Product Description:

The RD52.1-4N-037-L-NN-FW is a drive controller produced by Bosch Rexroth Indramat within the RD 500 Drive Controllers series. Designed to sit between the plant PLC and an induction or synchronous motor, the unit regulates torque and speed to match process demands in automated cells, conveyors, or machining centers. Its modular housing allows installation in multi-axis cabinets, and the controller interfaces with typical sensor buses for closed-loop feedback during continuous operation. Parameter sets are stored in nonvolatile memory, so operating data remains available after power is removed and can be recalled when the drive is started again.

Electrically, the controller employs field-oriented vector control, allowing direct regulation of stator currents for dynamic response across the speed range and smoother performance during load changes. It is powered from a Converter 3 x AC line and accepts phase-to-phase voltages between 380 to 480 V. This model is rated for continuous motor output up to 37 kW, so it can handle mid-frame pumps, fans, and extruders in variable-speed service where steady torque control is required. Input variations are tolerated within ±10 % of nominal, which helps the unit remain operational where supply conditions are not perfectly stable.

Thermal management is handled by forced air cooling, with the fan channel directing flow across the heat sink for continuous dissipation during sustained operation and repeated load changes. The power section is delivered without a built-in brake chopper, so any dynamic braking resistor must be installed externally if rapid deceleration is required. Line emissions are reduced by an integrated mains filter, which simplifies cabinet wiring by reducing the need for separate external filtering components. The mechanical layout and parameter structure correspond to generation 1 of the RD52 platform, and no optional technology functions are equipped.