RD51.1-4N-007-P-NN-FW Bosch Rexroth Indramat
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MPN: R911203122
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The Bosch Rexroth Indramat RD51.1-4N-007-P-NN-FW is a drive controller from the RD 500 Drive Controllers series with a rated power of 7.5 kW. It features U/f curve control and comes with an integrated mains filter for use with a 3-phase AC supply in the 380 to 480 V range.
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Product Description:
The RD51.1-4N-007-P-NN-FW drive controller is built by Bosch Rexroth Indramat as part of the RD 500 Drive Controllers series. It is used in industrial automation to convert fixed-frequency mains power into a variable output for standard AC motors. By adjusting motor speed to match process demand, the controller supports smoother operation in conveyors, pumps, fans, and similar equipment that do not need constant full-speed running. This approach helps the connected machine respond to changing load conditions without relying on a separate mechanical speed-control system. In routine duty, gradual speed changes can also reduce abrupt starts that would otherwise stress belts, couplings, and pumped systems.
Its rated output is 7.5 kW, so the unit can supply this continuous power level to a connected motor. The controller uses a 3 × AC converter supply and connects directly to a three-phase plant source. The permissible line voltage range is 380 to 480 V, and a tolerance of ±10 % allows for brief supply variation caused by switching events or normal grid fluctuation. That input range gives the unit flexibility in facilities where nominal supply levels vary between regions or where short utility disturbances occur during operation. Motor flux is regulated through U/f curve control, which keeps output voltage proportional to frequency through the operating range. This control method is commonly used for general-purpose AC motor applications that need reliable speed adjustment without closed-loop servo feedback.
Thermal management relies on a heat dissipation panel (≤ 18.5 kW), so installation must provide free airflow across the backplate to transfer losses into the cabinet wall. It is supplied without a built-in brake chopper, so an external resistor is required when the application needs dynamic braking during rapid deceleration. An integrated mains filter reduces conducted emissions on the incoming line. The unit is identified as design generation 1, and the optional function slots are not equipped. Because braking hardware is external, stopping behavior can be matched to applications with frequent deceleration or higher inertial loads.
Frequently Asked Questions about RD51.1-4N-007-P-NN-FW:
Q: What is the rated power of the RD51.1-4N-007-P-NN-FW drive controller?
A: The RD51.1-4N-007-P-NN-FW has a rated power output of 7.5 kW designed for demanding drive applications.
Q: Does the RD51.1-4N-007-P-NN-FW include a mains filter?
A: This model is equipped with an integrated mains filter to handle potential power line disturbances.
Q: How is the RD51.1-4N-007-P-NN-FW cooled during operation?
A: The drive controller uses a heat dissipation panel for cooling with support for applications up to 18.5 kW.
Q: What supply voltage range does the RD51.1-4N-007-P-NN-FW support?
A: The RD51.1-4N-007-P-NN-FW operates within a voltage range of 380 to 480 V AC with a tolerance of ±10%.
Q: What type of control method is utilized in the RD51.1-4N-007-P-NN-FW?
A: This drive controller employs U/f curve control, enabling reliable regulation of AC motors.
