DM 004K 1101-D Bosch Rexroth Indramat
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The Bosch Rexroth Indramat DM 004K 1101-D is a servo drive from the DM Servo Drives series with a regulated DC link voltage of 670 VDC and a 6.0 kg mass. It offers a rated current of 4.0 Arms at 4 kHz and supports encoder types including STG, MTG, and gear encoder. The module features a SERCOS setpoint interface and provides a maximum power loss of 96.5 W.
Internal Product Review
The DM 004K 1101-D is a Bosch Rexroth Indramat servo drive with a regulated 670 VDC DC link and a SERCOS setpoint interface. Rated performance is well suited for precision motion duty, with 4.0 Arms at 4 kHz and support for STG/MTG/gear encoder feedback. The 1 MHz incremental limit is a standout spec for high-response servo applications.
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Product Description:
The DM 004K 1101-D is a servo drive manufactured by Bosch Rexroth Indramat within the DM Servo Drives series. Designed for cabinet mounting, the unit forms the power and control link between a SERCOS motion controller and a synchronous motor. It converts DC bus energy into precise three-phase outputs that execute speed, torque, and position commands in automated machinery.
The drive operates from a regulated DC link of 670 VDC, giving it the overhead needed for fast current transients and wide speed ranges. At a 4 kHz pulse-width modulation frequency, it delivers a continuous phase current of 4.0 A RMS, while the short-term ceiling reaches 6.6 A RMS for acceleration or disturbance rejection. Internal power dissipation is limited to 96.5 W, so cabinet ventilation must extract this heat to keep the electronics within the permitted temperature range. The module has a compact width of 50 mm, which allows high-density stacking on backplanes and reduces the required cabinet space. When the switching frequency is increased to 8 kHz, current capability decreases by 0.10 A per kelvin, whereas the standard-frequency decrease is 0.15 A per kelvin, allowing predictable current adjustment at high ambient temperatures.
The control section draws 0.89 A from the 24 V auxiliary supply, which helps with sizing control power buses in multi-axis systems. Position feedback is accepted at an incremental frequency of up to 1 MHz, supporting high-speed resolver-to-digital converters and fine interpolation. For multi-turn feedback, the MTG channel records absolute positions with a word length of 32 bits, while single-turn data on the STG path is encoded at 20 bits. These separate feedback paths provide precise cycle-to-cycle positioning over extended travel distances. Additional resolver information is processed at 12-bit resolution, and the complete assembly weighs 6.0 kg, allowing installation on suitable DIN rails or panel plates.
