Product Description:

The RZR01.1-RD51-0880-P-M-FW is a frequency converter controller produced by Bosch Rexroth Indramat within the RZR Frequency Converters series. As a motor inverter, it converts fixed-frequency DC bus energy from the drive system into a variable AC output for induction or synchronous motors on automated machinery. By modulating voltage and frequency, the unit supports speed, torque, and direction changes for conveyors, pumps, and other industrial motion axes. It is intended for drive systems that require adjustable motor output from a shared DC bus rather than direct line-fed operation.

Control electronics operate from 24 V ± 5% logic power, while the power section can supply up to 880 A of motor output current when full torque is required. The internal bus bars use a parallel circuitry layout so modules installed in the same cabinet can share load more evenly. Speed regulation uses U/f characteristic control, a scalar method that relates stator voltage to frequency so magnetic flux stays near nominal without closed-loop feedback. Because the control method is scalar, the unit is suitable for applications where straightforward speed control is preferred over motor feedback-based regulation. The housing has an IP20 enclosure rating, so the unit is intended for installation inside a switchgear cabinet rather than on an exposed machine surface. The converter is part of Design 1 in Line 01, matching the mechanical outline and terminal arrangement used for this product generation.

The allowable ambient operating range is 0 to 40 °C, so cabinet cooling must keep inlet air within that span during continuous operation. Under typical vector duty, the auxiliary supply draws 12 A, allowing the control and fan circuits to be fed from a relatively small auxiliary source. Total mass is 6.5 kg, which keeps the unit manageable for panel installation without lifting equipment. The unit is rated to 3K3 (DIN IEC 721-3-3), indicating tolerance for normal indoor humidity and limited dust, but not for corrosive atmospheres. This operating profile suits enclosed cabinet installations where airflow, dust control, and stable room conditions are maintained by the machine design.