Product Description:

The 1070080959-207 is a servo drive module built by Bosch Rexroth Indramat for the DMA Servo Drive Modules series. It operates as the power and control stage between a motion controller and a synchronous or induction motor, supplying regulated three-phase voltage while monitoring feedback devices. Within an automation rack, it docks to an RMA backplane and relies on forced air from an integrated fan for continuous thermal management. This arrangement allows the module to serve compact multi-axis systems that need coordinated motor control, shared power distribution, and consistent signal handling. It also separates high-power conversion from command electronics so rack-based control hardware can focus on motion logic while the module manages motor output.

The module draws its high-energy rail from a DC link rated at 670 VDC / 715 VDC, giving the power section the headroom needed for rapid torque changes. When the pulse-width-modulated carrier is set to 4 kHz in open-loop mode, the unit can deliver up to 35 A RMS; switching to 8 kHz lowers the ceiling to 32 A RMS because of additional switching losses. Closed-loop operation trims the continuous limits to 18 A RMS at 4 kHz and 12 A RMS at 8 kHz, values that set inverter sizing for sustained duty. Heat produced by switching and current flow is removed by a single air-cooling fan, and the remaining thermal margin follows a derating slope of 0.46 A per kelvin between 45 °C and 55 °C. This behavior helps the drive maintain stable output while balancing current capability against switching frequency and ambient temperature.

Low-voltage electronics are supplied from the control bus at 1.23 A, allowing the interface board to process 24 V control signals and monitor encoders such as STG, MTG, or gear sensors. Rack integration is through the RMA/DM 30 backplane, which distributes logic power and fieldbus traffic across the assembly. Overall conversion losses peak at 180 W, so cabinet airflow must carry away the resulting heat during continuous operation. The mechanical footprint is limited to a 50 mm front width, enabling high-density stacking alongside other DMA modules. Position feedback reaches 32-bit resolution over 4096 revolutions for multiturn use, while single-turn channels operate at 20 bits, allowing accurate tracking of both repeated indexing moves and longer rotary travel. That combination supports applications that need precise shaft reference information without adding separate external feedback hardware in the rack.