RD51.2-4B-007-L-A1-FW

MPN: R911201077

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The Bosch Rexroth Indramat RD51.2-4B-007-L-A1-FW is part of the RD 500 Drive Controllers series and features a rated power of 7 kW. This panel-mounted drive has a voltage class of 4B (400V, 380-480V AC) and supports vector, servo, or V/f control. It operates at output frequencies up to 650 Hz with internal fan cooling.

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Product Description:

The RD51.2-4B-007-L-A1-FW drive controller functions to convert electrical power and adjust motor parameters based on the application needs. It is a product of Bosch and the company is renowned for designing high-class units that meet high industrial needs.

This RD51.2-4B-007-L-A1-FW drive controller is part of the RD product group and operates using a line U/f curve type control system. It provides dependable performance for machinery that requires constant or variable speed operation under consistent load conditions. It is listed under design number 2 which works by showing a defined hardware variant that follows a specific electrical and mechanical setup suitable for mid-range domains. It comes with a rated power output of 7.5 kW and a partial load power of 3.8 kW as a balanced solution for various industrial automation systems with energy efficiency. Cooling is achieved through forced air cooling which ensures internal thermal stability during extended operational hours. This method increases the life span of internal components and sustains performance in moderate heat loads. The unit supports stand-by power external mode which includes a starting lock-out for safety interlocks and features filter current feedback capability.

The RD51.2-4B-007-L-A1-FW drive controller firmware is mainly assigned by the factory and works within a voltage range of 3-phase AC 380 to 480 V ±10% with internal support for a built-in brake chopper. The ordering must be handled through a subposition by separating it from the hardware to allow configuration flexibility. It delivers a frequency output range of 0 to 1400 Hz with a continuous output current of 10 A. The supply voltage is managed via SNT connection points C1/D1 which aids in handling a DC input of 530 to 670 V with a tolerance of ±10%.

Communication Interface
Optional PROFIBUS, RS485 possible depending on module
Control Type
Vector control (VC), Servo or V/f control
Cooling Method
Internal fan-cooled
Enclosure Type
L (Standard IP20 or equivalent)
Firmware Option
FW (Standard firmware installed)
Mounting Method
Panel mounting
Operating Temperature Range
-10°C to +40°C (derating required above 40°C)
Output Frequency
0...650 Hz
Overload Capability
150% of rated current for 60 seconds
Rated Power
7 kW
Voltage Class
4B (400V class, 380-480V AC)
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Frequently Asked Questions about RD51.2-4B-007-L-A1-FW:

Q: What is the rated power output of the Bosch Rexroth RD51.2-4B-007-L-A1-FW drive controller?

A: The Bosch Rexroth RD51.2-4B-007-L-A1-FW has a rated power output of 7.5 kW (3.8 kW under partial load), providing flexibility for various industrial applications.

Q: How does the RD51.2-4B-007-L-A1-FW handle cooling?

A: The RD51.2-4B-007-L-A1-FW utilizes forced air cooling to maintain optimal temperature levels, ensuring reliability and longevity even during prolonged use in industrial settings.

Q: What is the maximum output frequency for the RD51.2-4B-007-L-A1-FW?

A: The RD51.2-4B-007-L-A1-FW drive controller has a maximum output frequency of 1400 Hz, offering flexible speed control for diverse applications and motor types.

Q: What is the voltage range supported by the RD51.2-4B-007-L-A1-FW?

A: The RD51.2-4B-007-L-A1-FW operates within a voltage range of AC 380 to 480 V ±10%, making it adaptable to a variety of industrial electrical systems.

Q: How does the firmware for the RD51.2-4B-007-L-A1-FW work?

A: The firmware of the RD51.2-4B-007-L-A1-FW is factory-assigned and needs to be ordered separately, ensuring compatibility with various system configurations and performance requirements.


Internal Product Review

  • ‘‘The RD51.2-4B-007-L-A1-FW drive controller from Bosch series RD500 delivers excellent motor control with an output frequency of 0-1400 Hz and rated power of 7.5 kW. Its forced air cooling ensures reliable performance. The added feature of built-in brake chopper makes it suitable for industrial applications.’’

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