Product Description:

The Bosch Rexroth Indramat RD51.1-5B-005-D-D1-FW belongs to the RD 500 Drive Controllers series. It is an AC drive that modulates power between a three-phase supply and an induction motor, allowing speed and torque to be regulated in automated machinery. In production equipment, the controller converts fixed mains frequency into a variable output so conveyors, pumps, and fans can be matched to process demand while reducing mechanical stress during operation.

Its rated output is 5.5 kW, which is the continuous power it can supply to a connected motor under normal operating conditions. The unit supports a 500 V input network for direct use on suitable industrial power systems. As a three-phase AC converter, it rectifies the incoming line supply, builds a DC link, and then generates a variable-frequency output for motor operation. Speed regulation is handled through U/f curve control, which keeps voltage proportional to frequency to maintain stable motor magnetization. During rapid deceleration, a built-in brake chopper diverts excess DC-link energy to an external resistor to help prevent overvoltage faults.

The cooling concept uses a plug-through cooler for units up to 110 kW, so the heat sink passes through the cabinet wall and transfers losses to the air outside the enclosure. Field wiring terminates on a NAMUR terminal strip, which provides standardized signal connections for interlocks and status contacts. An external 24 V stand-by power connection keeps the control electronics active when the main supply is off, allowing diagnostic functions and shutdown control to remain available. The drive is part of design generation 1, which identifies the first hardware release for this version. This layout supports cabinet integration where heat removal and control access must remain separate from the main power section.