Product Description:

The RD52.1-4B-315-F-MV-FW is a drive controller manufactured by Bosch Rexroth Indramat and belongs to the RD 500 Drive Controllers series. It sits between a three-phase supply and a motor, converting and regulating energy so conveyor lines, presses, and test stands can reach commanded speed and torque with closed-loop precision. In automated equipment, the unit interfaces with programmable logic controllers to coordinate motion, respond to load changes, and manage controlled deceleration during process stops. This role suits industrial systems that need stable motor control across changing operating conditions.

The drive accepts a line voltage from 380 to 480 V, which allows the same hardware to operate on common international low-voltage networks. Its input stage uses a 3 x AC converter, so the power section rectifies the mains and then produces a variable-frequency output for the motor. At the motor terminals it can supply 315 kW of continuous mechanical power, so installation must account for appropriately sized cabling and busbars. Line deviation up to ±10 % is tolerated without derating, which helps support facilities with moderate feeder variation. The drive uses field-oriented vector control for accurate torque at low speed and fast acceleration. A built-in brake chopper diverts regenerated energy into a resistor to keep the DC-bus voltage within safe limits during rapid stops.

Heat is removed by forced-air cooling with integrated liquid circulation, combining airflow across the power section with internal coolant passages to promote even semiconductor temperatures during sustained duty. Conducted emissions are reduced by an integrated mains filter, which helps limit interference with nearby equipment connected to the same supply. The unit is a Design Generation 1 model and uses the mounting dimensions and option slots associated with early RD 500 hardware. Its layout suits larger control cabinets that combine power conversion, braking, and motor regulation in one drive section.