Product Description:

The 1070070774-611 is a servo drive module produced by Bosch Rexroth Indramat within the DMA Servo Drive Modules series. Installed on a backplane, the unit routes DC bus power to motor inverters and governs current loops for synchronous and asynchronous motors in automated machinery. By combining signal processing with high-voltage switching hardware, the module forms the core of an axis channel and translates control commands from the higher-level controller into precise torque and speed regulation.

Its internal DC link operates on two reference levels: an unregulated bus of 715 VDC that mirrors upstream rectifier output, and a regulated level of 670 VDC that is held by the braking chopper to protect connected devices. During closed-loop operation at a 4 kHz pulse-width modulation frequency, the module can deliver 23 Arms; when short-term overload is permitted, it can supply up to 51 Arms to provide additional acceleration torque to the motor. Communication to the motion controller occurs over the CANrho fieldbus, so status words, parameter data, and diagnostic codes are exchanged without separate wiring. For applications that favor lower switching losses, the 8 kHz carrier is available, with corresponding continuous and peak currents of 15 Arms and 44 Arms.

Thermal management is handled by an air-cooled backplane; once the ambient temperature exceeds 45 °C, the continuous output must be reduced by 0.65 A/K at 4 kHz or by 0.45 A/K at 8 kHz to keep the heat sink within permissible limits. The drive interprets encoder data with a multi-turn depth of 32 bits and a single-turn granularity of 20 bits, and an additional 12-bit resolver channel is available for legacy motors. The module measures 504 mm in height, 49 mm in width, and 288 mm in depth, which allows dense rack installation alongside other DMA modules.