Product Description:

The RD52.1-4N-005-L-NN-FW is a drive controller built by Bosch Rexroth Indramat within the RD 500 Drive Controllers series. It conditions three-phase mains power so that variable voltage and frequency can be delivered to connected AC motors on automated lines. By governing torque and speed with closed-loop current regulation, the device supports precise positioning, energy savings, and reduced mechanical stress across conveyors, mixers, and material-handling cells. It also serves as the interface between higher-level PLCs and motor power stages, allowing coordinated multi-axis motion in modern production equipment.

Internally, the unit applies field-oriented vector control, resolving stator currents into torque and flux components for smooth low-speed operation and quick response. It accepts 380 to 480 V mains input, permitting installation without a transformer. The power section delivers a continuous output of 5.5 kW while helping protect the semiconductors against overcurrent. Thermal energy is removed through forced air cooling, which directs cabinet air across the heat sinks. For electromagnetic compatibility, an integrated mains filter attenuates conducted noise so the controller can share panels with instrumentation.

On the supply side, the controller is built as a three-phase AC converter, so its rectifier and intermediate circuit accept three-phase lines directly and feed the inverter section. Incoming line deviations of ±10 % are permissible, which helps where utility stability is limited. The unit is design generation 1, so its mechanical dimensions and terminal layouts match the first release of the RD52 family. Regenerative energy is not dissipated internally because the unit is supplied without a built-in brake chopper; applications that require braking resistors must use an external module.