RD51.3-8C-055-L-V1-FW Bosch Rexroth Indramat
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MPN: R911203505
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The Bosch Rexroth Indramat RD51.3-8C-055-L-V1-FW is part of the RD 500 Drive Controllers series and features U/f curve control with a rated power of 55 kW. This SFT inverter operates on inverter DC supply with a voltage range of 700 V and uses forced air cooling.
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Product Description:
The industrial automation device RD51.3-8C-055-L-V1-FW is produced by Bosch Rexroth Indramat and belongs to the RD 500 Drive Controllers series. This controller conditions incoming DC bus power and modulates three-phase motor voltage so that conveyor, pump, and processing axes can run at application-specific speeds and torques. When paired with compatible induction motors, it provides enclosed electronic drive control while keeping the power section separate from machine areas exposed to vibration or contamination. Its role is to regulate motor operation in applications that require adjustable speed and stable torque response.
This unit uses U/f curve control, so the voltage applied to the motor remains proportional to the commanded frequency and helps maintain constant magnetic flux across the operating range. Heat generated by the power semiconductors is removed through forced-air cooling, with fans moving ambient air across internal heat sinks to control component temperature. The controller delivers a continuous mechanical output of 55 kW with a matched motor and is intended for DC bus systems up to 700 V. Because the input is an inverter DC input, the unit can be installed with rectifier modules or common DC-link arrangements. This layout supports variable-speed motor control without requiring a direct line-side AC input at the controller itself.
The hardware belongs to Design Generation 3, which uses updated diagnostics compared with earlier releases. A dedicated logic supply provides 24 V standby power, keeping the control electronics active during interruptions of the main power source so stored parameters and communication functions remain available. The controller is set for RD51 SFT operation, which uses speed-frequency tables optimized for soft-torque ramps. Its mechanical and I/O arrangement follows the SFT inverter configuration, providing predefined terminal assignments for braking choppers and external IGBT modules. The control software is ordered as a separate subposition so the base hardware can be matched to the required application package.
Frequently Asked Questions about RD51.3-8C-055-L-V1-FW:
Q: What control type does the RD51.3-8C-055-L-V1-FW drive controller use?
A: The RD51.3-8C-055-L-V1-FW operates using U/f curve control for motor speed regulation.
Q: What is the rated power of the RD51.3-8C-055-L-V1-FW?
A: This drive controller provides a rated power output of 55 kW.
Q: How is the RD51.3-8C-055-L-V1-FW cooled?
A: Forced air cooling is used for temperature management in the RD51.3-8C-055-L-V1-FW.
Q: What is the unit configuration and operational mode of the RD51.3-8C-055-L-V1-FW?
A: This model is configured as an SFT inverter and operates as an RD51 SFT.
Q: What voltage range does the RD51.3-8C-055-L-V1-FW support?
A: The operating voltage range for the RD51.3-8C-055-L-V1-FW is 700 V.
