RD51.1-4N-003-L-NN-FW Bosch Rexroth Indramat
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MPN: R911200140
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The Bosch Rexroth Indramat RD51.1-4N-003-L-NN-FW is a drive controller from the RD 500 Drive Controllers series with U/f curve control and a rated power of 3.0 kW. It features forced air cooling, an integrated mains filter, and operates within a voltage range of 380 to 480 V as a 3-phase AC converter. This design generation 1 controller does not include a built-in brake chopper.
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Product Description:
The RD51.1-4N-003-L-NN-FW is a converter-based drive controller produced by Bosch Rexroth Indramat for the RD 500 Drive Controllers series. It is intended to adjust the speed and torque of standard AC induction motors in automated material-handling lines, processing equipment, and pumping stations. The unit receives three-phase mains power and uses internal power electronics with microprocessor-based regulation to produce a controlled voltage-to-frequency output for variable-speed motor operation. By varying frequency and voltage together, it allows the connected motor to match process demand while reducing abrupt changes in speed on conveyors, fans, and similar equipment.
Its control algorithm is based on U/f curve control, meaning the ratio between output voltage and frequency remains constant to preserve magnetizing flux inside the motor across the operating range. This method supports stable running in applications that do not require more complex servo-style control behavior. Thermal management is handled by forced air cooling, and a cabinet fan moves air across the heat sinks to keep semiconductor temperatures within safe limits during continuous operation. An integrated mains filter reduces conducted electromagnetic interference on the supply side. The drive supports a voltage range of 380 to 480 V and accepts line fluctuations within ±10%, helping it operate on lightly regulated utility feeds.
For applications that demand short deceleration times, the device is supplied without a built-in brake chopper, so an external resistor-chopper module is required when regenerative energy must be dissipated quickly. This is especially important in systems with frequent stopping cycles or loads that return energy during braking. The inverter has a rated power of 3.0 kW, which suits standard motor loads in this output class. Incoming power must be three-phase AC to maintain balanced phase loading. The unit belongs to Design Generation 1.
Frequently Asked Questions about RD51.1-4N-003-L-NN-FW:
Q: What voltage range does the RD51.1-4N-003-L-NN-FW drive controller support?
A: The RD51.1-4N-003-L-NN-FW features a voltage range from 380 to 480 V, allowing compatibility with standard industrial power systems.
Q: Does the RD51.1-4N-003-L-NN-FW include a mains filter?
A: This model is equipped with an integrated mains filter for reduced electrical interference.
Q: What is the rated power output of the RD51.1-4N-003-L-NN-FW?
A: The drive controller is rated for a power output of 3.0 kW, ensuring it can handle moderate industrial loads.
Q: What type of cooling does the RD51.1-4N-003-L-NN-FW use?
A: Forced air cooling is used on this model, providing effective thermal management during operation.
Q: What type of control does the RD51.1-4N-003-L-NN-FW offer?
A: This controller operates with U/f curve control, making it suitable for variable frequency drive applications.
