Product Description:

The RD51.1-5B-007-L-V1-FW belongs to the RD 500 Drive Controllers series manufactured by Bosch Rexroth Indramat. It is a dedicated drive controller that converts fixed-frequency AC line power into a variable output for induction motors, enabling closed-loop speed control in conveyor lines, pumps, and general motion axes within automated equipment. This arrangement allows the connected motor to run over a controlled speed range while responding to changing process demands.

The drive regulates motor flux through U/f curve control, a method that keeps the voltage-to-frequency ratio constant so magnetic saturation is avoided during acceleration and low-speed operation. Thermal loading is managed by forced air cooling, which directs cabinet airflow across internal heat sinks to remove losses generated by the power semiconductors. A built-in brake chopper dissipates regenerated energy into an external resistor bank, helping prevent DC-bus overvoltage during rapid deceleration. Continuous shaft output is rated at 7.5 kW, which matches medium-frame motors used on material-handling lines. The power section accepts a 3 × AC converter input, so it connects directly to a three-phase rectifier module that charges the intermediate circuit without a separate transformer.

Line connection is specified for a 500 V bus, giving enough headroom for the modulation index needed at peak torque while remaining below typical 575 V insulation limits. If the main supply is isolated, an external 24 V standby power input keeps the control electronics active so stored parameters and fieldbus communication remain available. The software is not embedded, so firmware must be ordered as a separate subposition for operation. The unit is design generation 1, which matches first-generation RD 500 option cards and related setup utilities.