Product Description:

The RD52.1-4B-030-L-NN-G2-T1-FW is a drive controller produced by Bosch Rexroth Indramat for the RD 500 Drive Controllers series. The unit converts line power to a regulated three-phase output that coordinates motor speed and torque in conveyors, extruders, and general automation axes. Acting as an intermediate power module inside control cabinets, it interfaces with higher-level PLCs through standard drive-bus connections and performs real-time current regulation to keep motion stable when load or supply conditions change.

Incoming mains must lie within a phase-to-phase span of 380 to 480 V, and the drive tolerates deviations of up to ±10 % without derating. At that supply range, the power section can deliver a continuous mechanical output equivalent to 30 kW. The control scheme uses field-oriented vector control, allowing decoupled adjustment of torque-producing and flux-producing currents. This technique reduces response time during speed changes and improves low-speed torque linearity, which is useful when pairing the controller with high-inertia production rollers or lift mechanisms. These variables can be adjusted through the front keypad or over a serial interface, allowing local or remote tuning.

Thermal management is provided by forced-air cooling, and fans drive airflow across the heat sink so installation space is reduced compared with liquid-cooled variants. A built-in brake chopper is included to dissipate regenerated energy during rapid deceleration, removing the need for an external braking module. To limit conducted emissions, an integrated mains filter is fitted on the input stage. The power bridge uses a three-phase AC converter topology, which helps maintain symmetrical loading of the plant transformer. The unit is built to design generation 1, which corresponds to the T1 configuration and uses a consistent connector layout.