Product Description:

The RD52.1-7N-015-L-NN-FW is a drive controller produced by Bosch Rexroth Indramat and assigned to the RD 500 Drive Controllers series. As a closed-loop power electronics module, the unit governs three-phase induction or synchronous motors in automated machinery. By converting a stable DC link into variable frequency and amplitude, it allows precise speed and torque regulation in production cells, conveyors, and processing lines. This operating method supports controlled motor response across changing load conditions and commanded speeds.

Its control core employs field-oriented vector control, enabling decoupled regulation of flux and torque for fast dynamic response. The controller operates from a DC link spanning 530 to 670 V, a range that matches standard 400 V mains when paired with a front-end rectifier. Under nominal conditions, it can deliver 15.0 kW of mechanical output to the connected motor and maintains current limits according to the RD 500 design rules. Thermal energy is removed from the heat sink by forced air cooling, so the cabinet layout must provide a clear flow channel for the internal fan assembly. Because the model is supplied without a built-in brake chopper, regenerative energy created during deceleration must be handled by an external resistor or fed back through a common DC bus.

The power stage is classified as Inverter DC, meaning it accepts an existing DC bus rather than rectifying AC on board, which simplifies shared-bus multi-axis installations. The unit is part of Design Generation 1, so the selected control software and parameter set must match that generation. It is supplied without optional modules, leaving space in the enclosure for future interface cards or safety modules if the application requires additional I/O. The available macros and diagnostics in the RD 500 tool set must match the installed control package so that functions and menus remain consistent during setup and operation.