KDA 3.2-050-3-A0S-U1

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The KDA 3.2-050-3-A0S-U1 is a cabinet-mounted spindle drive module with a rated current of 50A and IP20 protection. Manufactured by Bosch Rexroth Indramat, it belongs to the KDA Spindle Drives series and operates on a 3-phase 380-480 V AC input. It features air cooling, 3.2 kW power output, and supports encoder feedback.

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Product Description:

The KDA 3.2-050-3-A0S-U1 is a spindle drive unit. It is from the series of KDA Spindle Drives>. The model integrates digital monitoring and is tailored for demanding spindle positioning.

The < enables controlled digital operation of 2AD asynchronous and 1MB frameless spindle motors. It operates on a 300 VDC bus. The cooling system uses pushed air from an external heatsink blower. The airflow is 32 liters per second at 30 Pa pressure. It is designed by Bosch Rexroth Indramat for high-precision motion control applications. The cooling blower operates on 115 V AC at frequency of 50–60 Hz. It has a rated current of 50 A and can output 35 A continuously. The drive's internal and external heat dissipation are around 200 and 400 W respectively. The serial communication is handled using a 25-pin RS232C interface. Control inputs and outputs are connected via a 37-pin standard port. A 15-pin interface is used to receive motor feedback, and temperature is monitored via a specialized NTC thermistor input. The device has a 9-pin interface. The unit does not support an auxiliary encoder input. The programming module maintains important parameters and the model allows for integrated spindle and C-axis operations with a resolution of ≤1/360,000 revolution. It is intended for vertical installation orientation and is suitable for enclosed machine environments. Ambient temperature operation is supported from +5 °C to +45 °C, and up to +55 °C with degraded performance. It has protection class IP10 under DIN 40 050The main device weights 16.6 kg, with the blower unit and mounting kit weighing 4.2 kg and 1.7 kg, respectively.

The Bosch Indramat ensures that KDA 3.2-050-3-A0S-U1 delivers robust control under industrial conditions. It has a humidity class F under DIN 40 040. Up to 1000 meters above sea level the unit remains stable. It supports seamless installation with dedicated ports and preconfigured modules.

Connection Type
Servo Drive Module
Continuous Current
50 A
Continuous Current Output
35 A
Cooling Method
Air cooled
DC Bus Voltage
300 VDC
Feedback
Supports encoder feedback
Input Voltage
3-phase, 380-480 V AC
Mounting
Cabinet mounting
Operating Temperature Range
0°C to 45°C
Peak Current
100 A
Power Output
3.2 kW
Protection Class
IP20
Rated Current
50 A
Rated Current
50 A
Weight
Approx. 12 kg
  • KDA 3.2 050 3 A0S U1
  • KDA 3.20503A0SU1
  • KDA- 3.2-050-3-A0S-U1

Frequently Asked Questions about KDA 3.2-050-3-A0S-U1:

Q: How does the RS232C serial interface enhance configuration in KDA 3.2-050-3-A0S-U1?

A: It allows parameter storage and easy diagnostics via standard PC connectivity. This simplifies maintenance and drive setup without needing proprietary software.

Q: How does KDA 3.2-050-3-A0S-U1 ensure signal clarity with analog ±10V input?

A: The analog input provides smooth and interference-resistant speed control. It ensures precise command interpretation for critical spindle operations.

Q: What is the significance of having no auxiliary encoder input in this model?

A: It simplifies installation and reduces wiring when additional feedback isn't required. The drive relies solely on primary motor feedback channels.

Q: How does the high-resolution rotor monitoring in KDA 3.2-050-3-A0S-U1 support accuracy?

A: It detects minute movements and supports tight position control loops. This enhances precision during C-axis operations and tool changes.

Q: Why is a 115V AC blower supply chosen for this unit?

A: It aligns with North American power standards for industrial environments. This makes the KDA 3.2-050-3-A0S-U1 suitable for common automation systems.


Internal Product Review

  • ‘‘The KDA 3.2-050-3-A0S-U1 is a digitally controlled spindle drive from Bosch Rexroth Indramat. It offers 50 A rated current, 115V blower supply, and RS232C communication. This drive is commonly used in CNC machining centers for spindle control and C-axis positioning precision.’’

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