Product Description:

The DMA 140D 1201-D is a modular servo drive manufactured by Bosch Rexroth Indramat and delivered as part of the DMA Servo Drive Modules series. It is a three-phase power stage built for synchronous and asynchronous motors and is intended to regulate torque, speed, and position in automated production equipment. The device exchanges motion commands and status data with higher-level controllers through a SERCOS fiber-optic setpoint interface, aligning it with distributed control architectures used on modern assembly lines and machine tools.

Electrical limits include several current and voltage ratings. In backplane air-cooled service, thermal losses remain at 700 W, helping keep cabinet temperatures within the intended operating range. The module can supply 141 Arms in open-loop operation at a 4 kHz switching frequency, or 117 Arms when the PWM carrier is raised to 8 kHz, and both values support rapid acceleration of heavy axes. Closed-loop regulation reduces that current to 87 Arms for continuous motion control. Energy is drawn from a non-regulated DC link of 715 VDC, so braking energy must be managed externally. A standard encoder interface supports rotor feedback, and no additional functional options are installed.

Mechanical integration follows a backplane design: the housing spans 200 mm in width, weighs 19.3 kg, and plugs directly into a common DC bus rail. During normal operation, the regulated link stabilizes at 670 VDC, reducing ripple that could disturb precision positioning, and the current limit in this mode falls to 60 Arms to protect motor windings. The auxiliary 24 V logic supply draws 1.58 A, enabling control electronics and cooling fans before the main bus is energized. Air pulled through the rear channels provides the required cooling flow during normal operation.