RD51.1-7N-075-L-V1-FW Bosch Rexroth Indramat
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MPN: R911200802
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The Bosch Rexroth Indramat RD51.1-7N-075-L-V1-FW is a drive controller from the RD 500 Drive Controllers series. It features U/f curve control, supports 75 kW rated power, and uses forced air cooling. The inverter operates over a voltage range of 530 to 670 V and provides 24 V external stand-by power.
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Product Description:
The RD51.1-7N-075-L-V1-FW is a drive controller manufactured by Bosch Rexroth Indramat as part of the RD 500 Drive Controllers series. Designed for cabinet mounting, the unit serves as the power section of variable-speed AC drives used in material-handling lines, pumps, and general factory automation. It modulates the motor supply by adjusting the DC link voltage provided by a common rectifier, allowing precise motor-speed control according to process demands. Its control electronics interface with higher-level PLCs through standard fieldbus options, enabling coordinated multi-axis operation.
The controller links to a common DC bus from 530 to 670 V; this is the permissible intermediate-circuit voltage when several inverters share one supply. At a continuous output of 75 kW, the unit can drive medium-sized induction motors without derating. Speed regulation uses U/f curve control, so output voltage tracks frequency to maintain motor flux in applications that do not require vector feedback. Thermal limits are managed by forced air cooling, which directs airflow over the heat sink. Because the unit is supplied without a built-in brake chopper, an external resistor is needed for fast regenerative stops.
As an Inverter DC device, the RD51.1 power stage accepts a stabilized link from a front-end converter instead of rectifying mains on its own, which can simplify harmonic mitigation in multi-drive installations. Auxiliary circuitry includes 24 V stand-by power from an external source to keep the control logic active during main power isolation for parameter retention and fieldbus communication. The hardware belongs to design generation 1, which supports compatibility with early RD 500 option cards and I/O adapters. Application firmware is ordered separately so the unit can be matched with software intended for motion or pump control.
Frequently Asked Questions about RD51.1-7N-075-L-V1-FW:
Q: What is the rated power output for the RD51.1-7N-075-L-V1-FW drive controller?
A: The RD51.1-7N-075-L-V1-FW controller offers a rated power output of 75 kW.
Q: What is the operational voltage range for the RD51.1-7N-075-L-V1-FW?
A: This model operates within a voltage range of 530 to 670 V.
Q: How is the RD51.1-7N-075-L-V1-FW cooled during operation?
A: The RD51.1-7N-075-L-V1-FW uses forced air cooling to maintain appropriate operating temperatures.
Q: What control method does the RD51.1-7N-075-L-V1-FW utilize?
A: This controller is equipped with U/f curve control for motor management.
Q: Does the RD51.1-7N-075-L-V1-FW include a built-in brake chopper?
A: A built-in brake chopper is not included with this drive controller.
