Product Description:

The DM 8K 9101-D is a servo drive module produced by Bosch Rexroth Indramat for the DM Servo Drives series. As an integral part of a closed-loop motion system, it converts high-voltage DC bus energy into a precisely modulated three-phase output that commands synchronous or asynchronous servomotors. By executing current, speed, and position loops in real time, the unit enables coordinated movement of axes in packaging, printing, or assembly equipment and forms the electrical interface between the machine controller and the mechanical load. This operating method supports repeatable acceleration, deceleration, and position control during frequent machine cycles.

The electrical data show how the drive interacts with its supply and motor windings. A 24 V control rail draws 0.89 A for logic, while the main DC bus is fed from an external rectifier. The enclosure carries an IP20 rating that limits solid ingress but requires cabinet installation, and air cooling through the heat sink removes switching heat. Communication with the motion controller uses the CANopen/CANrho fieldbus. At the factory preset switching frequency, the inverter delivers 3.6 Arms continuously, reaches 7.1 Arms in closed-loop peaks, and permits 10 Arms for brief open-loop surges. These current levels suit motors that can tolerate short overloads, and climatic category 3K3 permits operation in dry, non-condensing control rooms.

The link voltage is regulated at 670 VDC yet can rise to 715 VDC during braking. Switching occurs at 8 kHz, balancing current ripple and device heating. At this rate, the drive dissipates up to 96.5 W, and that heat is removed by the integrated fan. The drive has a compact mechanical design with a 50 mm module width, which supports dense cabinet layouts where several axes are installed side by side. The unit weighs 6.0 kg and tolerates shocks to 15 g without component shift.