Product Description:

The RD41.1-6B-050-L belongs to the RD 500 Drive Controllers series produced by Bosch Rexroth Indramat. As a controller, it regulates the energy delivered from a three-phase mains supply to induction or synchronous motors, allowing precise speed and torque control in automated machinery and process lines. By converting and managing the DC link within its internal power stage, the unit serves as a central element in cabinets where coordinated multi-axis motion or constant-torque pumping tasks are required.

This model delivers a rated apparent power of 50 kVA, and the DC link is rated for a continuous current of 100 A, so these values indicate the maximum motor load the drive can support during steady-state operation. It accepts a supply of three-phase AC 400 V ±15% at 50/60 Hz, so the same hardware can be used on European or North American grids without tap changes. An integrated line filter attenuates conducted emissions, while the enclosure is classified for IP20 ingress protection for panel-mounted installation inside a control cabinet. The contamination level is stated as 2, and environmental class 3K3 allows operation in lightly industrial atmospheres where moderate temperature and humidity variations occur. These conditions, combined with forced-air passages, keep the semiconductor junctions within thermal limits during full-load duty.

The housing measures 500 mm in height, 240 mm in width, and 360 mm in depth, yet its transport weight is only 36 kg, which helps simplify cabinet layout and handling. Heat is expelled through forced-air cooling, and the unit requires a clearance of 100 mm above and below so the fans can maintain airflow. A built-in brake chopper routes excess regenerated energy to a braking resistor no smaller than 5 Ω, preventing overvoltage during rapid deceleration cycles. This is a generation-1 controller for electric drives, and its forced-air topology matches the size class without external heat sinks.