Product Description:

The DM 8K 3101-D is a servo drive module developed by Bosch Rexroth Indramat within the DM Servo Drives series. Designed for cabinet installation, it shapes DC link energy into controlled phase currents that run synchronous or induction servomotors used in automated handling, packaging, and metal-cutting stations. The drive handles velocity, torque, and position loops through its internal electronics and exchanges setpoints with a higher-level motion controller, providing a compact motion axis interface for industrial automation lines.

Control power is supplied through a 24 V rail, and the electronics draw 0.89 A, so auxiliary supply sizing remains straightforward. The main converter connects to a common DC bus; when the supply is unregulated the link reaches 715 VDC, while the internal chopper regulates it to 670 VDC during regenerative events to protect downstream modules. Output capability depends on switching frequency: at a 4 kHz PWM rate the drive delivers 5.7 Arms continuously, whereas the rating drops to 3.6 Arms at 8 kHz because higher carrier frequencies increase switching losses. Standard air cooling moves heat away from the power stage, and the compact mechanical build keeps total mass to 6.0 kg, allowing installation on light vertical rails without additional supports.

The derating slope is 0.15 A/K, so every degree Celsius above the reference temperature reduces continuous current by that amount. Power lost as heat peaks at 96.5 W, so cabinet ventilators must exhaust this energy to maintain stable semiconductor temperatures. The housing is only 50 mm wide, enabling high-density stacking of multiple axes on a single backplane. Command data are accepted through a 12-bit analog setpoint interface, while feedback comes in via the standard encoder socket; no additional functional options are included, so wiring remains uncomplicated.