Product Description:

The KDA 3.2-100-3-L00-U1 is a spindle drive module produced by Bosch Rexroth Indramat for the KDA Spindle Drives series. It converts a regulated DC bus into three-phase motor power while exchanging speed data with a CNC controller. By integrating drive electronics, cooling hardware, and a communication link in one chassis, the product simplifies cabinet layout in machining systems where spindle speed regulation is required. This arrangement supports controlled spindle operation in machine tools that need steady speed during cutting cycles and rapid response to CNC commands. The 3.2 code indicates Series 3 and Version 2, and the unit remains parameter-compatible with matching power supplies.

Electrical loading limits start with a rated output current of 100 A, allowing the drive to energize medium-to-large induction or synchronous spindles without derating. Its internal power stage is fed from a 300 VDC intermediate circuit that typically comes from a shared supply module. Thermal management uses a mounted heat-sink blower whose motor requires an external supply of 115 V at 50/60 Hz. The housing uses forced cooling, so air must move freely across the heat-sink fins to keep semiconductor temperatures within range during sustained spindle duty. Continuous service is permitted at ambient temperatures from 5 to 45 °C. This cooling method depends on clear airflow paths around the module rather than passive heat dissipation alone.

Installation is limited to elevations of no more than 1000 m above sea level, because lower air density reduces cooling effectiveness. Speed references are transmitted through the SERCOS interface, which provides deterministic communication without analog drift and supports direct coordination with compatible CNC controls. The unit has no additional interface option, so any fieldbus expansion or relay functions must be provided elsewhere in the cabinet. As a result, cabinet-level networking and auxiliary signaling stay separate from the spindle power section.