Product Description:

The RD52.1-4N-200-R-V1-FW is a drive controller manufactured by Bosch Rexroth Indramat and supplied within the RD 500 Drive Controllers series. As a converter-based unit for three-phase induction and synchronous motors, it modulates motor torque and speed so that automated machinery can follow programmed motion profiles and process parameters. It is suited for equipment that requires controlled acceleration, deceleration, and stable motor operation under changing loads. This makes it appropriate for conveyors, processing systems, and other installations that depend on adjustable speed and repeatable torque response.

This controller delivers a rated output of 200 kW to connected motors while accepting mains voltages from 380 to 480 V. The input window carries a tolerance of ±10 %, allowing operation on utility grids that fluctuate within that band. Power enters the unit through a three-phase AC converter front end and is conditioned by a built-in rectifier and DC link. Thermal dissipation relies on liquid cooling with an internal pump, so the housing can be mounted inside densely packed cabinets without overheating. This cooling method is used on frames rated at 132 kW and above, and it helps reduce heat buildup around power components during continuous heavy-duty operation.

Dynamic regulation is executed with field-oriented vector control, giving the drive precise current-phase alignment for high torque linearity. Because it is supplied without a built-in brake chopper, regenerative energy from rapid deceleration must be handled by an external resistor or a shared DC bus. An integrated mains filter limits conducted emissions, so additional line filters are normally unnecessary. Auxiliary logic and monitoring circuits remain energized through 24 V stand-by power sourced externally, which supports parameter retention and fieldbus supervision during main-power shutdowns. This arrangement keeps low-voltage control functions available even when the main input supply is turned off.