RD51.1-4B-001-L-V1-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: R911200254
Ask for AvailabilityThe Bosch Rexroth Indramat RD51.1-4B-001-L-V1-FW is a drive controller from the RD 500 Drive Controllers series. It features U/f curve control, forced air cooling, and operates within a voltage range of 380 to 480 V with a ±10% tolerance. The controller includes an integrated mains filter, built-in brake chopper, and supports external 24 V stand-by power.
Internal Product Review
The RD51.1-4B-001-L-V1-FW is a Bosch Rexroth Indramat drive controller designed for 3 x AC converter applications with a 380 to 480 V input range. U/f curve control and a built-in brake chopper give this unit dependable motor handling and solid braking performance in standard drive systems. Forced air cooling with an integrated mains filter supports stable cabinet operation, making this controller a strong fit for industrial installations.
Have a part to sell?
Wake Industrial Warranty
To contact sales for pricing and lead time:
Payment Methods
Shipping Methods
Our Credentials
Product Description:
The RD51.1-4B-001-L-V1-FW is a drive controller manufactured by Bosch Rexroth Indramat and distributed under the RD 500 Drive Controllers series. It is used in industrial automation to regulate induction motor speed and torque so production machinery can match mechanical demand while maintaining electrical efficiency. Positioned between the line supply and the motor, the unit performs frequency conversion, operating monitoring, and protective functions required for continuous plant operation. This arrangement allows conveyors, pumps, fans, and other process equipment to run at the commanded speed instead of operating only at fixed line frequency.
The controller operates on line voltages from 380 to 480 V and tolerates supply fluctuations of ±10%, which helps it remain stable when facility power varies. Its input stage is a three-phase AC converter, and motor excitation is managed by U/f curve control so the stator voltage stays proportional to frequency across the speed range. By rectifying incoming power and reconstructing a variable-frequency output, the drive can adapt motor operation to changing process loads without relying on mechanical speed-changing devices. Rapid deceleration is handled by a built-in brake chopper that diverts regenerated energy to an external resistor and helps prevent DC-bus overvoltage. The unit is built in generation 1, matching the first release of this platform.
Thermal management uses forced air cooling, and a factory-installed fan moves cabinet air across the heat sink to keep semiconductor temperatures within their operating limits. Control logic remains active during main-power loss because an auxiliary input supplies 24 V standby power, which helps preserve parameter memory and communication until line voltage returns. This separate standby supply also helps the control section remain responsive during brief interruptions instead of resetting immediately after every disturbance. For electromagnetic compatibility, the unit includes an integrated mains filter, so additional external filtering is often unnecessary and cabinet wiring can remain compact.
