RD51.2-4B-005-L-NN-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: R911201289
The Bosch Rexroth Indramat RD51.2-4B-005-L-NN-FW is a drive controller from the RD 500 Drive Controllers series. It features a built-in brake chopper, U/f curve control, and forced air cooling. This controller supports a voltage range of 380 to 480 V and has a rated power of 5.5 kW.
Internal Product Review
The RD51.2-4B-005-L-NN-FW is a Bosch Rexroth Indramat drive controller built for converter 3 x AC input and 5.5 kW rated power. U/f curve control and forced air cooling support stable drive behavior and dependable thermal management in continuous-duty applications. An integrated mains filter and built-in brake chopper make this unit a strong choice for clean installation and effective braking performance.
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Product Description:
The RD51.2-4B-005-L-NN-FW is a drive controller produced by Bosch Rexroth Indramat within the RD 500 Drive Controllers series. It converts three-phase line power into a variable output that regulates induction motors on conveyors, pumps, and fan modules used in automated plants. By adjusting frequency and voltage, the unit provides torque and speed control that fits process demands while reducing mechanical stress on connected machinery. Designed for cabinet installation, it forms the central power stage between the line side and the motor side in distributed control architectures. This arrangement allows standard plant motors to run at speeds matched to the process instead of operating only at full line frequency.
The controller delivers a continuous output of 5.5 kW, matching medium-size asynchronous motors often found on material-handling axes. It accepts a supply window of 380 to 480 V and is specified for a three-phase line because the power section is a three-phase AC converter. Incoming line fluctuations are allowed within ±10 %, permitting operation on networks with moderate voltage instability. A built-in brake chopper is present so regenerated energy during deceleration is dissipated through an external resistor instead of being returned to the DC link, which helps prevent overvoltage trips. This arrangement is useful where driven loads decelerate frequently and braking energy must be managed outside the motor.
The drive applies U/f curve control for open-loop speed adjustment, eliminating the need for encoder wiring on standard induction motors. Heat from the power stack is expelled by forced air cooling, so unobstructed airflow is required inside the enclosure. An integrated mains filter limits conducted interference to adjacent equipment. The hardware is marked as generation 2, aligning it with the latest option modules. With no additional technology functions installed, the unit focuses on straightforward voltage-to-frequency conversion. This control method is suited to standard motor applications that do not require position feedback.
