Product Description:

The RD52.1-8N-160-R-V1-FW is manufactured by Bosch Rexroth Indramat and belongs to the RD 500 Drive Controllers series. In an automated line, this unit converts DC-link energy into controlled three-phase output for connected motors. This lets system PLCs command speed and torque, and it helps the drive maintain accurate operation as load conditions change.

At full load, the controller supplies 160 kW, enabling large-frame motors to deliver continuous mechanical power without derating. Regulation is executed through field-oriented vector control, a method that separates magnetic flux from torque-producing current so speed changes can be processed quickly. The power stage is connected to an Inverter DC intermediate circuit, so it expects rectified bus voltage rather than direct mains input. The power section is rated for a maximum bus level of 700 V, which provides margin during regeneration peaks. Heat from switching losses is removed by liquid cooling with an internal pump for units rated at 132 kW and above, and the integral pump circulates coolant through the heat exchanger to keep semiconductor temperatures stable during extended duty cycles.

For rapid deceleration duty, the unit ships without a built-in brake chopper, so high-inertia applications need an external resistor and chopper module for energy dissipation. The control electronics remain active through external 24 V standby power, which allows communication and stored settings to remain available while the main link is isolated. The unit is hardware revision 1, and this revision identifies the mechanical layout and connector pinout used by the controller. The firmware must be ordered as a separate subposition so the software package can match the selected encoder interface, communication option cards, and regional safety package.