Product Description:

The RD52.1-8N-110-L-V1-FW is a drive controller produced by Bosch Rexroth Indramat within the RD 500 Drive Controllers series. It regulates three-phase induction motors in automated machinery by converting DC-bus power into variable-frequency, variable-voltage output. This lets speed and torque follow programmed motion profiles in material-handling lines, process equipment, and other industrial systems that require controlled motor response. Because the controller adjusts both voltage and frequency, it can support smooth acceleration, controlled deceleration, and stable running under changing load conditions.

This model is sized for loads up to 110 kW, making it suitable for high-power duties such as pumps, compressors, and extruders. The DC link operates at a continuous 700 V, and the power input is an Inverter DC supply commonly used in systems with a shared rectifier. Motor performance is managed with field-oriented vector control, which supports accurate current regulation during speed changes and improves torque response at varying operating points. Internal heat is removed by forced air cooling, with airflow moving across the heat sink to carry away switching losses. The unit is supplied without a built-in brake chopper, so applications with frequent deceleration require an external braking resistor or a regenerative module.

For control integrity during power outages, a dedicated input provides 24 V standby power so encoder data and bus communications can remain active while the power stage is off. The unit is Design Generation 1, which identifies the first design generation used for this platform. Keeping the control section energized during a bus interruption helps the controller retain status handling and communication functions until the main drive power returns. This separation between control power and output-stage power is useful in coordinated systems where supervisory communication must remain available during a temporary supply loss.