RD51.2-4B-003-L-DF-FW Bosch Rexroth Indramat
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MPN: R911201335
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The Bosch Rexroth Indramat RD51.2-4B-003-L-DF-FW is a drive controller from the RD 500 Drive Controllers series. It features a rated power of 3.0 kW, a voltage range of 380 to 480 V with ±10% tolerance, and uses forced air cooling. The controller includes a built-in brake chopper, a NAMUR terminal strip with 24 V stand-by power, and operates with converter 3 x AC supply.
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Product Description:
The RD51.2-4B-003-L-DF-FW is a drive controller produced by Bosch Rexroth Indramat as part of the RD 500 Drive Controllers series. In an automation cell, it interfaces between the mains and a three-phase induction motor, providing controlled voltage and frequency so that machine axes, pumps, or conveyors follow command references rather than line frequency. By executing real-time adjustments, the device maintains constant torque, minimizes mechanical shock during starts, and supports coordinated motion in material-handling and continuous-process production lines.
At a rated output of 3.0 kW, the controller processes power from a three-phase AC supply. The input window of 380 to 480 V allows operation on common industrial networks, and a line variation of ±10 % can be tolerated without derating. Internally, it uses U/f curve control, so the stator voltage rises proportionally with frequency and magnetizing flux remains stable under variable-speed operation. The drive is built on generation 2 hardware, which improves memory capacity and diagnostic capability. These ratings support motors up to 7.5 A nominal current.
Protective and interface functions are integrated into the housing. A built-in brake chopper dissipates regenerated energy during rapid deceleration, preventing DC-link overvoltage. Thermal stability is maintained by forced air cooling, which routes cabinet air across the heat sink in a controlled path. Line disturbances are attenuated by an integrated mains filter, reducing conducted emissions toward the utility. Control wiring terminates on a NAMUR terminal strip with external 24 V standby power, so status signals can remain available when the main bus is isolated. Additional current-filter feedback on U6, V6, and W6 is available for oscilloscope or drive analyzer connections.
Frequently Asked Questions about RD51.2-4B-003-L-DF-FW:
Q: Does the RD51.2-4B-003-L-DF-FW drive controller have a brake chopper?
A: The RD51.2-4B-003-L-DF-FW controller includes a built-in brake chopper for handling dynamic braking requirements.
Q: What control method does the RD51.2-4B-003-L-DF-FW use?
A: This drive controller operates using U/f curve control for motor regulation.
Q: How is the RD51.2-4B-003-L-DF-FW drive controller cooled?
A: The RD51.2-4B-003-L-DF-FW uses forced air cooling to maintain operating temperatures.
Q: What input voltage range does the RD51.2-4B-003-L-DF-FW support?
A: It supports a voltage range between 380 and 480 volts for power input.
Q: What is the rated power output of the RD51.2-4B-003-L-DF-FW?
A: The rated power output for this drive controller is 3.0 kW, suitable for moderate motor loads.
