Product Description:

The RD52.1-4N-001-L-V1-FW drive controller is manufactured by Bosch Rexroth Indramat and belongs to the RD 500 Drive Controllers series. As a converter module, it modulates three-phase mains power into a regulated output for synchronous or induction motors used in automated machinery. This unit supports motion axes that require closed-loop speed and torque regulation within distributed control systems and is often used in packaging lines or gantry loaders. By adjusting output voltage and frequency to match demand, it can handle acceleration, steady running, and deceleration on the same drive path.

It accepts a three-phase input in a range of 380 to 480 V, and the electronics are designed to tolerate fluctuations of ±10 %, allowing operation on utility grids with moderate variance. The power section is a 3 x AC converter, so it rectifies and inverts the incoming line to produce a variable-frequency output for the motor. Motor control uses field-oriented vector control, which calculates real-time flux and torque components for fast dynamic response and stable low-speed operation. Thermal management relies on forced air cooling; an internal fan channels airflow across the heat sink to keep semiconductor temperatures within safe limits during continuous use.

The unit is supplied without a built-in brake chopper, so external braking resistors or chopper modules are required when the connected motor must dissipate regenerative energy. An integrated mains filter attenuates conducted emissions, helping the cabinet meet EMC requirements without additional line filters. Control electronics can remain active through an auxiliary 24 V standby power input, permitting fieldbus communication, status monitoring, and parameter retention while the main supply is isolated. Application-specific features use separately ordered firmware. This arrangement allows the same hardware platform to be adapted to different control tasks.