Product Description:

The RD52.1-4N-001-D-NN-FW is a drive controller manufactured by Bosch Rexroth Indramat for the RD 500 Drive Controllers series. It functions as the central conversion stage between a three-phase power supply and the motor load, providing the regulated voltage and frequency needed for coordinated motion in conveyors, mixers, and other automated equipment. By supporting closed-loop motor control, the unit links higher-level PLC commands to the electromechanical action carried out by the connected motor. This allows the drive to respond to changing process demands while maintaining stable motor operation.

This model uses field-oriented vector control to regulate torque and flux independently, which supports precise speed control across the operating range. Thermal energy is removed through a plug-through cooler suited to cabinets up to 110 kW, allowing the heat sink fins to project outside the enclosure so the interior air stays cooler. Grid interference is reduced because an integrated mains filter suppresses conducted noise on the supply leads. The controller accepts a three-phase AC input and operates within a line voltage range of 380 to 480 V. Internal measurement circuits tolerate supply swings of ±10% tolerance, so routine fluctuations do not trigger a shutdown.

The unit is supplied without a built-in brake chopper, so external dissipation hardware is required when regenerative deceleration is expected. Parameter files match design generation 1, which keeps the controller aligned with the intended hardware revision. The required firmware is ordered as a separate subposition. Optional technology functions are not installed, so motion profiles, positioning modules, or communication layers are handled at the system level rather than inside the controller. This keeps the base unit focused on power conversion and motor control while leaving specialized functions to external system components.