RS51.1-4G-050-L-NN-FW Bosch Rexroth Indramat
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MPN: R911200139
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The Bosch Rexroth Indramat RS51.1-4G-050-L-NN-FW is a basic drive from the RD 500 Drive Controllers series. It features a rated power of 50 kVA, U/f curve control, and an integrated brake chopper and resistor. This drive uses forced air cooling and supports a voltage range of 380 to 480 V with a ±10% tolerance.
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Product Description:
The RS51.1-4G-050-L-NN-FW is a basic drive produced by Bosch Rexroth Indramat for the RD 500 Drive Controllers series. As a converter-based drive controller, it regulates three-phase induction motors in continuous-duty automation lines where speed is set by an adjustable frequency. The unit provides the power interface between the mains supply and the motor, executes scalar voltage-to-frequency regulation, and includes protective hardware for dynamic braking and line filtering. This operating method is well suited for conveyors, pumps, and fans that need adjustable motor speed without closed-loop servo control.
Its rated output is 50 kVA, allowing it to supply sizable production motors without derating. The input section accepts a three-phase mains range of 380 to 480 V and continues to operate properly when the line fluctuates by ±10 %. Because the supply category is a Converter 3 × AC, the device rectifies and inverts incoming utility power rather than using a DC bus from an upstream source. Motor voltage follows a U/f curve control profile, so stator flux remains stable across the speed range and the drive can support steady operation in constant-torque and variable-torque applications.
Thermal management relies on forced air cooling, and a rear-mounted fan draws cabinet air through the heatsink to remove switching losses generated at the rated current. DC overvoltage events are dissipated by the embedded braking stage identified as built-in brake chopper and resistor, eliminating the need for an external energy dump. Line-side disturbance is suppressed by the integrated mains filter, which helps reduce conducted noise on the incoming supply. This controller is classified as design generation 1 and uses the standard drive configuration for general industrial motor control.
Frequently Asked Questions about RS51.1-4G-050-L-NN-FW:
Q: Does the RS51.1-4G-050-L-NN-FW include a braking chopper and resistor?
A: The RS51.1-4G-050-L-NN-FW has a built-in brake chopper and resistor for braking requirements.
Q: What control method does the RS51.1-4G-050-L-NN-FW use?
A: This drive controller uses U/f curve control for motor management.
Q: What kind of cooling system does the RS51.1-4G-050-L-NN-FW feature?
A: Forced air cooling is employed in this drive to maintain optimal operation temperatures.
Q: What is the input voltage range for the RS51.1-4G-050-L-NN-FW drive controller?
A: The RS51.1-4G-050-L-NN-FW supports a voltage input range of 380 to 480 V.
Q: Is a mains filter included in the RS51.1-4G-050-L-NN-FW drive controller?
A: This model features an integrated mains filter, eliminating the need for an external filter solution.
