RD51.2-4B-007-L-NN-FW Bosch Rexroth Indramat
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MPN: R911201253
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The Bosch Rexroth Indramat RD51.2-4B-007-L-NN-FW is a drive controller from the RD 500 Drive Controllers series with a rated power of 7.5 kW. It features U/f curve control, a built-in brake chopper, and uses forced air cooling. The controller operates on a 3-phase AC supply with a voltage range of 380 to 480 V and includes an integrated mains filter.
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Product Description:
The RD51.2-4B-007-L-NN-FW is a drive controller built by Bosch Rexroth Indramat for the RD 500 Drive Controllers series. It forms the central interface between the plant PLC and the motor, executing start, stop, and speed commands while monitoring operating conditions through current-based feedback. In automated production lines, this unit regulates power between the incoming line supply and an induction motor, enabling speed adjustment without mechanical gear changes. Because the drive varies electrical output frequency and voltage, the motor can follow changing process demands more smoothly than a fixed-speed arrangement. This makes the controller useful in systems that need controlled acceleration and reduced mechanical stress during startup.
This controller draws three-phase power through its supply section classified as Converter 3 x AC and accepts line voltages in the range of 380 to 480 V. Within that window, the input can deviate by ±10 % without causing a fault, allowing installation on industrial grids with moderate fluctuation. The power stage delivers a continuous mechanical output of 7.5 kW, which suits medium-duty motor loads such as pumps, fans, and conveyors. A built-in brake chopper dissipates regenerated energy during deceleration instead of allowing the DC-link voltage to rise. The unit does not include additional technology functions, so any application-specific control features must be handled by the host PLC.
The controller is part of design generation 2 and uses forced air cooling to move heat away from the IGBTs and keep cabinet temperatures stable. Speed regulation is carried out with U/f curve control, which maintains a fixed voltage-to-frequency ratio for reliable induction motor magnetization across normal operating ranges. An integrated line filter is already fitted, reducing conducted interference and often removing the need for a separate external filter in the panel. It also helps keep conducted noise from feeding back into nearby equipment on the same supply.
Frequently Asked Questions about RD51.2-4B-007-L-NN-FW:
Q: Does the RD51.2-4B-007-L-NN-FW drive controller include a brake chopper?
A: This drive controller comes with a built-in brake chopper for improved dynamic braking capability.
Q: What cooling method is used for the RD51.2-4B-007-L-NN-FW drive controller?
A: The RD51.2-4B-007-L-NN-FW features forced air cooling to maintain its operating temperature.
Q: What input voltage range does the RD51.2-4B-007-L-NN-FW accept?
A: This model supports a voltage range from 380 to 480 V for flexible installation in industrial environments.
Q: What is the rated power output of the RD51.2-4B-007-L-NN-FW drive controller?
A: The RD51.2-4B-007-L-NN-FW is rated for 7.5 kW, supporting medium-power drive applications.
Q: Is a mains filter included in the RD51.2-4B-007-L-NN-FW drive controller?
A: An integrated mains filter is provided with this drive controller to minimize electrical noise.
