Product Description:

The RD52.1-7N-007-L-V1-FW is a drive controller produced by Bosch Rexroth Indramat within the RD 500 Drive Controllers series. As an inverter front end for synchronous and induction motors, it supplies regulated three-phase power to match the speed and torque demands programmed in an automation cell. By integrating with higher-level PLCs, the unit closes the electrical loop between the plant's DC bus and individual axes, enabling fast adjustments, coordinated motion profiles, and controlled braking in conveyor lines, presses, or material-handling stations.

At its input, the controller uses an Inverter DC supply that can vary from 530 to 670 V, and it converts that energy through switching devices governed by field-oriented vector control. This control method separates the stator current into flux-producing and torque-producing components so motor response remains stable during sudden load changes. The power stage is rated at 7.5 kW, which limits the continuous output available to the downstream motor. Thermal energy created during high-duty cycles is removed by forced air cooling, so cabinet airflow must be maintained to keep semiconductor temperatures within a safe operating range.

The unit is part of Design 1 in the RD52 platform and is supplied without a built-in brake chopper, so excess regenerative energy must be handled by an external resistor or a shared bus arrangement. For the control electronics, a protected low-voltage rail is maintained by 24 V stand-by power from an external supply, allowing communication and stored settings to remain available when the main link is isolated. Application-specific software is supplied separately so the drive can be matched to the intended control setup. This arrangement allows the same hardware platform to be adapted for different motor and system requirements.