Product Description:

The RD51.1-4N-160-R-V1-FW is a drive controller from Bosch Rexroth Indramat in the RD 500 Drive Controllers series. It serves as the power conversion and motor regulation element in automated plant equipment, converting incoming electrical power into the variable voltage and frequency needed by induction motors and process drives. By combining control, protection, and supply interfaces in one housing, the unit helps simplify cabinet layouts in conveyor systems, pump installations, and material-handling stations.

At the input, the unit accepts a three-phase AC converter supply within a permissible voltage range of 380 to 480 V. It tolerates line voltage variation of up to ±10% before derating is required. Inside the controller, the integrated mains filter helps reduce conducted emissions, while the modulation stage delivers up to 160 kW of output power to the motor. Speed and torque are controlled through U/f curve control, a scalar method that maintains a consistent voltage-to-frequency ratio across the operating range. This control approach is well suited to fan and pump applications where broad speed adjustment is needed but dynamic vector regulation is not required.

Thermal management uses liquid cooling with an internal pump for 132 kW and above, allowing the heat exchanger to connect directly to a chilled-water loop while keeping enclosure airflow demands low. The power section is supplied without a built-in brake chopper, so regenerative energy must be directed to an external resistor module when controlled deceleration is required. The unit belongs to Design Generation 1, and firmware is ordered as a separate subposition so the selected motion functions can be matched to the application. An auxiliary 24 V standby input keeps the control electronics energized during line outages, which allows bus communication and diagnostic logging to remain available without powering the main inverter stage.