KDA 2.1-100-3-DP0-U1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 2.1-100-3-DP0-U1 is a spindle drive in the KDA Spindle Drives series with a rated current of 100 Amps and a DC supply voltage of 300 Volts. It features forced cooling with a mounted heatsink blower that operates at 115V/50-60Hz, and supports a digital 16 bit parallel speed command value. This drive is suitable for ambient temperatures from 5 to 45 degrees Celsius and can be installed up to 1000 meters above sea level.
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Product Description:
The KDA 2.1-100-3-DP0-U1 spindle drive is manufactured by Bosch Rexroth Indramat as part of the KDA Spindle Drives series. It is a DC-bus-powered converter that energizes machine-tool spindles and maintains commanded speed through encoder feedback. This makes it suitable for milling and turning centers where the spindle must respond accurately to changing load conditions during cutting. In a typical installation, the drive serves as the power stage between the control system and the spindle motor, converting command data into regulated motor current. Its closed-loop arrangement helps keep spindle speed consistent during acceleration, deceleration, and steady-state machining.
This version 2 drive operates from a 300 VDC link and can deliver a continuous output of 100 A to the connected spindle motor. Thermal energy is removed by a mounted heat sink blower that provides forced cooling during operation. The blower is supplied from a separate 115 V 50/60 Hz branch circuit, so airflow can remain available independently of the main DC power stage. Internal logic accepts tachometer or resolver feedback through a dedicated second encoder input, allowing the controller to correct spindle speed as commanded values change. This feedback path supports stable regulation when spindle load varies during cutting, drilling, or similar machining operations.
The command interface uses a digital 16-bit parallel word, so numerical setpoints are transferred without analog drift or offset. Installation is permitted in ambient temperatures from 5–45 °C and at elevations up to 1000 m above sea level before output reduction is required. All communication is handled through the standard parallel port and encoder channels. The digital command method is useful where the spindle reference is generated directly by a CNC or motion controller. An auxiliary connector on the front panel accepts a second encoder, allowing the drive to process spindle-mounted feedback or additional motor feedback for synchronized spindle functions and related axis control.
Frequently Asked Questions about KDA 2.1-100-3-DP0-U1:
Q: What type of cooling does the KDA 2.1-100-3-DP0-U1 spindle drive utilize?
A: The KDA 2.1-100-3-DP0-U1 series features forced cooling using a mounted heatsink blower.
Q: What is the rated current for the KDA 2.1-100-3-DP0-U1?
A: This spindle drive operates with a rated current of 100 A.
Q: What is the DC supply voltage for the KDA 2.1-100-3-DP0-U1 spindle drive?
A: The drive supports a DC supply voltage of 300 VDC.
Q: Does the KDA 2.1-100-3-DP0-U1 model offer a second encoder input?
A: A second encoder input is available for spindle feedback or additional motor feedback.
Q: What is the maximum installation elevation for the KDA 2.1-100-3-DP0-U1?
A: The KDA 2.1-100-3-DP0-U1 can be installed at elevations up to 1000 meters above sea level.
