RD51.1-4B-045-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: R911200037
Ask for AvailabilityThe Bosch Rexroth Indramat RD51.1-4B-045-L-V1-FW is a drive controller in the RD 500 Drive Controllers series with a rated power of 45 kW and operates on a voltage range of 380 to 480 V. It features a built-in brake chopper, integrated mains filter, and uses forced air cooling. The controller supports U/f curve control and requires 24 V external stand-by power.
Internal Product Review
The RD51.1-4B-045-L-V1-FW is a drive controller with U/f curve control and a 45 kW rated power. Forced air cooling and an integrated mains filter support stable operation, making this RD 500 unit a strong choice for dependable industrial drive service.
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Product Description:
The RD51.1-4B-045-L-V1-FW is a drive controller from Bosch Rexroth Indramat within the RD 500 Drive Controllers series. This unit regulates the speed and torque of three-phase induction motors used in conveyors, pumps, mixers, and material-handling lines. It forms the closed-loop interface between the plant programmable logic controller and the motor terminals, translating digital commands into variable-frequency output while monitoring current, temperature, and input line status. This arrangement lets the drive respond to changing load demand without direct switching at the motor terminals. Generation 1 hardware shares a common mechanical footprint with later versions, which helps keep cabinet layouts consistent when a system is expanded.
For power handling, the controller delivers 45 kW of rated output and accepts line voltages in the 380 to 480 V range, which matches many industrial supply systems. The permissible supply fluctuation is ±10%, allowing operation on grids with moderate voltage instability. Motor flux is managed by U/f curve control, a method that scales stator frequency with voltage so the magnetic field remains stable during speed changes. Dynamic braking energy is dissipated through a built-in brake chopper, so no external resistor switchgear is required. All power electronics use forced air cooling, so the installation must maintain unobstructed airflow through the heat sink outlet.
Clean input power is supported by an integrated line filter, which attenuates high-frequency noise returning to the supply. During shutdown of the main converters, an auxiliary circuit provides 24 V standby power from an external source, keeping the control electronics active for fieldbus communication, status retention, or safety monitoring. The unit is fed from a 3 x AC converter system, matching common industrial three-phase networks. Generation 1 electronics keep control functions separate from the power stack, so parameter changes can be made without altering the main power section during normal updates.
