Product Description:

The RD52.1-4B-001-D-NN-FW is a drive controller manufactured by Bosch Rexroth Indramat and included in the RD 500 Drive Controllers series. It regulates three-phase induction and synchronous motors in automated machinery, giving the connected system closed-loop speed and torque control during changing process demands. This type of control suits conveyor lines, packaging stations, and material-handling equipment where stable motor response is needed during acceleration, deceleration, and steady-state operation. The controller is intended for industrial installations that require compact power conversion and consistent motor regulation.

The unit is supplied from a three-phase network of 380 to 480 V, and its input stage is a Converter 3 x AC type that rectifies and inverts mains power for motor operation. Motor regulation uses field-oriented vector control, which tracks rotor flux so torque remains accurate during load changes and low-speed operation. For controlled deceleration, a built-in brake chopper routes regenerated energy to an external resistor instead of returning it directly to the supply. An integrated mains filter helps reduce conducted interference on the plant power lines, which supports cleaner electrical operation in shared industrial cabinets.

Heat is removed with a plug-through cooler, which transfers losses efficiently and helps limit heat buildup inside the cabinet on frame sizes rated up to 110 kW. The controller is part of Design generation 1, so its parameter menus and connector layout match other first-generation RD 500 units. DC-link voltage tolerance is held within ±10%, giving predictable electrical margin for braking resistor and fuse sizing. The controller is supplied with unequipped extension slots, leaving space for encoder interfaces, I/O cards, or communication modules when those functions are needed.