Product Description:

The Bosch Rexroth Indramat RD52.1-4B-011-L-NN-G1-L2-FW belongs to the RD 500 Drive Controllers series. This modular unit controls three-phase induction and synchronous motors in large machinery lines, material-handling systems, and process equipment. By converting fixed mains power into adjustable frequency and voltage, it supports closed-loop speed and torque regulation so machines can respond smoothly to changing loads and maintain stable motion during production. This operating principle is useful in applications where conveyors, pumps, or coordinated axes must hold commanded speed as process demand changes.

The drive accepts a supply voltage range of 380 to 480 V through a 3 x AC converter front end that connects directly to plant power rails. Incoming variation is allowed within ±10% input tolerance, which helps the unit remain in operation during ordinary line fluctuations. Motor regulation uses field-oriented vector control, so the controller can manage torque and magnetic flux separately for responsive acceleration, steady low-speed behavior, and accurate speed holding under varying load. During rapid deceleration, excess energy is routed to a built-in brake chopper, which switches a braking resistor into the DC bus circuit to limit overvoltage.

Thermal management relies on forced-air cooling, and internal fans move cabinet air across the heat sink to keep power semiconductors within their operating range during continuous duty. Line-side emissions are reduced by an integrated mains filter, which helps simplify panel layout by reducing the need for separate RFI components. The hardware follows design generation 1, so it matches the accessory and parameter structure used by other first-generation units in the product line. The unit is supplied as a drive controller with no additional option functions installed, leaving the standard platform available for application-specific expansion through compatible external modules.