Product Description:

The RD52.1-4N-004-L-NN-FW belongs to the RD 500 Drive Controllers series developed by Bosch Rexroth Indramat. It is used in industrial automation to regulate torque and speed on three-phase motors, linking higher-level PLCs with the power stage that drives the equipment. By combining signal processing with power conversion, the unit serves as the central control element in conveyor, packaging, and machining lines that demand precise closed-loop motor behavior. This arrangement helps the drive respond quickly to load changes while maintaining stable motor operation during continuous production.

This controller executes motor modulation through field-oriented vector control, allowing independent adjustment of flux and torque components for accurate dynamic response. The power section accepts a line supply of 380 to 480 V and uses a three-phase AC converter configuration, meaning it rectifies a three-phase mains input before generating a variable-frequency output. Momentary input variations of ±10% are permitted, which eases installation on distribution systems with modest voltage swing. Thermal management relies on forced air cooling, and an internal fan moves ambient air across heat-sink fins to remove switching losses. For electromagnetic compatibility, an integrated mains filter suppresses conducted emissions so additional external filtering is usually unnecessary.

The power stage is supplied without a built-in brake chopper, so external braking hardware is required whenever rapid deceleration or overhauling loads must dissipate regenerated energy. When an application returns braking energy to the DC bus, that external dissipation path helps prevent overvoltage during stopping cycles. The unit is Design generation 1, matching the connector style and component layout used in first-generation RD 500 modules. Control software is not factory preloaded, and it is ordered separately so the selected version can match the installed option cards and system requirements.