RD51.1-5N-004-L-V1-FW Bosch Rexroth Indramat
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MPN: R911200372
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The Bosch Rexroth Indramat RD51.1-5N-004-L-V1-FW is a drive controller from the RD 500 Drive Controllers series. It supports U/f curve control and operates with a converter supply of 3 x AC at 500 V. This unit has forced air cooling and 24 V external standby power, and does not include a built-in brake chopper.
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Product Description:
The RD51.1-5N-004-L-V1-FW is a member of the RD 500 Drive Controllers series manufactured by Bosch Rexroth Indramat. Designed for cabinet installation, this AC inverter converts fixed utility frequency into a modulated output for induction motors over a broad speed range. By adjusting motor voltage and frequency, it supports energy-efficient operation and helps reduce mechanical stress on connected equipment in factory automation cells. Because the output frequency is variable, the drive can match motor speed to process demand instead of running continuously at line frequency. That behavior is useful where process speed changes are frequent, because acceleration and deceleration can be shaped around the load rather than imposed by direct-on-line motor starting.
The controller uses U/f curve control, a scalar method that keeps output voltage proportional to frequency for simple open-loop regulation of standard motors. Its input supply is centered on 500 V three-phase mains, and the unit is electrically classified as Converter 3 x AC, which combines rectification and inversion in one housing. The drive is supplied without a built-in brake chopper, so regenerative energy from overhauling loads must be handled by an external braking module or resistor. This control approach is suited to applications such as fans, pumps, and conveyors that need stable speed control without closed-loop motor feedback. By using scalar control, the inverter emphasizes straightforward motor operation rather than the tighter dynamic response associated with more complex vector or servo systems.
Thermal management uses forced air cooling, so installation clearances must allow airflow through the integrated fan path. The unit is design generation 1, which matches the earliest RD51 mechanical layout and connector arrangement. Control electronics remain active during mains interruptions when an external 24 V standby power supply is available, allowing communication and stored parameters to remain available. Keeping the low-voltage electronics active during a supply drop can help the drive stay ready for control recovery when the main power path returns. Classified as a Drive Controller, the unit provides the power stage for the drive system while motor feedback and higher-level application logic are handled by companion components.
Frequently Asked Questions about RD51.1-5N-004-L-V1-FW:
Q: Does the RD51.1-5N-004-L-V1-FW have a built-in brake chopper?
A: The RD51.1-5N-004-L-V1-FW drive controller does not include a built-in brake chopper.
Q: What control method is utilized by the RD51.1-5N-004-L-V1-FW?
A: U/f curve control is the control type used by this drive controller.
Q: How is the RD51.1-5N-004-L-V1-FW cooled?
A: This model is designed with forced air cooling to maintain its operating temperature.
Q: What is the voltage range for the supply input of the RD51.1-5N-004-L-V1-FW?
A: The RD51.1-5N-004-L-V1-FW has a voltage range of 500 V for its converter input.
Q: Is 24 V stand-by power available on the RD51.1-5N-004-L-V1-FW?
A: External 24 V stand-by power is supported as a function on this drive controller.
