Product Description:

The RD52.2-4B-005-L-A1-FW belongs to the RD 500 Drive Controllers series manufactured by Bosch Rexroth Indramat. As a drive controller, it interfaces between a plant’s three-phase supply and the motor, issuing regulated current and frequency commands to automate conveyors, pumps, or machine-tool axes. Within an automation cell, it forms the power stage of the closed-loop drive system, converting commands from a higher-level PLC into precise motor torque and speed. It can therefore respond to changing process demands without requiring the motor to operate at a fixed speed.

This model connects to a three-phase supply through a three-phase AC converter input and is specified for operation in the 380 to 480 V range. Line fluctuations are accepted within a margin of ±10 %, which helps the drive remain operational where incoming voltage varies within normal industrial limits. The power stage delivers a continuous mechanical output of 5.5 kW. A built-in brake chopper is included so regenerated energy during deceleration can be dissipated in an external resistor rather than being returned to the supply. This helps manage braking energy on loads with significant inertia. Protective functions also include external standby power capability and a starting lockout to help control startup behavior.

Motor regulation is executed with field-oriented vector control, allowing dynamic torque response across the speed range. Thermal management is handled by forced air cooling, and the fan channel directs airflow across the heat sinks to keep semiconductor temperatures within limits. The control method also supports smooth low-speed operation when the driven machine requires precise adjustment. Line-side interference is reduced by an integrated line filter, which removes the need for a separate cabinet component and supports EMC compliance. The unit is design generation 2.