Product Description:

The DMA 140D 1301-D is a servo drive module from Bosch Rexroth Indramat in the DMA Servo Drive Modules series. It operates as a 3-phase power stage for synchronous and asynchronous motors, mounted on a shared DC bus. Within automated lines, the module converts bus energy into controlled currents so that speed and torque references from the motion controller reach the motor windings accurately.

At a 4 kHz switching frequency the drive can deliver a continuous current of 87 Arms and withstand an overload peak of 141 Arms; when the pulse frequency is raised to 8 kHz the continuous limit falls to 60 Arms while the short-term ceiling becomes 117 Arms. These four limits define the thermal envelope that engineers must observe when pairing the module with machine axes. Control electronics are supported by a 24 V auxiliary supply that draws 1.58 A, and heat is removed by air flowing across the backplane, eliminating the need for fans on the front panel. Position feedback arrives through a standard encoder interface whose incremental input channel accepts signals up to 1 MHz, while dedicated processing stages handle sine encoders to 50 kHz and sine/cosine formats to 800 kHz. The bandwidth supports high-resolution loops on slow indexing tables and fast spindles.

The common DC bus feeding the module is maintained between 715 VDC unregulated and 670 VDC regulated, ensuring stable energy for dynamic braking and rapid accelerations. The housing carries a protection rating of IP20, indicating finger-safe internal parts yet requiring installation inside a cabinet qualified for the 3K3 climatic category. Resolver feedback is converted with a resolution of 12 bits, supporting coarse-absolute position capture during homing sequences. Mechanically, the unit tolerates assembly and transport shocks up to 15 g without performance loss. Together, these electrical, environmental, and mechanical limits give integrators clear boundaries when integrating the DMA module into multi-axis packaging, printing, or material-handling equipment.