RD51.1-4B-001-L-D1-FW Bosch Rexroth Indramat
Wake Industrial LLC is not an authorized distributor of this product.
Wake Industrial LLC is not an authorized distributor of this product.
MPN: R911200489
Ask for AvailabilityThe Bosch Rexroth Indramat RD51.1-4B-001-L-D1-FW is a drive controller from the RD 500 Drive Controllers series. It features U/f curve control, a built-in brake chopper, and an integrated mains filter. This design supports converter 3 x AC supply and operates with a voltage range of 380 to 480 V.
Internal Product Review
The RD51.1-4B-001-L-D1-FW is a Bosch Rexroth Indramat drive controller designed for converter 3 x AC operation across a 380 to 480 V range. Forced air cooling and an integrated mains filter support stable performance in demanding drive applications. The built-in brake chopper and U/f curve control make the unit a strong choice for dependable motor control.
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Product Description:
The Bosch Rexroth Indramat RD51.1-4B-001-L-D1-FW is a drive controller in the RD 500 Drive Controllers series. It is engineered for closed-loop speed and torque regulation of standard AC motors used on conveyors, mixers, and packaging stations. By converting fixed-frequency mains power into a variable output, the unit lets automation systems match motor performance to process requirements while protecting connected equipment from high inrush currents. This control approach also supports smoother starts and speed changes in equipment that runs under varying load conditions. It is suitable for applications that need repeatable motor response without the complexity of servo-level positioning hardware.
This model incorporates a built-in brake chopper that diverts regenerated energy to a resistor when the motor decelerates, helping prevent DC-link overvoltage. Output magnitude follows a U/f curve control method, so voltage changes in proportion to frequency to maintain motor flux through the operating range. Thermal management relies on forced air cooling, and the housing uses a fan to move air across internal heat sinks. An integrated mains filter lowers conducted emissions and helps the installation meet electromagnetic compatibility limits. The permissible supply window is 380 to 480 V, and the input may fluctuate within a ±10% tolerance without derating the controller.
The unit is listed as Design generation 1, which identifies the product generation used for its dimensions and connection layout. The controller uses firmware ordered as a separate subposition, allowing the software selection to match the intended application. The terminal section includes a NAMUR terminal strip for straightforward connection of standardized sensor loops, and the internal power logic can remain active from an external 24 V standby supply. Three-phase power enters through a 3 × AC converter input stage that rectifies and smooths the mains before pulse-width modulation occurs. This arrangement supports stable motor operation across light and heavy loads without adding unnecessary wiring complexity.
