Product Description:

The RZR01.1-RD51-0610-S-M-FW is a frequency converter controller manufactured by Bosch Rexroth Indramat within the RZR Frequency Converters series. It acts as the power section of a motor inverter, converting DC bus energy into variable-frequency, variable-voltage AC for induction or synchronous motors used in material handling and process lines. By linking drive control electronics with plant-level automation, the unit supports regulated motor speed and smooth starting without mechanical switching. Its role is to supply the controlled output that a connected motor needs for repeatable operation across changing load conditions. This makes it suitable for applications that need controlled acceleration and deceleration instead of direct-on-line motor starting.

It accepts a nominal input control supply of 24 V ± 5%, which powers the internal logic and gating stages. The power semiconductors are rated for a peak output of 610 A, enabling the device to start high-inertia loads while remaining within the thermal limits for Design 1 of Line 01. Torque is set through U/f characteristic control, a scalar method that maintains motor flux across the usable speed range. The drive section uses a Single circuitry layout, so one converter channel serves one motor rather than a shared DC-link arrangement. Protection against finger ingress is provided by an enclosure rated IP20, which is appropriate for installation inside a ventilated electrical cabinet.

During standby, the controller draws a control current of 12 A, which helps determine the required capacity of the auxiliary power supply. Reliable operation is permitted from 0 – 40 °C; within this range, the internal components meet the climatic demands of the 3K3 (DIN IEC 721-3-3) class, meaning the unit tolerates moderate humidity and minimal conductive dust. The controller has a mass of 6.5 kg, which suits mounting on back panels with standard M-profile rails.