KDA 2.1-150-3-DPS-U1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 2.1-150-3-DPS-U1 is a spindle drive from the KDA Spindle Drives series. It is rated for a current of 150 Amps and operates with a DC supply voltage of 300 VDC. The drive features forced cooling with a mounted heatsink blower and supports operation at ambient temperatures from 5 to 45 degrees Celsius.
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Product Description:
The KDA 2.1-150-3-DPS-U1 spindle drive is built by Bosch Rexroth Indramat for the KDA Spindle Drives series. The product is series 2 and regulates torque and speed of machine-tool spindles through closed-loop current control, serving as the power stage between a DC bus and a high-speed motor in automated machining cells. It plugs into a modular drive rack and interfaces with Indramat supply and controller cards through standardized back-plane connectors. This layout lets the drive operate as part of a coordinated spindle system inside a larger machine platform. Because the unit works from the shared rack infrastructure, it can also be paired with other drive modules used on the same machine.
The drive delivers 150 A of continuous current, so large spindles can be powered without external boosters. Internal converter stages draw from a 300 VDC intermediate circuit that is normally shared across a multi-axis rack. Using a shared intermediate circuit supports common power distribution within the rack. Thermal energy is removed by a mounted heatsink blower that provides forced cooling across the fin stack. The blower receives power from a dedicated 115 V/50-60 Hz branch, which isolates the control electronics from inrush currents and directs warm air toward the top of the cabinet. This airflow arrangement helps limit heat buildup in adjacent modules during prolonged high-current operation.
The drive operates where ambient air remains between 5 to 45 °C and maintains full rating up to 1000 m above sea level. Velocity references arrive through a digital 16-bit parallel port, allowing precise word-level updates from CNC or PLC controllers. This command path suits applications that need fast reference changes from the main control. A serial RS-232-C interface supports parameter loading and real-time diagnostics, while a second encoder socket accepts additional feedback for spindle orientation. The auxiliary feedback input can support synchronized spindle positioning during machine sequences. Configuration data is stored in nonvolatile memory, so operating settings remain available after power is restored and the same control behavior can be retained across repeated machine cycles.
Frequently Asked Questions about KDA 2.1-150-3-DPS-U1:
Q: What is the required AC power source for the heatsink blower on the KDA 2.1-150-3-DPS-U1 drive?
A: The KDA 2.1-150-3-DPS-U1 requires a blower with an AC source of 115V at 50-60Hz for cooling.
Q: What communication interface is available on the KDA 2.1-150-3-DPS-U1 drive?
A: A serial interface (RS 232 C) is available for communication on this spindle drive.
Q: What is the allowable ambient temperature range for the KDA 2.1-150-3-DPS-U1?
A: The KDA 2.1-150-3-DPS-U1 operates within an ambient temperature range of 5 to 45 degrees Celsius.
Q: How is the KDA 2.1-150-3-DPS-U1 spindle drive cooled?
A: This model uses forced cooling via a mounted heatsink blower for temperature management.
Q: What is the rated current of the KDA 2.1-150-3-DPS-U1 spindle drive?
A: The rated current for the KDA 2.1-150-3-DPS-U1 spindle drive is 150 A.
