RD51.2-4B-015-L-A1-FW Bosch Rexroth Indramat
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MPN: R911201114
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The Bosch Rexroth Indramat RD51.2-4B-015-L-A1-FW is a drive controller from the RD 500 Drive Controllers series. It features a rated power of 15.0 kW, supports a voltage range of 380 to 480 V with a ±10% tolerance, and provides U/f curve control. This drive controller is equipped with a built-in brake chopper, forced air cooling, and an integrated mains filter.
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Product Description:
The RD51.2-4B-015-L-A1-FW is a drive controller produced by Bosch Rexroth Indramat for the RD 500 Drive Controllers series. It serves as the central power electronics that converts fixed-frequency mains power into a variable output for three-phase induction motors used in industrial automation. This allows the connected motor to run at an application-appropriate speed instead of being limited to line frequency. In variable-speed systems, that behavior helps the motor follow changing process demands in equipment such as conveyors, fans, and pump assemblies. The unit is classified as a drive controller and belongs to design generation 2.
This unit delivers a continuous output of 15.0 kW, allowing it to regulate medium-sized pumps, fans, and conveyor drives. It accepts a supply within 380 to 480 V and continues operating when the line deviates by ±10 %, which supports use on industrial networks with moderate voltage fluctuation. The power section is built as a 3 x AC converter, meaning it rectifies three-phase input and inverts it to a variable-frequency waveform for the motor. Motor flux is managed through U/f curve control, a scalar method that pairs frequency with proportional voltage to keep magnetic conditions stable across the speed range. Heat is removed by forced-air cooling, so airflow through the heat sink supports full-current operation under sustained load.
An integrated mains filter reduces conducted emissions on the line side, and a built-in brake chopper provides a discharge path for regenerated energy during rapid deceleration. Additional functions include a mechanical start inhibit and the ability to power auxiliary electronics from an external stand-by source with starting lockout. This arrangement allows control circuits to remain available while preventing unintended motor startup when the main power section is not ready. It also helps the controller manage stopping events on overhauling loads without requiring a separate brake interface in many installations.
Frequently Asked Questions about RD51.2-4B-015-L-A1-FW:
Q: Does the RD51.2-4B-015-L-A1-FW feature a built-in brake chopper?
A: The RD51.2-4B-015-L-A1-FW drive controller includes a built-in brake chopper for enhanced braking capabilities.
Q: What type of control method does the RD51.2-4B-015-L-A1-FW use?
A: This model offers U/f curve control, allowing for basic control of AC motors using voltage and frequency relationships.
Q: How is the RD51.2-4B-015-L-A1-FW drive controller cooled?
A: Forced air cooling is utilized in this drive controller, maintaining optimal operating temperatures.
Q: What is the rated power output of the RD51.2-4B-015-L-A1-FW drive controller?
A: The RD51.2-4B-015-L-A1-FW delivers a rated power output of 15.0 kW.
Q: What voltage range does the RD51.2-4B-015-L-A1-FW support?
A: This drive controller operates within a voltage range of 380 to 480 V with a tolerance of ±10%.
