RD51.1-4N-037-D-NN-FW Bosch Rexroth Indramat
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MPN: R911201436
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The Bosch Rexroth Indramat RD51.1-4N-037-D-NN-FW is a drive controller from the RD 500 Drive Controllers series with a rated power of 37 kW. It supports a voltage range of 380 to 480 V with a tolerance of ±10 percent and uses a plug-through cooler for cooling. The controller utilizes U/f curve control and comes with an integrated mains filter.
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Product Description:
The RD51.1-4N-037-D-NN-FW is a drive controller produced by Bosch Rexroth Indramat within the RD 500 Drive Controllers series. This unit regulates the speed and torque of three-phase induction motors by converting fixed-frequency mains power into a commanded output profile that matches process demands. In automated machinery lines, it acts as the intermediary between the plant’s AC supply and the motor, providing adjustable frequency and protecting connected equipment from electrical disturbances. This type of variable-speed control helps soften motor starts, adjust running speed during operation, and support processes that need steady acceleration or deceleration.
The controller accepts a three-phase supply through a 3 × AC converter front end and operates across a line window of 380 to 480 V. Input swings are managed within a ±10% tolerance band, so the device can remain stable on grids with modest voltage variation. Its power section is rated for 37 kW, enabling medium-sized pumps, fans, or conveyor drives to run under closed-loop supervision. Speed modulation is handled by U/f curve control, a scalar strategy that keeps stator flux constant while the output frequency changes. To limit conducted emissions, an integrated mains filter is fitted ahead of the converter. No application-specific functions are preloaded, so the controller can be adapted through the control interface to match plant requirements.
Thermal management is achieved with a plug-through cooler for outputs up to 110 kW, allowing most of the heat to dissipate outside the cabinet and reducing enclosure temperature rise. Because much of the thermal load is moved beyond the panel interior, nearby control components are exposed to less accumulated cabinet heat during continuous operation. The unit uses design generation 1, which keeps it aligned with other first-generation RD 500 units. For braking events, the power stage is supplied without a built-in brake chopper, so external dynamic braking hardware must be provided when rapid deceleration is required.
Frequently Asked Questions about RD51.1-4N-037-D-NN-FW:
Q: What is the rated power output of the RD51.1-4N-037-D-NN-FW drive controller?
A: The RD51.1-4N-037-D-NN-FW controller is rated for 37 kW output.
Q: What type of cooling method does the RD51.1-4N-037-D-NN-FW use?
A: The RD51.1-4N-037-D-NN-FW features a plug-through cooler for cooling, suitable for units up to 110 kW.
Q: Does the RD51.1-4N-037-D-NN-FW include a mains filter?
A: This drive controller is equipped with an integrated mains filter, helping to reduce electrical noise.
Q: What supply voltage range is supported by the RD51.1-4N-037-D-NN-FW?
A: The RD51.1-4N-037-D-NN-FW operates on a 3-phase AC supply with a voltage range from 380 to 480 V.
Q: Does the RD51.1-4N-037-D-NN-FW come with a built-in brake chopper?
A: This model does not have a built-in brake chopper.
