Product Description:

The RD52.1-7N-160-F-V1-FW drive controller is built by Bosch Rexroth Indramat as part of the RD 500 Drive Controllers series. It is an AC inverter intended to regulate asynchronous or synchronous motors in automated machinery by modulating DC bus energy into variable-frequency, torque-responsive output. Within a production cell, the unit links PLC setpoints to motor torque, enabling coordinated motion or process speed control. This operating role fits systems that require controlled acceleration, steady speed regulation, and repeatable response under changing load conditions.

The controller operates from a DC bus supply and uses field-oriented vector control to resolve stator currents into torque-producing components, giving fast dynamic response under load. Its DC input must lie between 530 to 670 V, a range that supports line rectifiers for 400 V class mains. From that bus, it supports motor applications up to 160 kW. The supply interface uses a common DC link rather than a direct mains connection. Thermal management combines forced-air cooling with integrated liquid circulation, so blower airflow and an internal liquid path remove concentrated heat losses. Because the hardware is supplied without a built-in brake chopper, external braking components are required when regenerated energy exceeds the capacity of the DC link.

Control electronics remain active during plant shutdowns through 24 V standby power, which is supplied from an external source to keep parameter memory and fieldbus communication available. The unit belongs to Design Generation 1, which matches the earliest RD 500 option cards and connector pinouts. This arrangement allows the control section to stay energized even when the main power section is off, reducing interruption to supervisory communication and stored settings.