RD51.1-7N-004-L-NN-FW Bosch Rexroth Indramat
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MPN: R911200218
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The Bosch Rexroth Indramat RD51.1-7N-004-L-NN-FW is a drive controller in the RD 500 Drive Controllers series. It uses U/f curve control and operates with a DC inverter supply type and a voltage range of 530 to 670 V. This controller features forced air cooling and does not include a built-in brake chopper.
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Product Description:
The RD51.1-7N-004-L-NN-FW is a drive controller produced by Bosch Rexroth Indramat within the RD 500 Drive Controllers series. Designed for installation in automation cabinets, it converts the constant energy of a shared DC link into a variable three-phase output so induction motors can run at controlled speeds. This method gives the motor a controllable output frequency and voltage, which helps the machine start smoothly and follow process demand without relying on throttling devices or fixed-speed gearing. It is suited to cabinet-based systems that distribute power from a central supply section to multiple inverter modules.
The controller operates on a DC bus window of 530 to 670 V, allowing direct coupling to rectifier modules while keeping switching devices within safe limits. Because it uses an inverter DC supply, no additional mains rectifier is required, which streamlines cabinet wiring and reduces harmonics on the line side. Motor excitation follows U/f curve control, so magnetic flux remains proportional to frequency and the unit is well suited to steady-speed loads such as pumps and fans. Heat is removed by forced air cooling, with airflow directed over the IGBT heat sinks to manage internal temperature during continuous operation. The unit is supplied without a built-in brake chopper, so braking energy returns to the DC link and an external resistor is required when short stopping times are needed.
The product is part of design generation 1, so it uses the first electrical layout of the RD 500 platform. The required application software is selected separately, which lets the drive be matched to pump, hoist, or general-purpose motor control. At delivery, the option slots are not equipped, leaving room for later expansion with communication or input and output cards. An empty option area also keeps the base configuration simple when only core speed control is needed. As a compact drive controller, the RD51.1 unit fits shared-DC-link installations where several modules are arranged closely in the same cabinet.
Frequently Asked Questions about RD51.1-7N-004-L-NN-FW:
Q: What type of control method is featured on the RD51.1-7N-004-L-NN-FW drive controller?
A: This model uses U/f curve control for managing motor operations.
Q: What input voltage range does the RD51.1-7N-004-L-NN-FW support?
A: The RD51.1-7N-004-L-NN-FW operates within a voltage range of 530 to 670 V.
Q: How is the RD51.1-7N-004-L-NN-FW drive controller cooled?
A: This controller uses forced air cooling to maintain optimal operating temperatures.
Q: Does the RD51.1-7N-004-L-NN-FW include a built-in brake chopper?
A: The RD51.1-7N-004-L-NN-FW is manufactured without a built-in brake chopper.
Q: What is the design generation of the RD51.1-7N-004-L-NN-FW drive controller?
A: This model is part of design generation 1 in the RD 500 Drive Controllers series.
