Product Description:

The RD52.1-7N-022-D-V1-FW is manufactured by Bosch Rexroth Indramat and belongs to the RD 500 Drive Controllers series. The device converts a stabilized DC link into a regulated three-phase output so that induction or synchronous motors can be speed- and torque-controlled in automated machinery, conveyors, and processing equipment. In this role, it serves as the power stage between the upstream DC supply and the connected motor. That arrangement suits cabinet-based systems that need controlled acceleration, stable running speed, and repeatable torque response.

This controller delivers a continuous output of 22 kW, giving it enough headroom for medium-power pumps, fans, or extruders. It operates on a DC bus between 530 to 670 V, allowing it to function behind common rectifier modules fed from 400 V class mains. The supply category is Inverter DC, meaning the unit expects a precharged DC link rather than direct line-side wiring. Motor regulation is handled with field-oriented vector control, which keeps stator and rotor flux aligned for improved low-speed torque response and stable operation under changing load. Thermal energy is removed through a plug-through cooler for units up to 110 kW, so the heat sink projects outside the cabinet and transfers heat directly to ambient air. This layout moves most generated heat away from the enclosure interior.

The power section is delivered without a built-in brake chopper, so external resistor circuitry is required when rapid deceleration or overhauling loads are present. An auxiliary 24 V standby power input keeps the control electronics active when the main DC bus is off, preserving communication functions and diagnostic memory. The product is part of Design Generation 1, which is used to match compatible option cards and control features. The required firmware is ordered as a separate subposition and must be selected separately for the needed control and communication functions.