Product Description:

The Bosch Rexroth Indramat RD51.2-4B-015-L-NN-FW is a drive controller in the RD 500 Drive Controllers series. As a stand-alone component in multi-axis automation, it converts three-phase mains power into a regulated output that varies both voltage and frequency so an induction motor can follow commanded speed profiles. In production lines, conveyors, or pump stations, the unit provides programmable acceleration, deceleration, and steady-state operation while monitoring energy feedback and thermal load.

Electrically, the controller accepts a three-phase input within a 380 to 480 V window, which lets a plant operate on common industrial grids without step-up transformers. The supply section is a Converter 3 × AC, meaning the rectifier and DC link process three-phase alternating current directly. Its continuous shaft capability reaches 15.0 kW, so motors drawing roughly 30 A at nominal conditions can be driven from a single frame size. A tolerance of ±10 % on mains variation helps keep the output stable when line voltage fluctuates. Command generation follows U/f curve control, which maintains the ratio between stator voltage and frequency to preserve magnetic flux across the speed range.

A built-in brake chopper dissipates regenerated energy into an external resistor, preventing DC-link overvoltage during rapid motor braking. Internal channels guide air through the heat sink, and forced air cooling maintains semiconductor junction temperatures without external liquid circuits. To suppress conducted interference, the unit uses an integrated mains filter that attenuates differential and common-mode noise at the input terminals. The housing is design generation 2, which keeps mounting dimensions and parameter menus consistent with later RD 500 accessories. The functions slot is not equipped.