RD51.1-4B-003-L-NN-P1-NN-FW Bosch Rexroth Indramat
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MPN: R911288050
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The Bosch Rexroth Indramat RD51.1-4B-003-L-NN-P1-NN-FW is a drive controller from the RD 500 Drive Controllers series. It features a rated power of 3.0 kW, a built-in brake chopper, and an integrated mains filter. The controller supports a voltage range from 380 to 480 V and uses forced air cooling.
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Product Description:
The RD51.1-4B-003-L-NN-P1-NN-FW is a drive controller produced by Bosch Rexroth Indramat and positioned within the RD 500 Drive Controllers series. As a standalone converter, it links a three-phase mains supply to an AC motor, adjusting voltage and frequency to regulate speed and torque in automated machinery, material-handling lines, and process equipment. By combining power electronics, scalar control logic, and protective monitoring in one enclosure, the unit simplifies panel layout while coordinating motor behavior with higher-level PLC commands in industrial automation.
The controller accepts a mains voltage range of 380 to 480 V, allowing it to connect to common industrial low-voltage networks. The input uses a 3 x AC converter topology, so three line conductors feed a rectifier and DC link before the inverter stage. Continuous output is rated at 3.0 kW, matching small to mid-frame induction motors used on pumps or conveyors. Supply fluctuations up to ±10 % are tolerated without derating, which helps maintain operation when plant voltage drifts. Thermal limits are managed by forced-air cooling; an internal fan directs airflow through heat-sink fins to maintain semiconductor temperatures during constant or cyclic duty.
Dynamic operation is supported by a built-in brake chopper that routes surplus DC-link energy to an external resistor, preventing overvoltage during fast deceleration. Speed regulation uses U/f curve control, a scalar method that keeps motor flux proportional to frequency and suits centrifugal loads where open-loop accuracy is sufficient. Line-side interference is reduced by an integrated mains filter, which attenuates harmonics and helps the installation meet electromagnetic compatibility rules. The unit is Design Generation 1 and uses the standard feature set for this controller type.
Frequently Asked Questions about RD51.1-4B-003-L-NN-P1-NN-FW:
Q: Does the RD51.1-4B-003-L-NN-P1-NN-FW have a brake chopper included?
A: The RD51.1-4B-003-L-NN-P1-NN-FW drive controller features a built-in brake chopper for dynamic braking applications.
Q: What control type is utilized by the RD51.1-4B-003-L-NN-P1-NN-FW?
A: This drive controller uses U/f curve control for managing motor speed and torque.
Q: What cooling method is implemented in the RD51.1-4B-003-L-NN-P1-NN-FW drive controller?
A: The RD51.1-4B-003-L-NN-P1-NN-FW is equipped with forced air cooling to maintain optimal operating temperatures.
Q: What is the rated power output of the RD51.1-4B-003-L-NN-P1-NN-FW?
A: The device offers a rated power capacity of 3.0 kW for its connected loads.
Q: What supply type and voltage range does the RD51.1-4B-003-L-NN-P1-NN-FW require?
A: It is designed for converter operation with a 3-phase AC supply and operates within a voltage range of 380 to 480 V, with a tolerance of ±10%.
