KDA 2.1-150-3-D0D-U1
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The Bosch Rexroth Indramat KDA 2.1-150-3-D0D-U1, part of the KDA Spindle Drives series, features digital control and operates with a rated current of 150 Amps. This drive is designed for cabinet mounting, includes a SERCOS communication interface, and has an overvoltage category of III.
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Product Description:
The KDA 2.1-150-3-D0D-U1 is a motor drive that is engineered by Rexroth Indramat for high current applications in CNC machine tools and automation tasks. It operates on a nominal DC bus voltage of 300 V and delivers a steady output current of 90 A, while its maximum capability of output current handing goes up to 150 A at ambient conditions.
The KDA 2.1-150-3-D0D-U1 drive gets cool through forced air using an integrated heatsink blower that is powered by 115 V AC at 50 or 60 Hz, to sustain operations under heavy duty cycles. It comes with a vertical panel mounting configuration with overall dimensions of 48.9 cm × 15.0 cm × 39.0 cm and weighs about 17 kg. The unit is presented in a housing that is IP10 rated and therefore it needs to be installed within a protected enclosure to ensure safe operation. It is equipped with multiple terminal connections for input, output and encoder feedback. Its terminal strip X4 is used for digital speed command signals, these include a 16-bit parallel interface that supports data and direction lines. The terminal strip X3 accepts motor encoder signals, it supports both Indramat high resolution encoders and incremental encoders such as ROD 420 or ROD 426. This KDA drive has no auxiliary encoder input.
The KDA 2.1-150-3-D0D-U1 drive supports operating environment range of +5 °C to +45 °C continuous duty, with short term allowance up to +55 °C under derating. It can be used up to 1000 meters altitude without performance reduction and its relative humidity tolerance is up to 70%, non-condensing. The drive connects to a controlled DC supply such as a TVM/TDV supply unit and it provides discrete drive ready as well as fault outputs for monitoring.
Frequently Asked Questions about KDA 2.1-150-3-D0D-U1:
Q: How does the forced-air cooling system improve the reliability of the KDA 2.1-150-3-D0D-U1 drive?
A: The integrated blower maintains consistent airflow across the heatsink, preventing thermal buildup. This ensures stable performance during long production cycles in CNC applications.
Q: Why is a 16-bit parallel interface used for speed commands in the KDA 2.1-150-3-D0D-U1?
A: A 16-bit interface provides fine resolution in speed control. This allows highly precise spindle operation in demanding machining processes.
Q: What is the function of the discrete drive-ready output in the KDA 2.1-150-3-D0D-U1?
A: It signals when the drive is operational and ready for command input. This output helps synchronize the drive with CNC controllers.
Q: Why does the unit require a protected enclosure despite having IP10 housing?
A: IP10 only offers basic protection against accidental contact. A protective cabinet shields the drive from dust, moisture, and mechanical hazards.
Q: What role does the TVM/TDV power supply play with the KDA 2.1-150-3-D0D-U1?
A: The controlled DC supply ensures stable input for the spindle drive. This avoids fluctuations and protects the drive’s internal electronics.
