Product Description:

The RD52.1-4B-160-F-V1-FW belongs to the RD 500 Drive Controllers series from Bosch Rexroth Indramat. As a drive controller, it interfaces between a three-phase supply and an induction or synchronous motor to regulate torque and speed in automated machinery, material-handling lines, and similar industrial motion systems. It is commonly used where a central drive must maintain stable motor behavior under changing process loads and frequent speed adjustments. This unit is part of the first design generation of the product family and is intended for cabinet-mounted drive applications that require coordinated motor control.

The controller accepts line voltages from 380 to 480 V and is rated for a continuous output of 160 kW, providing headroom for high-power conveyor sections or pump stations. A built-in brake chopper dissipates regenerated energy during rapid deceleration, helping prevent DC-bus overvoltage. Motor torque is adjusted through field-oriented vector control, which allows precise current modulation instead of simple V/Hz operation. This control method supports smoother acceleration and tighter speed regulation in applications that cannot tolerate wide slip variation. Harmonic attenuation on the mains side is handled by an integrated mains filter, which reduces the need for additional external line filtering in many cabinets.

The power section tolerates input variations of ±10 %, and thermal management uses forced-air cooling with integrated liquid circulation to remove heat through internal ducts and a connected coolant loop. Line connection is provided by a three-phase AC converter stage, so the unit rectifies and inverts the incoming supply without an intermediate transformer. For the control electronics, an auxiliary circuit uses 24 V stand-by power from an external source, allowing communication and stored settings to remain available when main power is isolated. Separating the auxiliary supply from the main input lets communication links remain active during power isolation for controlled restart behavior.