Product Description:

The RD52.1-8N-022-L-V1-FW belongs to the RD 500 Drive Controllers series from Bosch Rexroth Indramat. This compact power electronics module regulates induction or synchronous motors used in conveyors, mixers, and other automated stations by converting a fixed DC bus into a variable three-phase output. Within an installation, the unit links a higher-level PLC to the motor shaft so speed and torque commands can be carried out with repeatable motion control during normal machine cycles. That operating role makes it suitable for equipment that needs controlled acceleration, stable running speed, and coordinated stopping without a separate motor starter.

The controller uses field-oriented vector control, so current is modulated according to real-time flux conditions and motor torque responds predictably to reference values. The power section is rated for 22 kW, which suits medium-sized production machinery with sustained load demand. An input range up to 700 V on the DC link matches common rectifier units used on higher-power lines, and the topology is described as a DC inverter because the module draws power from a shared direct-current bus instead of an internal rectifier stage. Thermal management relies on forced air cooling, with cabinet airflow directed across the heat sink to keep semiconductor temperatures within operating limits during cyclic loads. This cooling method supports continuous drive operation in enclosed panels where heat must be removed along a controlled airflow path.

The unit is supplied without a built-in brake chopper, so rapid deceleration requires an external chopper and resistor to absorb regenerated energy from the motor. Maintenance access is improved by 24 V standby power, which keeps the control electronics active for parameter access and status checks when the main bus is switched off. The hardware platform is identified as generation 1, so its diagnostics and control behavior follow the conventions of the first RD 500 release. This layout allows the control section to remain available independently of the main power stage during service or fault review.