Product Description:

The DM 4K 8001-D is a servo drive module produced by Bosch Rexroth Indramat for the DM Servo Drives series. In an industrial automation cell, this module converts a high-energy DC bus into phase-controlled outputs that run synchronous or induction motors, allowing positioning, speed regulation, and load sharing across coordinated axes. By integrating with a higher-level motion controller, it provides the amplification and motor protection functions required for continuous machine duty.

Electrically, the drive draws its energy from a regulated DC link set at 670 VDC and attaches to the common bus through internal busbars. Under rated load, the phase output is 2.5 Arms, while temporary demand can reach 6.6 Arms during acceleration. The power devices switch at 8 kHz, balancing current ripple and thermal stress, and total internal power loss is 96.5 W. Above 45 °C, the current capability derates by 0.10 A/K, which helps protect the semiconductors. Control is open loop with a U/f characteristic, so torque is modulated through the ratio of voltage to frequency rather than encoder feedback. The reference signal is accepted through an analog 10-bit setpoint channel, and no encoder interface is included.

The housing is 430 mm tall, only 50 mm wide, and weighs 6.0 kg, so multiple modules can mount densely inside a cabinet. The auxiliary logic rail requires 0.89 A at 24 V, which can be supplied from the common control power distributor. No option module slot is provided, so expansion for fieldbus or safety functions must be handled externally. Because the unit has no encoder interface, it is typically paired with motors that accept scalar control or that report position through a separate feedback chain. The narrow profile aids thermal conduction and shortens cable runs between the DC bus and motor terminals.