Product Description:

The RD52.1-4N-030-L-V1-FW is a drive controller produced by Bosch Rexroth Indramat and belongs to the RD 500 Drive Controllers series. The unit regulates induction or synchronous motor speed and torque in automated machinery, making it suitable for conveyors, packaging equipment, and process lines where closed-loop electrical control is required. It forms the interface between the plant's three-phase mains and the motor, converting line power into a precisely modulated output according to commands from a higher-level PLC or motion processor.

This controller delivers a rated output of 30 kW, which is the maximum continuous output power the unit can supply to the motor without derating. The input section accepts line voltages from 380 to 480 V and maintains stable operation across supply variations within ±10 %. Power is received as a three-phase AC input, meaning alternating current is rectified and inverted internally before reaching the motor. Speed and torque are controlled through field-oriented vector control, which aligns stator currents with rotor flux for fast dynamic response and accurate low-speed performance. This control method supports stable operation during load changes and at low speeds.

Thermal management is provided by forced-air cooling, so airflow must remain unrestricted to avoid controller derating. Line-side electromagnetic interference is reduced by an integrated mains filter, eliminating the need for an external filter in most cabinets. Dynamic energy from deceleration is not dissipated internally because the device is supplied without a built-in brake chopper; an external chopper and resistor are required if frequent rapid braking is expected. Control electronics can remain active during mains outages through the external 24 V standby power input, permitting parameter retention and fieldbus communication.