Product Description:

Bosch Rexroth Indramat manufactures the RD52.1-4B-005-L-NN-FW, a configurable member of the RD 500 Drive Controllers series for asynchronous and synchronous motor regulation in automated machinery. As a drive controller, it converts fixed-frequency input power into adjustable three-phase output that the motion system can use for speed and torque control. The unit is intended for cabinet installation inside production lines, packing equipment, or material-handling zones where tightly coordinated axes require precise current and flux regulation.

The controller accepts a three-phase input through its three-phase AC converter front end and operates within a line window of 380 to 480 V. This range can fluctuate by ±10 %, allowing the device to maintain full functionality on weak or slightly overvoltage grids. Internally, vector algorithms implement field-oriented vector control, enabling fast current loops and accurate torque production across the connected motor’s speed range. Output capacity is rated at 5.5 kW, providing sufficient power for medium-sized pumps, conveyors, or extruders without derating when ambient cooling air is available. The basic model ships without additional application-specific functions, making it suitable for installations that require core speed and torque control without extra option packages.

Thermal stability relies on forced air cooling, delivered by an internal fan that draws cabinet air through the heat sink. This airflow also keeps the semiconductors in Design Generation 1 operating below their junction limits. During rapid deceleration or load reversals, the built-in brake chopper diverts regenerated energy to an external resistor, preventing DC-bus overvoltage without feeding energy back to the mains. Line disturbances are further reduced by an integrated mains filter, which attenuates conducted emissions so surrounding equipment can meet EMC limits.