RD51.1-4N-003-L-CF-FW Bosch Rexroth Indramat
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MPN: R911200644
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The Bosch Rexroth Indramat RD51.1-4N-003-L-CF-FW is a drive controller from the RD 500 Drive Controllers series. It features 3.0 kW rated power, supports a voltage range of 380 to 480 V, and uses a converter 3 x AC supply. This model has forced air cooling, U/f curve control, and comes with an integrated mains filter.
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Product Description:
The RD51.1-4N-003-L-CF-FW is a drive controller manufactured by Bosch Rexroth Indramat for the RD 500 Drive Controllers series. It regulates induction motors in automated machinery by adjusting the output frequency and voltage supplied to the motor windings. This supports steady speed control in equipment such as conveying, pumping, and general process systems where smooth motor response is needed. By controlling motor input instead of relying only on mechanical throttling, the drive can better match motor operation to changing process demand. The unit belongs to design generation 1, so it follows the first RD51 platform layout and control arrangement.
The controller modulates motor speed by applying a U/f curve control algorithm; this method preserves the motor’s magnetic flux while varying frequency, making it suitable for pumps, fans, and conveyors that do not need vector-oriented torque regulation. Its output is rated at 3.0 kW, which sets the continuous drive capacity for compatible motor loads. The power section accepts line voltages from 380 to 480 V and continues to operate when the mains fluctuate within a ±10 % band, allowing it to handle normal industrial supply variation. Input power enters as Converter 3 x AC, then passes through rectification and a DC link before the inverter produces the variable AC waveform for the motor. This sequence lets the drive deliver adjustable motor speed from a fixed industrial power source.
Cooling is handled by forced air cooling, so installation must leave a clear airflow path through the heat sink channels and avoid blocking the intake or exhaust openings. Electrical noise on the input side is reduced by an integrated mains filter, which helps limit conducted interference toward upstream equipment. The unit is supplied without a built-in brake chopper, so applications that require fast deceleration need an external braking arrangement. This setup is common when braking duty is handled by separate hardware in the power system. Functional extensions C1 + F1 are installed, adding application-specific control functions and communication capability beyond the basic model.
Frequently Asked Questions about RD51.1-4N-003-L-CF-FW:
Q: What is the rated power output of the RD51.1-4N-003-L-CF-FW drive controller?
A: The RD51.1-4N-003-L-CF-FW offers a rated power output of 3.0 kW, making it suitable for moderate power applications.
Q: Does the RD51.1-4N-003-L-CF-FW include a mains filter?
A: This model features an integrated mains filter to help reduce electrical noise in applications.
Q: What type of cooling system is used in the RD51.1-4N-003-L-CF-FW?
A: The RD51.1-4N-003-L-CF-FW uses forced air cooling to maintain optimal operating temperatures.
Q: What supply voltage range does the RD51.1-4N-003-L-CF-FW support?
A: This drive controller operates within a voltage range of 380 to 480 V and accepts a supply with a tolerance of ±10%.
Q: What type of control is implemented in the RD51.1-4N-003-L-CF-FW drive controller?
A: The RD51.1-4N-003-L-CF-FW uses U/f curve control for its drive control method.
