RD51.2-4B-005-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: R911201270
Ask for AvailabilityThe Bosch Rexroth Indramat RD51.2-4B-005-L-A2-FW is a drive controller from the RD 500 Drive Controllers series with a rated power of 5.5 kW. It uses a built-in brake chopper, forced air cooling, and supports a voltage range of 380 to 480 V with a ±10% tolerance. The controller features U/f curve control, an integrated mains filter, and is designed as a converter for 3-phase AC supply.
Internal Product Review
The RD51.2-4B-005-L-A2-FW is a Bosch Rexroth Indramat drive controller built for converter 3 x AC operation across a 380 to 480 V range. U/f curve control and a built-in brake chopper support stable motor handling and dependable deceleration in demanding applications. Forced air cooling promotes thermal stability, and the 5.5 kW rating makes this unit a strong choice for continuous industrial service.
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Product Description:
The RD51.2-4B-005-L-A2-FW is a controller manufactured by Bosch Rexroth Indramat and positioned within the RD 500 Drive Controllers series. The unit interfaces with three-phase induction motors used in material-handling lines, machine tools, and other automated equipment. It is suited to applications that need smooth starts, controlled acceleration, and adjustable running speed during normal production. By converting fixed-frequency line power into variable-frequency output, it gives the connected motor a wider usable speed range than across-the-line operation. This helps the drive system match motor speed and torque to changing load demands while reducing mechanical wear.
This controller connects to industrial power networks through a voltage range of 380 to 480 V and uses a three-phase AC converter input, meaning it rectifies and inverts three-phase line power. Output capability reaches 5.5 kW, which suits medium-sized pumps, fans, or conveyors that need variable-speed operation. This power level fits general industrial drive tasks without requiring the larger cabinet space of a higher-output unit. Line fluctuations are handled through a ±10 % tolerance so operation remains stable when supply conditions vary within normal industrial limits. Thermal losses are removed by forced-air cooling, which moves cabinet airflow across the heat sink to protect semiconductor junctions during continuous duty.
For braking events, a built-in brake chopper channels regenerative energy into external resistors to prevent DC-link overvoltage during deceleration. This arrangement helps absorb returned energy when loads slow quickly or when rotating inertia pushes power back into the drive. Motor flux is regulated by U/f curve control, a scalar method that pairs voltage with frequency for predictable torque across the speed range. Harmonic disturbances on the supply side are reduced by an integrated line filter, allowing installation without extra line reactors in many panels. Motion can be disabled through external standby power circuitry and a starting lockout function.
