KDA 2.1-150-3-D0S-U1 Bosch Rexroth Indramat
Wake Industrial LLC is not an authorized distributor of this product.
Wake Industrial LLC is not an authorized distributor of this product.
The Bosch Rexroth Indramat KDA 2.1-150-3-D0S-U1 is a spindle drive from the KDA Spindle Drives series. It operates with a rated current of 150 Amps and requires a DC supply voltage of 300 VDC. The drive uses forced cooling with a mounted heatsink blower powered by a 115V AC source, and supports a serial RS 232 C interface for communication.
Internal Product Review
The KDA 2.1-150-3-D0S-U1 spindle drive from Bosch Rexroth Indramat delivers a rated current of 150 A and operates on a 300 VDC supply, making it ideal for demanding spindle applications. The integrated forced cooling system with a mounted heatsink blower ensures reliable thermal management in environments up to 45°C. The addition of a serial RS 232 C interface supports flexible system integration, making this drive a dependable choice for high-performance operations.
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Product Description:
The KDA 2.1-150-3-D0S-U1 spindle drive is manufactured by Bosch Rexroth Indramat and belongs to the KDA Spindle Drives series. Designed for high-speed machining centers, it converts controlled power from a common DC bus into adjustable three-phase output for motor-spindle assemblies that require accurate acceleration and speed regulation. In an automation cell, the drive works as the axis amplifier that receives digital speed references from the CNC controller and regulates current so torque production stays consistent throughout the machining cycle. This arrangement lets the spindle respond smoothly during ramp-up, cutting, and deceleration when the commanded speed changes under varying load conditions.
The drive is supplied from a common bus at 300 V DC, so its inverter stages are built for that nominal link voltage. Motor phase current can reach a continuous 150 A, allowing the unit to energize large spindle motors without external boosters. An integrated blower requires an auxiliary supply of 115 V at 50/60 Hz, which keeps heatsink airflow independent of the DC bus. Speed commands arrive through a 16-bit parallel digital channel, giving the controller fine setpoint resolution for spindle operation. Diagnostic and parameter data can be exchanged over an additional RS-232C serial interface, allowing connection to a laptop or HMI for setup and diagnostics.
The thermal design uses a heatsink-mounted blower that provides forced cooling, directing air across the power semiconductors instead of relying on cabinet convection. This airflow helps remove switching and conduction heat during sustained spindle duty. Stable operation is specified for ambient temperatures from 5 to 45 °C, and installation is permitted up to 1000 m above sea level before output derating becomes necessary. This version omits a secondary encoder channel, so applications that need only a single feedback loop can wire the spindle encoder directly and keep the feedback arrangement simple.
