Product Description:

The RD52.1-7N-160-R-V1-FW is a drive controller produced by Bosch Rexroth Indramat within the RD 500 Drive Controllers series. Intended for large-scale manufacturing equipment, this unit interfaces between an inverter DC link and an AC motor and issues precise current and frequency commands so the mechanical axis follows programmed profiles. By integrating with plant PLCs, the controller serves as the regulator of motion, speed, and torque in automated lines. This operating role makes it suitable for applications that require controlled acceleration, stable running speed, and repeatable load response.

At the core of its regulation algorithm is field-oriented vector control, which resolves stator currents into torque-producing components to keep motor flux constant under dynamic load changes. The power channel is rated for 160 kW, providing enough output for pumps, extruders, or test stands that require sustained mechanical power. An input window of 530 to 670 V at the DC link lets the unit share a common bus with rectifiers or regenerative sources without derating. Thermal energy from the IGBT stack is removed through liquid cooling with an internal pump, so heat is carried away independently of cabinet airflow. The device is supplied without a built-in brake chopper, so any required dynamic braking resistor must be installed externally.

The DC link is energized from an inverter DC supply, allowing modular stacking with upstream converters instead of direct mains input. Control electronics remain active during outages through 24 V standby power, supplied externally so parameter memory and fieldbus communication stay available. The hardware corresponds to design generation 1, which matches early RD 500 option cards. This arrangement allows the controller to remain responsive during brief supply interruptions while supporting communication with connected control systems.