KDA 2.1-150-3-L0S-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 2.1-150-3-L0S-W1 is a spindle drive in the KDA Spindle Drives series and is rated for a current of 150 Amps with a 300 VDC supply voltage. It utilizes forced cooling with a mounted heatsink blower operating at 220V, and features a SERCOS interface for speed command value along with a serial RS 232 C interface.
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Product Description:
The KDA 2.1-150-3-L0S-W1 spindle axis controller is produced by Bosch Rexroth Indramat for the KDA Spindle Drives series. It acts as the interface between a machine’s numerical controller and a high-speed spindle motor, converting the shared DC bus into precisely regulated three-phase output. By maintaining constant torque and speed, the unit helps preserve surface finish and cutting accuracy during machining operations. This product is the second design release in the family, and its product type is intended for high-speed spindle motion rather than general-purpose servo control. This operating role makes it suitable for machine tools that depend on stable spindle behavior during repeated acceleration and deceleration.
The drive draws its logic and output power from a DC bus rated at 300 VDC, and it can deliver a continuous armature current of 150 A to the connected motor. Command values arrive through a SERCOS interface, allowing time-synchronized speed setpoints from the motion controller, while parameter access and diagnostics are available through the serial interface (RS-232-C) on the front panel. A dedicated heat sink blower runs from an auxiliary supply of 220 V at 50–60 Hz, helping maintain stable semiconductor temperature during heavy duty cycles. The blower, the IGBT bridge, and the control electronics work together so overload response and current limiting remain suited to spindle operation.
Thermal management relies on a mounted heat sink blower that uses forced cooling to pull air directly across the fins, allowing full output anywhere from 5 to 45 °C ambient. Installations are permitted up to 1000 m above sea level without derating, although reduced load or additional airflow is recommended at higher elevations. Because the hardware omits a second encoder connection, feedback from only one motor transducer is accepted, which simplifies wiring when dual-channel position verification is unnecessary. This arrangement supports straightforward integration in spindle systems that use a single feedback device for closed-loop control.
Frequently Asked Questions about KDA 2.1-150-3-L0S-W1:
Q: What is the rated current output of the KDA 2.1-150-3-L0S-W1 spindle drive?
A: The KDA 2.1-150-3-L0S-W1 spindle drive offers a rated current of 150 A.
Q: What DC supply voltage is needed for the KDA 2.1-150-3-L0S-W1?
A: This spindle drive requires a 300 VDC supply voltage for operation.
Q: How is the KDA 2.1-150-3-L0S-W1 spindle drive cooled during operation?
A: The KDA 2.1-150-3-L0S-W1 is equipped with a mounted heatsink blower for forced cooling.
Q: What is the permissible ambient temperature range for the KDA 2.1-150-3-L0S-W1?
A: This model has an ambient temperature range of 5 to 45 degrees Celsius.
Q: What power supply does the heatsink blower on the KDA 2.1-150-3-L0S-W1 require?
A: The AC source for the heatsink blower is 220V at 50-60Hz.
