RD51.1-4B-001-P-NN-FW Bosch Rexroth Indramat
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MPN: R911200715
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The Bosch Rexroth Indramat RD51.1-4B-001-P-NN-FW is a drive controller from the RD 500 Drive Controllers series. It operates with a voltage range of 380 to 480 V and uses U/f curve control. The unit includes an integrated mains filter, a built-in brake chopper, and supports a heat dissipation panel for cooling up to 18.5 kW.
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Product Description:
The RD51.1-4B-001-P-NN-FW is a drive controller manufactured by Bosch Rexroth Indramat for the RD 500 Drive Controllers series. It serves as the power-conversion and motor-management element in automation cells, modulating line energy to command three-phase induction motors and coordinate machine speed, torque, and start-stop sequences. This operating role makes it suitable for conveyor sections, process equipment, and other machinery that relies on stable variable-speed motor control. Because it combines power conversion and motor management in one unit, the controller fits cabinet installations where coordinated drive behavior is required.
The controller accepts a mains window of 380 to 480 V, and its input stage uses a 3 x AC converter to process the incoming supply for variable-frequency motor output. Motor excitation follows U/f curve control, so output voltage rises with frequency to help maintain usable magnetic flux in applications that do not need closed-loop vector feedback. This control method is commonly used where smooth speed adjustment is more important than high-dynamic position accuracy. Internal heat is transferred to a heat dissipation panel for outputs up to 18.5 kW, and that panel must be mounted to a metal cabinet wall to provide the intended cooling path. An integrated mains filter reduces conducted electrical noise on the supply side and supports cleaner operation in industrial installations. By limiting interference at the input, it also helps nearby control components operate more consistently.
During rapid deceleration, excess kinetic energy is handled by a built-in brake chopper, which avoids the need for a separate resistor interface in many medium-inertia applications. Output stability remains within a ±10% tolerance, helping the controller maintain predictable motor behavior during normal utility variation. That stability is useful for fans, pumps, and general-purpose process loads that depend on repeatable motor response. The unit is Design generation 1, so any compatible option cards should match that revision. The controller is supplied without operating firmware, and firmware is ordered as a separate subposition so the software package can be selected for the intended function. The base hardware is otherwise supplied without optional application functions.
Frequently Asked Questions about RD51.1-4B-001-P-NN-FW:
Q: Does the RD51.1-4B-001-P-NN-FW drive controller include a brake chopper?
A: This model features a built-in brake chopper for handling regenerative braking energy.
Q: What type of control method is provided by the RD51.1-4B-001-P-NN-FW drive controller?
A: The RD51.1-4B-001-P-NN-FW uses U/f curve control for variable speed operations.
Q: Does the RD51.1-4B-001-P-NN-FW drive controller have a mains filter?
A: It is equipped with an integrated mains filter to minimize electrical noise and ensure clean power operation.
Q: What power supply and voltage range does the RD51.1-4B-001-P-NN-FW accept?
A: This model supports a three-phase AC supply within a voltage range of 380 to 480 V.
Q: Which cooling method does the RD51.1-4B-001-P-NN-FW drive controller use?
A: The RD51.1-4B-001-P-NN-FW is cooled with a heat dissipation panel suitable for models rated at or below 18.5 kW.
