Product Description:

The RD52.1-4N-001-L-NN-P1-NN-FW is a drive controller built by Bosch Rexroth Indramat for the RD 500 Drive Controllers series. Acting as a closed-loop power electronics stage, it sits between a plant mains source and an AC motor to regulate speed and torque in automated equipment. By adjusting output frequency and current in real time, the unit helps production lines, packaging stations, and material-handling systems maintain stable motion while reducing the risk of overload or stall conditions. It is suited to variable-speed duty where repeatable acceleration and controlled deceleration are required throughout the operating cycle.

Electrical input is taken from a three-phase AC supply, and the permissible line span of 380 to 480 V matches common industrial power networks. The controller accepts line variation within a ±10% tolerance before issuing a fault, which helps it ride through minor fluctuations on the mains. Internally, torque regulation is handled through field-oriented vector control, so stator current components can be managed independently for responsive speed control across a broad operating range. Heat from the IGBT output stage is removed by forced-air cooling, with internal fans moving ambient air through cooling channels around the power section.

Power-quality performance is supported by an integrated mains filter that reduces high-frequency conducted noise returning to the supply. Because the unit is supplied without a built-in brake chopper, applications with frequent rapid deceleration may need an external braking resistor or another method to handle regenerative energy on the DC link. The hardware is in design generation 1, and the controller ships with no installed functions so communication or safety options can be selected according to the application. This arrangement allows the same power section to be used in different machine layouts where communication, feedback, or protection functions vary from one axis to another.