RD51.1-4B-045-L-V1-FW Bosch Rexroth Indramat
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MPN: R911200037
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The 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.
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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.
Frequently Asked Questions about RD51.1-4B-045-L-V1-FW:
Q: Does the RD51.1-4B-045-L-V1-FW include an integrated brake chopper?
A: The RD51.1-4B-045-L-V1-FW has a built-in brake chopper for handling rapid deceleration and braking energy.
Q: How is the RD51.1-4B-045-L-V1-FW drive controller cooled?
A: This drive controller uses forced air cooling to maintain optimal operating temperature.
Q: What is the rated power output of the RD51.1-4B-045-L-V1-FW?
A: The RD51.1-4B-045-L-V1-FW has a rated power output of 45 kW.
Q: What is the supply voltage range for the RD51.1-4B-045-L-V1-FW?
A: It supports a supply voltage range from 380 to 480 V with a tolerance of ±10%.
Q: Is a mains filter integrated into the RD51.1-4B-045-L-V1-FW drive controller?
A: An integrated mains filter is included in this controller to help reduce electrical noise.
