RD51.2-4B-005-L-NN-FW
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MPN: R911201289
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The RD51.2-4B-005-L-NN-FW is an AC drive with internal fan cooling and an integrated keypad/display. Manufactured by Bosch Rexroth Indramat as part of the RD 500 Drive Controllers, it operates on a three-phase input voltage of 380-480V AC. The drive features IP20 enclosure protection.
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Product Description:
Bosch RD51.2-4B-005-L-NN-FW Drive Controller is an efficient and robust frequency converter that is designed to control the speed of motors by transforming constant frequencies input power into variable frequency output and it uses U/F control method that make speed and torque control reliable and easy to manipulate where a constant frequency to voltage ratio is maintained.
The RD51.2-4B-005-L-NN-FW Drive Controller is engineered to consistently provide 8.6 kva of apparent power output which reflects its capacity to manage electrical load that combines both real and reactive power demands. It meets harsh electromagnetic compatible standards prescribed under international standards that entails little radio noise interference since its Level A1 noise suppression entails that it can be used in an environment where electromagnetic cleanliness will be highly needed when installed with the proper RZF input filter. It has an in-built dynamic braking circuit enabling safe transfer of any excessive regenerative energy generated in quick motor deceleration converting it to heat through a braking resistor, thus avoiding feed back to the power grid. It uses an active air-cooling to maintain thermal stability and uses internal fans or blowers to establish the air circulation over key heat generating parts to reduce the danger of overheating in continuous or high work operation.
This RD 500 series module is designed to be linked with supply systems ranging from 380 to 480 volts alternating current and it can adjust its output from a complete stop up to 250 hertz and thereby supporting both low speed torque applications and high frequency operations useful in wide industrial automation operations. It can temporarily manage up to 18 kilowatts at a time in one minute which is critical during the hard braking cycles, where the extra kinetic energy has to be dissipated almost immediately without compromising the components involved in the system.
Frequently Asked Questions about RD51.2-4B-005-L-NN-FW:
Q: How does the U/f control method improve motor performance in RD51.2-4B-005-L-NN-FW?
A: The U/f control ensures proportional voltage-to-frequency supply, reducing torque ripple and enhancing smooth speed variation. It's especially helpful in systems not requiring precise dynamic performance.
Q: Why is forced air cooling essential in Bosch RD51.2-4B-005-L-NN-FW during continuous operation?
A: Forced air cooling prevents thermal buildup on heat-generating components. This extends the system's lifespan and ensures reliable function under demanding industrial workloads.
Q: How does the integrated brake chopper improve operational safety in RD51.2-4B-005-L-NN-FW?
A: It safely redirects excess energy during deceleration to a braking resistor. This avoids power surges and protects both the converter and the connected motor.
Q: What advantage does a 0–250 Hz output frequency range offer in drive applications?
A: It allows a wide range of motor speeds for varying load conditions. This versatility is ideal for diverse tasks like conveyor belts or fans.
Q: Why is electromagnetic compatibility important in RD51.2-4B-005-L-NN-FW installations?
A: It minimizes signal interference with surrounding devices. This ensures stable performance in sensitive environments like labs or cleanroom facilities.
