RD51.1-4B-007-L-DF-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: R911203156
Ask for AvailabilityThe Bosch Rexroth Indramat RD51.1-4B-007-L-DF-FW is a drive controller from the RD 500 Drive Controllers series, designed with a built-in brake chopper and integrated mains filter. It supports U/f curve control and operates at a rated power of 7.5 kW with a voltage range of 380 to 480 volts. Forced air cooling is used, and the unit features a NAMUR terminal strip with an external 24 V stand-by power supply.
Internal Product Review
The RD51.1-4B-007-L-DF-FW is a well-executed drive controller with a 7.5 kW rating. Forced air cooling and an integrated mains filter support stable operation and clean system performance in industrial drive applications. A built-in brake chopper adds valuable control flexibility, highlighted by the 380 to 480 V operating range.
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Product Description:
The RD51.1-4B-007-L-DF-FW drive controller is produced by Bosch Rexroth Indramat and belongs to the RD 500 Drive Controllers series. It is intended to modulate the speed and torque of three-phase induction motors in automated machinery, providing regulated power conversion between the line supply and the motor circuits. By combining power electronics with application-oriented interface terminals, the unit functions as the central actuator in conveyor lines, material-handling modules, and general motion sequences where compact variable-frequency control is required. This operating role lets the drive start, accelerate, and decelerate connected motors with controlled electrical output rather than direct across-the-line switching.
The controller is fed by a three-phase line supply through a 3 × AC converter architecture and accepts line voltages from 380 to 480 V. Within this range, it tolerates supply fluctuations of ±10 %, allowing installation on facilities with moderate grid variation. Nominal output is rated at 7.5 kW, matching medium-frame motors commonly used in pump or fan stations. A built-in brake chopper dissipates regenerated energy during rapid deceleration, eliminating the need for an external braking module. The power section, current-filter feedback terminals (U6, V6, W6), and NAMUR stand-by supply are routed on the same baseplate, simplifying cabinet wiring and reducing impedance between components.
Motor flux is regulated with U/f curve control, a method that maintains a fixed voltage-to-frequency ratio for stable magnetization across the speed band. Thermal management relies on forced air cooling, and the integrated fan channels airflow over the heat sinks so enclosure temperatures remain within the permitted operating range during continuous duty. Line-side distortion is minimized by an integrated mains filter that attenuates high-frequency switching noise before it returns to the grid. This unit is design generation 1. That control approach is commonly used where smooth speed adjustment is more important than high-dynamic servo response, and the NAMUR terminal strip together with current-feedback diagnostics supports stable drive behavior under varying load profiles.
