RD51.1-4N-011-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: R911200202
The Bosch Rexroth Indramat RD51.1-4N-011-L-NN-FW is a drive controller from the RD 500 Drive Controllers series. It supports a voltage range of 380 to 480 V with a ±10% tolerance and uses U/f curve control. This unit features forced air cooling, an integrated mains filter, and does not have a built-in brake chopper.
Internal Product Review
The RD51.1-4N-011-L-NN-FW is a drive controller from the RD 500 series by Bosch Rexroth Indramat, featuring U/f curve control and an integrated mains filter for stable operation. Forced air cooling ensures effective temperature management, while the converter input supports a voltage range of 380 to 480 V. This model is well-suited for demanding industrial environments where reliable control and consistent power delivery are essential.
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Product Description:
The RD51.1-4N-011-L-NN-FW drive controller is produced by Bosch Rexroth Indramat in the RD 500 Drive Controllers series. It regulates three-phase induction motors by converting fixed-frequency mains power into a variable-frequency output suited for conveyor lines, pumps, and general factory motion tasks. Within an automation cabinet, it provides the interface between the control PLC and the motor terminals for either closed-loop or open-loop speed regulation. That arrangement allows the motor to run at the speed required by the process instead of being limited to direct line frequency. This type of control is commonly used where adjustable process speed is more important than very high servo-level response.
The controller operates with an input line rated at 380 to 480 V, allowing deployment on standard low-voltage industrial networks. It uses a three-phase AC supply, so it accepts alternating current from a three-phase source and internally converts it for motor excitation. Output frequency is modulated according to a U/f curve control method, which keeps the ratio between voltage and frequency constant so motor flux remains stable without vector feedback. Thermal management relies on forced air cooling, meaning a built-in fan moves airflow through the heat sink to remove switching losses. All power components are sized for operation within a ±10% tolerance of the nominal mains value, which helps the drive continue operating properly when plant voltage varies within the stated range.
Line-side harmonics are mitigated by an integrated mains filter, so no external EMC hardware is needed for standard installations. The integrated filter also helps reduce conducted noise on shared supply lines in typical cabinet installations. Because the drive is supplied without a built-in brake chopper, braking energy must be handled by an external chopper module when rapid deceleration is required. The drive is design generation 1, and the base layout leaves room for optional functions when the application requires them.
