RD51.1-5N-075-L-DL-FW Bosch Rexroth Indramat
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MPN: R911200665
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The Bosch Rexroth Indramat RD51.1-5N-075-L-DL-FW is a drive controller from the RD 500 Drive Controllers series. It offers a rated power of 75 kW and supports a voltage range of 500 V with U/f curve control. This unit features forced air cooling and operates without a built-in brake chopper.
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Product Description:
The RD51.1-5N-075-L-DL-FW is a drive controller produced by Bosch Rexroth Indramat for the RD 500 Drive Controllers series. It is intended for speed-variable operation of standard induction motors in factory automation, where a compact converter and field-installable options help reduce panel space. By processing line power and modulating output frequency, the unit serves as the central element in conveyor sections, mixers, and similar equipment that do not require regenerative braking. This operating principle lets the drive match motor speed to process demand while reducing mechanical stress during routine starts and stops.
This controller draws power through a 3 x AC converter supply and is specified for a nominal line voltage of 500 V. Within that range, it can deliver a continuous mechanical output of 75 kW, allowing it to run medium-size pumps or fans directly from the cabinet. Motor flux is regulated with U/f curve control, a voltage-to-frequency method suited to applications that do not need closed-loop vector feedback. Thermal management is provided by forced air cooling, and the integral fan moves cabinet air across the heat sink so derating is avoided up to the stated ambient limit. The unit is part of Design Generation 1, and it uses the mounting pattern and field wiring conventions common to the RD family.
The converter is supplied without a built-in brake chopper, so external dynamic braking hardware must be added if rapid deceleration or overhauling loads are present. Control wiring is simplified by a NAMUR terminal strip with external 24 V standby power, allowing plant safety circuits to remain energized during line-power lockouts. For load-matching diagnostics, the unit transmits cable damping feedback (C3, D3) to the higher-level controller, enabling compensation for long motor leads. This diagnostic channel helps the control system account for signal effects that can appear when the motor is installed far from the cabinet.
Frequently Asked Questions about RD51.1-5N-075-L-DL-FW:
Q: Does the RD51.1-5N-075-L-DL-FW have a built-in brake chopper?
A: The RD51.1-5N-075-L-DL-FW operates without a built-in brake chopper, so an external brake chopper must be used if braking energy needs to be dissipated.
Q: What type of control does the RD51.1-5N-075-L-DL-FW use?
A: This drive controller utilizes U/f curve control for regulating motor operation.
Q: How is the RD51.1-5N-075-L-DL-FW drive controller cooled?
A: The RD51.1-5N-075-L-DL-FW model features forced air cooling to maintain optimal operating temperature.
Q: What supply voltage is required for the RD51.1-5N-075-L-DL-FW?
A: This drive controller is designed for operation with a 500 V voltage range supplied via 3-phase AC power.
Q: What is the rated power output of the RD51.1-5N-075-L-DL-FW drive controller?
A: The RD51.1-5N-075-L-DL-FW is rated for a power output of 75 kW.
