Product Description:

The RD52.1-4N-015-L-NN-FW is a drive controller produced by Bosch Rexroth Indramat for the RD 500 Drive Controllers series. Mounted inside a control cabinet, it receives commands from a PLC and modulates three-phase motor voltage and frequency to meet precise speed or torque references. In material-handling, pump, or positioning stations, this unit replaces mechanical throttling with electronic regulation, improving efficiency and cycle consistency.

At the power inlet, the device is a three-phase AC converter that draws energy within a line range of 380 to 480 V and tolerates deviations of ±10 %. Its inverter section is rated for 15.0 kW, allowing it to energize medium-sized drives while keeping heat and switching losses inside the design envelope. Control loops rely on field-oriented vector control, which calculates rotor flux orientation during each sampling period so that current is applied where it is most effective, leading to faster acceleration and reduced thermal stress. This electrical performance belongs to design generation 1, giving the unit a consistent footprint and terminal sequence across first-generation RD modules.

Thermal management is provided by forced air cooling, so cabinet layouts must leave clearance for the internal fan to move air across the heat sink. Dynamic braking hardware is absent, and the unit operates without a built-in brake chopper, so external resistor assemblies are required if rapid energy dissipation is expected. A line filter is already present and is integrated, which helps minimize conducted emissions toward the supply. The option slots are not equipped, allowing later addition of application-specific I/O or fieldbus boards. The required software package is ordered separately and must match the intended motion profile and safety functions.