Product Description:

The DM 4K 5311-D servo drive is produced by Bosch Rexroth Indramat within the DM Servo Drives series. It functions as a closed-loop power module that links a motion controller to a three-phase motor, regulating current and voltage so that industrial axes follow commanded velocity and torque profiles. By converting DC bus energy into modulated phase voltages, the unit supports precise positioning, speed control, and coordinated movement in automated assembly lines, packaging machinery, and material-handling systems.

The inverter section provides an output of three-phase 400 V, derived from an internal DC bus that is maintained at up to 715 VDC when unregulated and trimmed to 670 VDC when active regulation is engaged. Thermal design limits continuous dissipation to 96.5 W, a value used when sizing enclosure airflow and cabinet heat exchangers. Pulse-width modulation is generated at a switching frequency of 8 kHz, balancing current ripple against transistor losses. Sine/cosine feedback is interpolated to 4096 increments per electrical period, and resolver signals are digitized with 12-bit resolution; these conversion depths shape current-loop bandwidth and position granularity. Multi-turn position is retained with 32-bit depth, while single-turn data is stored with 20-bit accuracy, enabling the drive to report absolute shaft angle without homing routines.

High-speed feedback channels tolerate incremental encoder streams up to 1 MHz, while the sine/cosine port accepts carrier frequencies to 800 kHz; both limits protect input comparators from aliasing during rapid spindle operation. When lower-frequency analog encoders are used, the dedicated sine track ceiling of 50 kHz governs signal integrity. A standby control supply of 0.89 A at 24 V keeps logic active for fieldbus communication and safe-torque-off circuits when the power stage is de-energized. These feedback limits allow the drive to process high-speed position data without losing count during rapid acceleration moves.