KDA 2.1-150-3-D0I-U1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 2.1-150-3-D0I-U1 is part of the KDA Spindle Drives series and is a spindle drive with a rated current of 150 Amps. It uses a mounted heatsink blower for forced cooling and runs on a DC supply voltage of 300 VDC. The device features an incremental encoder output and supports digital speed command values with 16 bit parallel input.
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Product Description:
The KDA 2.1-150-3-D0I-U1 spindle drive is produced by Bosch Rexroth Indramat as part of the KDA Spindle Drives series. As a closed-loop servo inverter, the unit regulates high-speed spindle motors used in machining centers and other automated tooling stations by converting a constant DC bus into a variable three-phase output. It provides the motion bandwidth and current control needed for precise cutting, drilling, or grinding tasks where spindle speed must follow numeric controller commands. In machine tools, it is suited to applications where spindle speed must stay stable during changes in cutting load.
This drive operates from a constant DC bus of 300 VDC, and its power stage is rated to deliver up to 150 A of continuous output current to the motor, making it suitable for high-torque spindles. A 16-bit parallel digital interface accepts the speed reference, allowing direct connection to CNC controllers without analog conversion. Heat generated by the power electronics is removed through a mounted heat sink blower, and the blower itself is powered by 115 V/50-60 Hz. Forced cooling keeps the internal components within their thermal limits during continuous spindle operation. The unit does not include a second encoder input, so it relies on the primary feedback channel.
The permitted ambient operating window is 5 to 45 °C, and cooling performance is maintained up to 1000 m above sea level without capacity loss. The drive is Series 2. For external monitoring, an auxiliary connector provides an incremental encoder output so other devices can track actual spindle velocity in real time. This signal can be routed to a control system or diagnostic device that requires feedback from the spindle. Operation outside the stated temperature or altitude range can reduce cooling effectiveness and available output.
Frequently Asked Questions about KDA 2.1-150-3-D0I-U1:
Q: What is the rated current of the KDA 2.1-150-3-D0I-U1 spindle drive?
A: This spindle drive operates with a rated current of 150 A.
Q: What cooling method is used on the KDA 2.1-150-3-D0I-U1?
A: The KDA 2.1-150-3-D0I-U1 uses forced cooling provided by a mounted heatsink blower.
Q: What DC supply voltage does the KDA 2.1-150-3-D0I-U1 require?
A: This model supports a DC supply voltage of 300 VDC.
Q: What is the maximum installation elevation for the KDA 2.1-150-3-D0I-U1 spindle drive?
A: The KDA 2.1-150-3-D0I-U1 can be installed at elevations up to 1000 meters above sea level.
Q: How is the speed command value input to the KDA 2.1-150-3-D0I-U1?
A: The speed command value for this drive is provided via a digital 16-bit parallel input.
