RD51.2-5B-003-L-A2-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: R911201385
The Bosch Rexroth Indramat RD51.2-5B-003-L-A2-FW is a drive controller in the RD 500 Drive Controllers series. It offers a rated power of 3.0 kW and supports a voltage range of 500 V. This controller features U/f curve control with a built-in brake chopper and uses forced air cooling.
Internal Product Review
RD51.2-5B-003-L-A2-FW is a Bosch Rexroth Indramat drive controller that stands out for dependable U/f curve control and clean converter 3 x AC integration. Forced air cooling and a built-in brake chopper support stable thermal management and effective deceleration handling in demanding drive applications. The 500 V platform and 3.0 kW rating make the unit a strong choice for compact industrial motion systems.
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Product Description:
The RD51.2-5B-003-L-A2-FW is produced by Bosch Rexroth Indramat and belongs to the RD 500 Drive Controllers series. As a cabinet-mounted drive controller, it converts fixed mains power into variable-frequency output so induction motors can follow process setpoints in automated lines, presses, and conveying equipment. Its role in the RD platform is to provide adjustable motor speed where coordinated process control is needed, rather than precise servo-style positioning. Because it is intended for enclosure installation, the unit suits protected control cabinets used in industrial drive systems. It is part of the second design generation of this product line.
The controller accepts a 3 x AC converter supply and is specified for grids up to 500 V. Within that range, it can provide about 3.0 kW of continuous mechanical output, which suits small to mid-frame motor applications. Speed regulation uses U/f curve control, a scalar method that keeps motor flux stable over the operating range without requiring encoder feedback. This approach is commonly used where reliable variable-speed operation is needed without a closed-loop feedback device. Heat from switching losses is removed by forced air cooling, so the intake and exhaust paths must remain unobstructed during operation. Dynamic braking energy is handled by a built-in brake chopper, which supports deceleration on loads that return energy to the DC link.
The control section can remain active through external standby power when the main bus is isolated, which helps preserve access to status functions while motor power is unavailable. The drive also includes a starting lockout that blocks unintended motor startup after a fault or emergency stop. Application software is supplied as a separate order item, allowing the selected function set to match the intended process. This separation keeps the hardware description distinct from the software package installed in the controller. Different software packages can therefore be selected for different machine behaviors.
