RD51.1-4N-003-L-DF-FW Bosch Rexroth Indramat
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MPN: R911200672
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The Bosch Rexroth Indramat RD51.1-4N-003-L-DF-FW is a drive controller in the RD 500 Drive Controllers series with a rated power of 3.0 kW and operates on a voltage range of 380 to 480 V. It features forced air cooling, U/f curve control, and an integrated mains filter. The controller uses a converter 3 x AC supply and includes a NAMUR terminal strip with 24 V external standby power.
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Product Description:
The RD51.1-4N-003-L-DF-FW is a drive controller produced by Bosch Rexroth Indramat as part of the RD 500 Drive Controllers series. Intended for cabinet installation, it converts three-phase mains power and modulates voltage and frequency for induction motors. By closing the loop between the plant power bus and individual actuators, it provides speed and torque regulation for conveyors, pumps, and other material-handling equipment used in industrial automation. The controller is suited to variable-speed duties where consistent motor response is needed during starts, stops, and changing process loads.
Rated output is 3.0 kW, enabling the device to run medium-frame motors without oversizing. Supply terminals accept a line window of 380 to 480 V, and the power stage uses a three-phase AC converter topology. Line variations up to ±10% are tolerated without derating, so brief voltage swings do not interrupt operation. Motor excitation is based on U/f curve control, which links output frequency to voltage to help keep air-gap flux stable across load changes. This operating method supports predictable speed behavior at different loads and is commonly used with induction motors in general-purpose drive systems. The unit belongs to design generation 1 and provides current-filter feedback through the U6, V6, and W6 terminals for oscilloscope checks.
Thermal management is handled by forced air cooling, and dedicated airflow across the heat sink keeps semiconductor temperatures within safe limits during continuous duty. Line-side harmonics are reduced by an integrated mains filter, eliminating the need for an external EMC module and helping limit conducted noise on the supply connection. The power stack is specified without a built-in brake chopper, so excess regenerative energy must be processed by an external braking unit when decelerating high-inertia loads. Control wiring terminates on a NAMUR terminal strip with external 24 V standby power, allowing safety circuits to remain energized when the main supply is isolated. This arrangement keeps low-voltage control functions available while the main power section is off.
Frequently Asked Questions about RD51.1-4N-003-L-DF-FW:
Q: What is the rated power output of the RD51.1-4N-003-L-DF-FW drive controller?
A: The RD51.1-4N-003-L-DF-FW has a rated output power of 3.0 kW.
Q: What type of control method does the RD51.1-4N-003-L-DF-FW use?
A: This drive controller uses U/f curve control for regulating motor speed.
Q: What voltage range does the RD51.1-4N-003-L-DF-FW support?
A: It is designed for a supply voltage range between 380 and 480 V AC.
Q: Does the RD51.1-4N-003-L-DF-FW drive controller have an integrated mains filter?
A: The RD51.1-4N-003-L-DF-FW features integrated mains filtering for power quality.
Q: What type of cooling system is used in the RD51.1-4N-003-L-DF-FW drive controller?
A: Forced air cooling is utilized in this model to maintain optimal temperatures during operation.
