Product Description:

The KDA 3.2-050-3-LYS-W1 is a spindle drive manufactured by Bosch Rexroth Indramat and belongs to the KDA Spindle Drives series. As a spindle drive, it converts a regulated DC supply into variable-frequency output for high-speed machine-tool spindles in automated production cells. The unit is version 2 of series 3, receives DC-link energy from a shared bus, and returns speed feedback to the master controller through integrated encoder channels. This arrangement supports spindle applications that require controlled speed regulation during changing machining loads.

It draws a continuous rated output of 50 A from the shared DC link at 300 V. Speed commands arrive over the SERCOS fiber-optic interface, while a serial port that follows the RS-232-C protocol handles parameterization and diagnostics; an auxiliary encoder and synchronous input are also available for a second sensor. Thermal management relies on a mounted heat sink blower supplied with 220 V AC at 50–60 Hz, and it moves 32 L/s of cooling air through forced-cooling passages in the housing. This cooling method helps the drive remove heat during sustained spindle operation. For fastening, the stay bolts must be tightened to 5 Nm, and the protective earth conductor must use at least 10 mm² of copper.

The housing has an IP10 rating, which provides basic protection against contact with internal parts. The drive weighs 16.6 kg and may be installed up to 1000 m above sea level without performance loss. During operation, it maintains full current from 5 °C to 45 °C and can be derated linearly to 55 °C if higher cabinet temperatures are expected. For storage, it tolerates temperatures from -30 °C to +85 °C. Blower power is supplied from a dedicated source for the heat sink, ambient humidity should remain within standard cabinet conditions, and ground paths, encoder wiring, and SERCOS fiber must be routed so they do not obstruct the forced-cooling air stream.