without derating. Parameter loading and diagnostic readout are available through a RS-232-C service port for local setup and troubleshooting. The cooling assembly uses a mounted heatsink blower integrated on the rear panel, so enclosure layout only needs straight airflow channels rather than complex ducting. A secondary encoder input with synchronous-pulse capability supports spindle orientation for tool change and tapping cycles, and the built-in serial and SERCOS resources remove the need for add-on interface cards.