KDA 2.1-050-3-L00-U1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 2.1-050-3-L00-U1 spindle drive is part of the KDA Spindle Drives series and features a rated current of 50 Amps with a DC supply voltage of 300 VDC. It uses forced cooling with a mounted heatsink blower that requires an AC source of 115V at 50-60Hz, and operates in ambient temperatures from 5 to 45 degrees Celsius.
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Product Description:
The KDA 2.1-050-3-L00-U1 is a drive controller produced by Bosch Rexroth Indramat for the KDA Spindle Drives series. It installs in machine tool cabinets to regulate spindle speed and torque through closed-loop interaction with an inverter and motor feedback. By converting regulated DC bus energy from the supply unit into three-phase output for a machining spindle, the module forms an essential link between numerical control commands and the cutting process.
The drive shares the KDA series electrical platform and draws its power from a stabilized bus at 300 VDC; this value sets the required supply module and the maximum reachable spindle voltage. Its hardware revision is identified as series 2, aligning connections with later modules. Under continuous duty, the power stage can deliver 50 A of phase current, which sets the thermal limit for motor selection and cable sizing. Heat generated in the power electronics is extracted by a mounted heatsink blower, and the assembly operates with forced cooling, so airflow is controlled independently of spindle load to keep semiconductor junctions below their rating. The blower itself is fed from an auxiliary line of 115 V at 50–60 Hz, avoiding extra converters. Reliable function is maintained within an ambient range of 5 to 45 °C, which suits typical shop-floor conditions.
For installations situated up to 1000 m above sea level, the drive retains its published output without derating. Speed reference data are received digitally through the SERCOS interface, allowing the numerical control to command precise RPM steps without analog drift. Option slots remain unused, a configuration indicated by no additional interface option, and the encoder board presents a single feedback channel, so it does not have an additional input for a second transducer. This arrangement keeps wiring straightforward and reduces cabinet space. Its classification as a spindle drive places the unit specifically in high-frequency machining head applications rather than generic servo axes.
Frequently Asked Questions about KDA 2.1-050-3-L00-U1:
Q: What cooling method is used in the KDA 2.1-050-3-L00-U1 spindle drive?
A: The KDA 2.1-050-3-L00-U1 uses a forced-cooling system with a mounted heatsink blower for reliable thermal management.
Q: What is the rated current for the KDA 2.1-050-3-L00-U1 spindle drive?
A: This drive operates with a rated current of 50 A, supporting demanding spindle motor applications.
Q: What are the AC power requirements for the heatsink blower on this model?
A: The AC source for the heatsink blower requires 115V at 50 to 60 Hz for operation.
Q: Which speed command interface does the KDA 2.1-050-3-L00-U1 use?
A: The KDA 2.1-050-3-L00-U1 supports speed command input via the SERCOS interface.
Q: What is the maximum permissible installation elevation for the KDA 2.1-050-3-L00-U1?
A: This drive is suitable for installation up to 1000 meters above sea level.
