Product Description:

Bosch Rexroth Indramat manufactures the RD52.1-4B-018-P-NN-FW, a drive controller in the RD 500 Drive Controllers series. The unit sits between the plant's three-phase mains and the motor, delivering regulated AC output for material handling and process lines. It is intended for centralized cabinet installation where several axes share a DC link and compact power stages help limit panel depth. Within automated cells, the controller supplies consistent torque, shapes acceleration ramps, and follows motion commands issued by the PLC.

The power section accepts line voltages from 380 to 480 V and tolerates supply variation of ±10%, so it can operate on standard industrial feeders without additional tap transformers. As a 3 x AC converter, it first rectifies the incoming mains, stores energy in its DC link, and then reconstructs a variable-frequency output waveform. Motor regulation is based on field-oriented vector control, which measures current components separately to maintain flux alignment and achieve fast torque response even at low speed. A built-in brake chopper is connected across the DC link to divert regenerative energy into an external resistor, helping prevent overvoltage during rapid deceleration or load overrun conditions.

The drive's continuous mechanical rating reaches 18.5 kW, and the thermal design supports this output through a heat dissipation panel that conducts losses to the cabinet wall for units up to that power level. Harmonic suppression on the mains side is aided by an integrated mains filter, allowing installation without a separate EMC component in many regions. The controller is part of design generation 1 and ships with no auxiliary application functions enabled. Additional operating sequences can be added through parameter settings when the application requires them.