Product Description:

The 1070084674-109 is a servo drive produced by Bosch Rexroth Indramat for the DM Servo Drives series. As a drive controller, it supplies regulated three-phase power to matched Rexroth servomotors and exchanges motion commands with higher-level PLCs. Within an automation cell, the unit converts DC bus energy into controlled AC output, enabling position, speed, and torque loops that keep machine axes synchronized. It occupies a panel-mount slot in electrical cabinets and draws auxiliary logic power to maintain internal electronics when the main bus is idle.

At the heart of the drive is a DC link that operates at 670 VDC when regulated and 715 VDC when non-regulated, providing the energy reservoir for the inverter stage. The inverter produces a 400 V three-phase output that can be modulated across a wide frequency span to match synchronous or asynchronous motor requirements. Continuous closed-loop current capacity is 9.7 Arms, while open-loop excursions up to 22 Arms support rapid acceleration and braking. The inverter switches at a carrier frequency of 8 kHz, balancing current ripple against switching loss. Command and diagnostic traffic moves over the SERCOS fiber-optic interface, and only 1.03 A is drawn from the cabinet’s 24 V supply for control electronics. Feedback from incremental encoders is accepted up to 1 MHz, ensuring clean capture of high-speed position data.

The drive also processes additional feedback formats. It decodes resolver signals at 12-bit resolution, sine encoders to 50 kHz, and hybrid sine/cosine formats up to 800 kHz. For absolute position tasks, it records a single-turn span of 20 bits and a multi-turn depth of 32 bits, aiding zero-reference recovery after power cycling. Thermal design limits conduction and switching dissipation to 156 W, allowing cabinet ventilation to remain modest. Across its full modulation range of 0 to 800 Hz, the unit maintains phase accuracy, so gearbox, STG, or MTG feedback chains stay aligned during extended dynamic duty.