Product Description:

The DM008K 1101-D is a servo drive module manufactured by Bosch Rexroth Indramat and included in the DM Servo Drives series. Designed for closed-loop motion control, the unit conditions a high-energy DC bus and delivers three-phase power to matched servo motors. By housing power electronics, fieldbus communication, and safety circuitry in a narrow module, it fits densely populated automation cabinets. Its function in an industrial line is to translate position and velocity commands from a central controller into precise current patterns that move machine axes with repeatable accuracy.

Electrically, the drive operates from a regulated bus of 670 VDC, derived from a separate rectifier stage, and distributes three-phase 400 V pulses to the motor terminals. Motion data are exchanged through a SERCOS optical link, enabling cycle times that match the inverter’s maximum output frequency of 800 Hz. Under continuous duty, the power section supplies 2.4 A of current, while internal losses are limited to 96.5 W, so forced-air cooling is sufficient. The upstream supply must provide 2.5 A DC on the main bus and 0.89 A at 24 V for logic power. A standard encoder interface accepts incremental or absolute feedback, and measurement resolution reaches 32 bits in the position loop with 20 bits used for velocity control.

The module body is only 50 mm wide, and the aluminum chassis weighs 6.0 kg, easing panel layout and handling. When a passive front-end is used, the upstream non-regulated link can rise to 715 VDC, a figure the drive’s insulation and DC capacitors can withstand without performance loss. Switching devices commutate at a carrier of 8 kHz, balancing acoustic noise with current ripple across the output stages. Connector placement groups the encoder, 24 V supply, and fiber ports to shorten cable runs inside the enclosure.