Product Description:

The RZR01.2-RD51-0610-S-M-FW frequency converter controller is produced by Bosch Rexroth Indramat as part of the RZR Frequency Converters series. It functions as a motor inverter, taking DC power from a common supply and delivering modulated AC to asynchronous or synchronous machines in automated systems. Within a complete drive package, this unit occupies the control section and coordinates torque and speed commands from the higher-level PLC while managing inverter operation for the connected motor during routine speed changes and load variation. It is suited for centralized drive systems where the power section and control functions are arranged as coordinated modules inside the same cabinet.

The controller’s internal electronics are powered from 24 V ± 5%, so cabinet wiring must deliver a stable low-voltage source. Its output stage can deliver up to 610 A of motor current, letting the machine start and accelerate large induction motors without derating. Regulation is handled through U/f characteristic control, a scalar method that keeps the voltage-to-frequency ratio constant to preserve motor flux across the operating range and support stable speed behavior. Because the module uses single-converter circuitry, all three output phases are processed in one integrated power stack, which helps keep internal power routing straightforward and compact. A housing rated at IP20 allows mounting inside a closed electrical enclosure where only limited ingress protection is required. The unit is part of Design 2 in Line 01.

The permissible ambient temperature is 0 – 40 °C, which matches typical control-cabinet conditions. The unit draws no more than 12 A from the upstream DC link during normal modulation, which helps when sizing protective devices and busbars. With a mass of 6.5 kg, the controller remains manageable for panel installation. It is assigned to 3K3 (DIN IEC 721-3-3), indicating tolerance for moderate humidity and non-conductive dust in a ventilated cabinet.