RD51.1-4N-004-P-NN-FW Bosch Rexroth Indramat
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MPN: R911200561
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The Bosch Rexroth Indramat RD51.1-4N-004-P-NN-FW is a drive controller in the RD 500 Drive Controllers series. It operates on a voltage range of 380 to 480 V with a supply type of converter 3-phase AC and includes an integrated mains filter. The unit utilizes a U/f curve control method and features heat dissipation panel cooling for models up to 18.5 kW.
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Product Description:
The RD51.1-4N-004-P-NN-FW is a drive controller produced by Bosch Rexroth Indramat as part of the RD 500 Drive Controllers series. It is engineered to regulate induction motors in factory machinery by adjusting the stator voltage and frequency according to load demand. In a typical automation cell, this unit sits between the mains supply and the motor, coordinating torque and speed commands from a higher-level PLC. This arrangement lets the controller adapt motor output to changing process conditions without direct mechanical adjustment. It helps maintain energy efficiency and stable motion profiles on conveyors, pumps, or material-handling equipment.
The controller operates with U/f curve control, a scalar method that links output frequency to voltage so the magnetizing flux of the connected motor stays relatively constant during acceleration and load shifts. It accepts three-phase power because its supply configuration uses a three-phase AC converter design, and the permissible input range spans 380 to 480 V. Voltage fluctuations within ±10 % of that range are tolerated without derating, which broadens compatibility with industrial feeders. Thermal energy produced by the power section is removed through a heat dissipation panel intended for units up to 18.5 kW, allowing installation in cabinets that do not use forced-air ducts. No optional technology or application functions are included, so the controller remains focused on basic speed control.
Line-side electromagnetic interference is attenuated by the integrated mains filter, so external RFI components are unnecessary. Dynamic braking energy cannot be absorbed internally because the unit is supplied without a built-in brake chopper; systems that need rapid stops must use an external chopper and resistor. The hardware follows design generation 1, which keeps the mechanical dimensions and terminal layout aligned with early RD 500 releases. The required operating software is not stored onboard; software is ordered as a separate subposition and loaded through the controller’s front port.
Frequently Asked Questions about RD51.1-4N-004-P-NN-FW:
Q: Does the RD51.1-4N-004-P-NN-FW drive controller have an integrated brake chopper?
A: This model does not include a built-in brake chopper.
Q: What control method is used by the RD51.1-4N-004-P-NN-FW drive controller?
A: The RD51.1-4N-004-P-NN-FW uses U/f curve control for motor operation.
Q: How is heat managed in the RD51.1-4N-004-P-NN-FW drive controller?
A: Heat dissipation for this model is managed through a panel design for systems up to 18.5 kW.
Q: Is there a mains filter integrated into the RD51.1-4N-004-P-NN-FW?
A: An integrated mains filter is included with this drive controller.
Q: What is the acceptable supply voltage range for the RD51.1-4N-004-P-NN-FW?
A: It supports a supply voltage range of 380 to 480 V AC three-phase.
