Product Description:

The RD52.1-7N-132-R-V1-FW belongs to the RD 500 Drive Controllers series manufactured by Bosch Rexroth Indramat. As a three-phase power stage, it interfaces with higher-level PLCs to regulate motor speed and torque in material-handling lines, process equipment, and coordinated motion cells. By receiving DC power from a common supply and switching it through insulated-gate devices, the controller creates controlled AC output that matches dynamic commands. This arrangement helps the drive respond to changing load demand, maintain commanded speed under process variation, and coordinate motion with the rest of the machine.

Core regulation is achieved through field oriented vector control, allowing independent adjustment of stator flux and torque-producing current for accurate response across the speed range. That control method improves low-speed behavior and helps the motor hold commanded torque during load changes. The drive is rated for loads up to 132 kW, so its semiconductor and bus architecture support high continuous current. The supply category is Inverter DC, and the unit accepts a bus window of 530 to 670 V for use with rectified 400 V or 480 V line systems. Thermal stability at this rating is maintained by liquid cooling with internal pump, which circulates coolant through integrated channels during sustained duty and removes heat from the power section efficiently.

The drive is delivered without a built-in brake chopper, so an external braking resistor or regenerative module is required when deceleration energy must be dissipated. The control electronics can remain energized by an auxiliary 24 V stand-by power source, allowing fieldbus communication and parameter access while the main bus is off. This also allows diagnostics and network access before the power section is enabled. Firmware must be ordered as a separate subposition to match the required function package. The device is categorized as Design Generation 1, which supports compatibility with first-generation RD 500 option cards and diagnostic tools.