Product Description:

The RD52.2-4B-005-P-A2-FW is a controller built by Bosch Rexroth Indramat and assigned to the RD 500 Drive Controllers series. Within an automation cell, it converts three-phase mains power to regulated motor voltage, letting PLCs execute speed and torque commands without mechanical contactors. By using vector algorithms, the unit stabilizes current, improves dynamic response, and keeps induction or permanent-magnet machines operating within set limits during acceleration, steady running, or controlled deceleration under changing load conditions.

For closed-loop regulation, the controller applies field-oriented vector control, allowing independent adjustment of flux and torque components in the motor windings. Its input window of 380 to 480 V AC matches common industrial feeders, and the output has a nominal rating of 5.5 kW, which suits medium-frame pumps, conveyors, and process drives. Excess kinetic energy from overhauling loads is routed through a built-in brake chopper, avoiding DC-bus overvoltage without external hardware. Thermal energy from the power section is removed through a heat dissipation panel for outputs up to 18.5 kW, so cabinet airflow only needs to handle residual heat. Harmonic emissions are limited by an integrated mains filter, which reduces conducted noise on supply lines. During startup or maintenance, speed, current, and position commands remain inhibited by a starting lockout that works independently of the motion program.

System integration is simplified because the supply is a three-phase AC converter with phase-to-phase voltage tolerance of ±10 %, preventing nuisance trips when plant voltage drifts. Control electronics can remain energized through external stand-by power, so parameter files stay accessible while the power section is isolated. Design generation 2 introduces refined gate drivers and expanded diagnostics for clearer fault handling. This arrangement keeps operating information available even when the motor circuit is switched off.