Product Description:

The RD52.1-4B-045-L-V1-FW is a drive controller manufactured by Bosch Rexroth Indramat and placed in the RD 500 Drive Controllers series. It serves as the power-conversion stage between the plant mains and a three-phase induction motor, providing speed control for material-handling lines, pump stations, and general-purpose production cells. By adjusting output voltage and frequency, it helps the connected motor respond smoothly to changing load and process demand. That makes it suitable for applications that need steady motor response during starting, stopping, and controlled speed changes.

During continuous operation, the inverter can supply a motor phase current of 82 A, which is the continuous current limit for the power semiconductors and bus bars without derating. For short-term overloads lasting up to sixty seconds, the current ceiling rises to 107 A, which supports temporary demand during acceleration and other brief load peaks. The controller is sized for motor applications up to 45 kW, while the apparent electrical input is 54 kVA; this difference reflects conversion losses and the phase relationship between current and voltage in the drive system. The enclosure has a rating of IP20, so the unit is finger-safe but should be installed inside a cabinet to keep dust and liquids away from live sections.

Thermal management requires a cooling-air flow of 0.2 m³/s, so the cabinet needs a clear intake and exhaust path across the heat sink and power section. The controller is intended for industrial locations that meet class 3K3, which covers clean, ventilated indoor spaces with moderate humidity and normal temperature variation. It is intended for indoor cabinet installation rather than exposed areas with direct moisture or heavy contamination. Airflow around the unit should remain unobstructed so heated air does not circulate back through the enclosure.