RD52.1-4B-075-L-NN-NN-NN-FW Bosch Rexroth Indramat
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MPN: R911289503
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The Bosch Rexroth Indramat RD52.1-4B-075-L-NN-NN-NN-FW is a drive controller from the RD 500 Drive Controllers series with a rated power of 75 kW. It features a built-in brake chopper, integrated mains filter, and uses field oriented vector control. The controller operates with forced air cooling and is designed for a voltage range of 380 to 480 V with a 3-phase AC supply.
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Product Description:
Bosch Rexroth Indramat builds the RD52.1-4B-075-L-NN-NN-NN-FW as a drive controller in the RD 500 Drive Controllers series. In automated plants, the unit converts three-phase mains power into a regulated output and commands induction or synchronous motors with speed and torque profiles suited to conveyors, pumps, and general machinery. By synchronizing motor current with the rotating field, the controller serves as the regulating link between the factory supply and the driven axis. This arrangement allows the motor to respond smoothly to load changes while maintaining stable operation across typical industrial duty cycles.
The controller operates on a line voltage from 380 to 480 V and is rated for 75 kW of continuous output, giving it capacity for medium-to-high power motion sections. Input power reaches the converter section through a three-phase AC converter topology, and allowable fluctuations are limited to ±10 % of nominal voltage, so the incoming supply must remain within that range for stable operation. Inside the control section, a field-oriented vector control algorithm calculates phase currents in real time, which helps the drive regulate torque accurately even at low motor speeds. The model is delivered without auxiliary option cards, so any added machine-level functions must be handled through external control hardware.
To absorb regenerated energy produced during fast deceleration, the controller includes a built-in brake chopper that diverts excess DC-bus voltage to an external resistor. Thermal management is handled by forced air cooling, and continuous airflow across the heat sink helps keep semiconductor temperatures within an acceptable operating range during full-load use. Electromagnetic compatibility at the cabinet entry point is supported by the integrated mains filter, which reduces conducted emissions without extra external wiring. This unit is design generation 1, so its keypad layout and interface connectors follow the first-release format used in the RD 500 platform.
Frequently Asked Questions about RD52.1-4B-075-L-NN-NN-NN-FW:
Q: Does the RD52.1-4B-075-L-NN-NN-NN-FW include a brake chopper?
A: This model features a built-in brake chopper for handling excess energy during braking cycles.
Q: What control type does the RD52.1-4B-075-L-NN-NN-NN-FW drive controller offer?
A: The RD52.1-4B-075-L-NN-NN-NN-FW uses field oriented vector control for precise motor regulation.
Q: What voltage range is supported by the RD52.1-4B-075-L-NN-NN-NN-FW?
A: This drive controller operates within a voltage range of 380 to 480 V AC.
Q: What cooling method does the RD52.1-4B-075-L-NN-NN-NN-FW use?
A: Forced air cooling is utilized in this model to manage internal temperatures.
Q: What is the rated power capacity for the RD52.1-4B-075-L-NN-NN-NN-FW drive controller?
A: The RD52.1-4B-075-L-NN-NN-NN-FW has a rated power output of 75 kW.
