RD52.1-4B-003-L-NN-NN-NN-FW Bosch Rexroth Indramat
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MPN: R911289491
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The Bosch Rexroth Indramat RD52.1-4B-003-L-NN-NN-NN-FW is a drive controller from the RD 500 Drive Controllers series with a rated power of 3.0 kW. It features field oriented vector control, a built-in brake chopper, and forced air cooling. The drive controller is designed for converter 3 x AC supplies with a voltage range of 380 to 480 volts and includes an integrated mains filter.
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Product Description:
The Bosch Rexroth Indramat RD52.1-4B-003-L-NN-NN-NN-FW is a modular drive controller in the RD 500 Drive Controllers series. It provides closed-loop motor regulation for medium-power axes in automated machinery, where speed and torque must be controlled precisely from the AC mains. The controller sits between a three-phase supply and the motor, shaping current and frequency so that production lines, packaging equipment, and material-handling stations can maintain consistent motion profiles under changing load conditions. It is intended for installations that need repeatable speed changes and stable torque delivery during regular machine operation.
Electrically, the unit accepts a three-phase input in the 380 to 480 V range, so it can be wired directly to common industrial distribution voltages without an external transformer. The front end uses a 3 x AC converter topology and maintains phase symmetry within a ±10 % tolerance, which helps preserve DC-link stability when supply fluctuation is present. Under nominal conditions, the inverter can deliver 3.0 kW of mechanical output to the motor. Regulation is handled by field-oriented vector control, which aligns stator currents with rotor flux for accurate torque response during speed changes, load disturbances, and start-stop cycles.
Thermal performance is handled by forced air cooling, which directs cabinet airflow across the heat sink and removes switching losses from the power section. For rapid deceleration or load back-driving, a built-in brake chopper diverts regenerated energy into a resistor bank, preventing DC-bus overvoltage without requiring an external module. Electromagnetic compliance is improved by an integrated mains filter that reduces conducted emissions on the line side. The controller is part of design generation 1 and is supplied in a basic configuration with the function slots left empty, so the unit focuses on core motion control functions.
Frequently Asked Questions about RD52.1-4B-003-L-NN-NN-NN-FW:
Q: Does the RD52.1-4B-003-L-NN-NN-NN-FW drive controller have an integrated brake chopper?
A: The RD52.1-4B-003-L-NN-NN-NN-FW controller includes a built-in brake chopper for braking energy management.
Q: What voltage range does the RD52.1-4B-003-L-NN-NN-NN-FW support?
A: This drive controller supports a voltage range from 380 to 480 V, making it suitable for standard industrial power supplies.
Q: What control method is used in the RD52.1-4B-003-L-NN-NN-NN-FW?
A: The control type for this model is field oriented vector control, providing precise motor control capabilities.
Q: What is the rated power of the RD52.1-4B-003-L-NN-NN-NN-FW drive controller?
A: The RD52.1-4B-003-L-NN-NN-NN-FW has a rated power output of 3.0 kW for driving connected motors.
Q: How is the RD52.1-4B-003-L-NN-NN-NN-FW drive controller cooled?
A: Forced air cooling is used to maintain safe operating temperatures in this model.
