Product Description:

The RZR01.1-RD52-0610-S-R-FW is a frequency converter controller built by Bosch Rexroth Indramat and placed within the RZR Frequency Converters series. The unit functions as a regenerative mains inverter, so energy that would normally be dissipated in mechanical braking resistors is returned to the plant power bus. Used between the drive modules and the supply, it lets multi-axis systems recover braking power while maintaining consistent DC bus voltage during motoring operation. This arrangement reduces heat generation in the cabinet during deceleration and supports stable operation when several axes share the same power infrastructure.

Incoming electronics are energized by a control supply of 24 V ± 5%, which keeps processor and logic functions active even when the main line is isolated. The power section can conduct up to 610 A of regenerative current, providing a broad margin for high-inertia deceleration events. A housing rated at IP20 provides finger protection, while the surrounding cabinet supplies the barrier against dust and moisture. Thermal performance is suitable for an ambient range of 0 – 40 °C, so full current remains available in standard switchgear rooms. The converter weighs 6.5 kg, which reduces structural load on the cabinet and makes mounting less demanding in compact installations.

Precise energy flow is achieved through field-oriented vector control, which helps the inverter regulate regenerative current with a stable and responsive control method. Internally, the power semiconductors are arranged as a single circuitry stage, keeping the internal power path direct and easier to track thermally. The unit is suitable for the 3K3 (DIN IEC 721-3-3) class, matching closed cabinets that use controlled humidity and filtered airflow. During idle periods, the auxiliary section draws just 12 A, so standby demand stays limited while the control section remains ready for operation. These operating characteristics suit regenerative drive systems that need controlled energy return without relying on external braking resistors.