RD51.1-4B-037-L-LV-FW Bosch Rexroth Indramat
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MPN: R911201287
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The Bosch Rexroth Indramat RD51.1-4B-037-L-LV-FW is a drive controller in the RD 500 Drive Controllers series. It features a rated power of 37 kW, U/f curve control, and operates on a voltage range of 380 to 480 volts. The unit comes with a built-in brake chopper, forced air cooling, and an integrated mains filter.
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Product Description:
The RD51.1-4B-037-L-LV-FW is a drive controller produced by Bosch Rexroth Indramat and belongs to the RD 500 Drive Controllers series. It is intended for variable-speed operation of three-phase induction motors in factory automation lines, conveyor modules, and similar motion tasks. By converting incoming AC mains into a controlled output, the unit allows precise acceleration, deceleration, and steady-state speed regulation for coordinated machinery.
Rated output power is 37 kW, which indicates the maximum continuous motor power the inverter can supply under normal operating conditions. The supply terminals accept line voltages from 380 to 480 V, so the unit can be connected to standard industrial power networks. A tolerance of ±10% allows operation through common input-voltage variation caused by transformer settings or changing plant loads. The rectifier section is designated as Converter 3 x AC, meaning the drive accepts three-phase AC input and internally converts it for variable-frequency motor control. Heat from the power semiconductors is removed by forced air cooling, with an internal fan moving ambient air across the heat sinks to keep operating temperatures within an acceptable range.
Dynamic braking is handled by a built-in brake chopper, which redirects regenerative energy to an external resistor during rapid deceleration so the DC bus voltage does not rise excessively. Motor flux is controlled through U/f curve control; this open-loop method links output voltage to frequency for applications that do not require encoder feedback. An external auxiliary source can maintain control electronics through the 24 V standby power input during cabinet emergency conditions. The drive also supports cable-damping feedback (C3, D3), which helps reduce oscillation effects that can occur with long motor cables in distributed installations.
Frequently Asked Questions about RD51.1-4B-037-L-LV-FW:
Q: Does the RD51.1-4B-037-L-LV-FW include a brake chopper?
A: The RD51.1-4B-037-L-LV-FW has a built-in brake chopper for energy dissipation during braking cycles.
Q: Is a mains filter included on the RD51.1-4B-037-L-LV-FW drive controller?
A: This drive controller comes with an integrated mains filter for reduced electrical interference.
Q: What is the rated power output of the RD51.1-4B-037-L-LV-FW controller?
A: The RD51.1-4B-037-L-LV-FW is rated for a power output of 37 kW.
Q: How is the RD51.1-4B-037-L-LV-FW drive controller cooled?
A: This model uses forced air cooling to maintain optimal operating temperature.
Q: What input voltage range does the RD51.1-4B-037-L-LV-FW support?
A: It operates within a voltage range of 380 to 480 V AC in a 3-phase configuration.
