RD51.2-5B-018-L-NN-FW Bosch Rexroth Indramat
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MPN: R911203318
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The Bosch Rexroth Indramat RD51.2-5B-018-L-NN-FW is a drive controller from the RD 500 Drive Controllers series. It features a rated power of 18.5 kW, uses U/f curve control, and has a built-in brake chopper. The controller is designed for forced air cooling and operates as a converter for three-phase AC with a voltage range of 500 V.
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Product Description:
The RD51.2-5B-018-L-NN-FW is a drive controller manufactured by Bosch Rexroth Indramat for the RD 500 Drive Controllers series. It is installed between the plant’s three-phase mains and an induction motor. In operation, it converts fixed-frequency line power into a regulated output so speed and torque can be adjusted for automated conveyors, mixers, and similar equipment as process demand changes. Because it sits between the supply and the motor, it regulates the output delivered to the machine without changing the incoming utility frequency.
This unit draws power through a 3 x AC converter supply and is designed for grids that remain within a continuous 500 V line-to-line range. Inside the controller, U/f curve control shapes the relationship between output voltage and frequency so that the motor develops predictable torque even at reduced speeds. This method keeps motor behavior steady across the usable speed range and suits applications where simple speed regulation is sufficient. Thermal management relies on forced air cooling; directed airflow removes switching losses from the heat sink and allows the electronics to run at full load without derating. At the motor terminals, the device can deliver up to 18.5 kW, which indicates the largest connected motor size suitable for continuous duty.
A built-in brake chopper diverts regenerated energy into an external resistor during rapid deceleration, preventing DC-link overvoltage. This arrangement supports applications that stop quickly or handle loads with significant rotational energy. The hardware belongs to design generation 2, which places the unit in the second control platform of this product family. The note firmware ordered separately means the control software must be added as a separate item before operation. No auxiliary application functions are equipped from the factory, so only the settings required for the target process need to be entered. The basic configuration leaves process-specific behavior to user-set parameters rather than factory-loaded application features.
Frequently Asked Questions about RD51.2-5B-018-L-NN-FW:
Q: Does the RD51.2-5B-018-L-NN-FW include a brake chopper?
A: This drive controller is equipped with a built-in brake chopper for managing excess regenerative energy.
Q: What control method does the RD51.2-5B-018-L-NN-FW use?
A: The RD51.2-5B-018-L-NN-FW utilizes U/f curve control for motor operation.
Q: How is the RD51.2-5B-018-L-NN-FW drive controller cooled?
A: Forced air cooling is implemented on this model to maintain optimal operating temperatures.
Q: What is the rated power output of the RD51.2-5B-018-L-NN-FW?
A: This drive controller is rated for a power output of 18.5 kW.
Q: What is the supply voltage range for the RD51.2-5B-018-L-NN-FW drive controller?
A: The RD51.2-5B-018-L-NN-FW supports a supply voltage range of 500 V from a three-phase AC converter.
