KDA 2.1-150-3-DPS-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-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.
Internal Product Review
The KDA 2.1-150-3-DPS-U1 spindle drive from Bosch Rexroth Indramat stands out with a rated current of 150 A and a DC supply voltage of 300 VDC, making it suitable for demanding spindle applications. Forced cooling is provided by a mounted heatsink blower running on 115V/50-60Hz, ensuring thermal stability during continuous operation. With a serial interface (RS 232 C) and digital 16-bit parallel speed command, this drive offers flexible integration and precise control.
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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.
