Product Description:

The RD52.1-5N-075-D-V1-FW is a drive controller produced by Bosch Rexroth Indramat within the RD 500 Drive Controllers series. Designed for three-phase induction or synchronous motor regulation in production lines, it forms the interface between incoming plant power and the motor shaft. Using current and voltage feedback, the unit adjusts torque and speed in real time, enabling coordinated motion, energy optimization, and protective functions for conveyors, extruders, and pump modules in general industrial automation.

Its control core relies on field-oriented vector control, so stator currents are separated into flux-producing and torque-producing components for stable speed regulation at low frequencies. The power section is rated for a DC link fed by a nominal line of 500 V through a three-phase AC converter front end, which rectifies incoming line power and feeds the inverter bridge without an additional transformer. Nominal output is 75 kW, which supports medium-horsepower machinery while remaining within drive module frame size N. Thermal energy generated by the IGBTs is removed through a plug-through cooler for units up to 110 kW, which carries heat outside the cabinet wall and helps reduce enclosure temperature rise.

The unit is supplied without a built-in brake chopper, so an external resistor is required when regenerative peaks exceed the DC-link limit. Control electronics remain active during line-power isolation because the drive accepts external 24 V standby power, which keeps fieldbus communication available for diagnostics and controlled shutdown. Application software is listed as firmware ordered as a separate subposition, allowing the required software package to be selected for the drive. The hardware platform is identified as design generation 1, which matches the first release of the RD 500 family for mounting and interface compatibility.