Product Description:

The RD52.1-4B-200-R-V1-FW belongs to the RD 500 Drive Controllers series manufactured by Bosch Rexroth Indramat. It is a three-phase AC converter intended to regulate induction or synchronous motors in automated machinery, using vector algorithms to keep torque and speed consistent under variable load. Within an installation, it serves as the central power stage between the mains supply and the motor, executing closed-loop control commands from higher-level PLCs.

This unit is rated for 200 kW of continuous mechanical output and accepts a supply window of 380 to 480 V from industrial power networks. Allowable input fluctuations are limited to ±10 %, so cabinet components do not require additional voltage conditioning. The unit is a Converter 3 × AC and applies field-oriented vector control to decouple flux and torque, giving fast dynamic response even at low motor speed. Design generation 1 electronics are housed in a frame intended for application-specific control functions. The controller’s gate arrays supervise current feedback, while the control electronics manage parameter storage, fault logging, and serial diagnostics.

A built-in brake chopper passes regenerated energy to an external resistor when the motor decelerates. Drive losses are removed through liquid cooling with internal pump, which helps keep semiconductor temperatures within their operating limit in high-power frames. For electromagnetic compatibility, the unit includes an integrated mains filter that attenuates conducted interference on the supply lines. Control electronics remain active during plant power outages because the unit supports 24 V stand-by power from an external source. Auxiliary services such as pump actuation and chopper gating are coordinated through this low-voltage rail so the drive can enter a safe state before the main converters de-energize.