Product Description:

The RD52.1-4B-090-W-V1-FW is a drive controller manufactured by Bosch Rexroth Indramat as part of the RD 500 Drive Controllers series. Positioned within the first design generation, this converter is installed in control cabinets to regulate three-phase AC motors used in conveying, forming, and packaging equipment. By processing feedback and modulating output waveforms, the device delivers the dynamic response needed for closed-loop motion tasks while separating high-energy motor circuits from sensitive control electronics. This arrangement lets the drive adjust motor speed and torque quickly as process demand changes.

It is rated for 90 kW continuous output, so the power section can handle large motors used on pumps, fans, and extruders without thermal overload in normal duty. The permissible input spans 380 to 480 V, giving the unit flexibility on common industrial power systems. Because it uses a three-phase AC converter, the module rectifies and inverts the mains supply to create variable-frequency, variable-voltage output for the motor. Motion control is executed with field-oriented vector control, which supports accurate torque production and stable low-speed operation. Thermal energy is removed through liquid cooling, which helps maintain semiconductor temperature in dense cabinet layouts.

The built-in brake chopper dissipates regenerative energy during rapid deceleration, preventing DC-bus overvoltage without a separate braking module. An integrated mains filter attenuates conducted emissions so the assembly can connect to plant power with less interference on adjacent equipment. Input variations of up to ±10% are tolerated, helping the controller remain operational during supply fluctuations. For standby and diagnostics, the unit accepts 24 V standby power, so status functions can remain available when the main supply is isolated. This is useful when parameters and fault information need to be checked without energizing the motor power stage.