RD52.1-4B-045-D-NN-FW Bosch Rexroth Indramat
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MPN: R911203500
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The Bosch Rexroth Indramat RD52.1-4B-045-D-NN-FW is a drive controller in the RD 500 Drive Controllers series with a rated power of 45 kW. It supports a voltage range of 380 to 480 V with a tolerance of ±10% and features field oriented vector control. This unit includes a built-in brake chopper, an integrated mains filter, and uses a plug-through cooler for cooling.
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Product Description:
The RD52.1-4B-045-D-NN-FW drive controller is built by Bosch Rexroth Indramat and belongs to the RD 500 Drive Controllers series. As a converter-based AC drive, it sits between the plant’s three-phase supply and a motor, performing coordinated voltage and frequency modulation so automated machinery can start smoothly, hold speed under disturbance, and stop on command. This first-generation unit is intended for cabinet installation and interfaces with higher-level PLCs through standard analog or bus commands, keeping the power electronics centralized while supporting controlled motor operation. It is suited to applications where a fixed cabinet location is preferred over motor-mounted electronics, including process lines, conveyors, and general industrial machinery.
At the power terminals, the unit accepts a three-phase AC converter feed from 380 to 480 V, and line variation up to ±10% is tolerated by its rectifier and DC-link capacitors. Closed-loop regulation is executed with field-oriented vector control, which separates torque-producing and magnetizing currents for accurate motor response across the speed range. The inverter bridge is rated for 45 kW, making the controller suitable for mid-range pump, fan, and material-handling axes that require continuous duty and responsive torque. This control method also helps the drive maintain stable speed when the mechanical load changes during normal operation.
Heat generated by the IGBTs is expelled through a plug-through cooler for units up to 110 kW that passes through the cabinet wall, allowing external airflow to remove losses without loading the enclosure HVAC system. During rapid deceleration, a built-in brake chopper directs surplus DC-link energy to an external resistor, protecting the intermediate circuit from overvoltage. A mains-side integrated line filter suppresses conducted emissions, so additional EMC hardware is not required in typical installations. The controller is a generation 1 unit and is supplied without optional function boards, leaving communication and application features to the selected control arrangement.
Frequently Asked Questions about RD52.1-4B-045-D-NN-FW:
Q: What braking option is included in the RD52.1-4B-045-D-NN-FW drive controller?
A: The RD52.1-4B-045-D-NN-FW features a built-in brake chopper, allowing for efficient energy dissipation during braking cycles.
Q: What control type does the RD52.1-4B-045-D-NN-FW utilize?
A: This model uses field oriented vector control as its primary control method.
Q: Does the RD52.1-4B-045-D-NN-FW have a mains filter?
A: An integrated mains filter is included, reducing electrical interference and providing cleaner power.
Q: What is the rated power output of the RD52.1-4B-045-D-NN-FW drive controller?
A: The RD52.1-4B-045-D-NN-FW has a rated power of 45 kW for demanding industrial operations.
Q: What type of cooling does the RD52.1-4B-045-D-NN-FW use?
A: Cooling is managed by a plug-through cooler designed for models up to and including 110 kW.
