Product Description:

The RD52.1-4B-005-L-V1-P1-L2-FW is a drive controller produced by Bosch Rexroth Indramat within the RD 500 Drive Controllers series. It converts fixed three-phase mains power into a variable frequency and voltage output for induction or synchronous motors used in conveyor, pump, and machining cells, providing coordinated speed and torque control to match process demands. This capability supports stable operation in tightly controlled manufacturing environments. The drive is intended for applications where motor response must remain consistent during changing process conditions.

As a three-phase AC converter, the controller accepts line power in the 380 to 480 V range, and the electronics tolerate supply fluctuations of ±10 %, so operation can continue without additional line conditioning in many installations. The internal power section delivers 5.5 kW of continuous output, which suits motors that must run without derating under normal load. Motion is regulated by field-oriented vector control, which separates the stator current into torque-producing and flux-producing components and allows full torque at very low shaft speeds. This control method improves low-speed response and helps maintain steady torque during startup or load changes.

A built-in brake chopper dissipates regenerated energy into a resistor, protecting the DC link during abrupt deceleration or overhauling loads. Heat from the switching elements is removed by forced air cooling, so the unit needs a clear airflow path through the heat sink. An integrated mains filter reduces conducted emissions at the cabinet terminals. For control circuits, the unit relies on externally supplied 24 V standby power, which allows parameter access and fieldbus monitoring while the main contactor is open. This arrangement keeps auxiliary electronics available even when the power stage is not energized, which supports communication and status checks.