Product Description:

The DMA 030A 4101-D is a servo drive module manufactured by Bosch Rexroth Indramat as part of the DMA Servo Drive Modules series. It is a three-phase power unit for synchronous and asynchronous motors that supplies regulated armature currents and also provides one-axis positioning, allowing an individual machine axis to be moved and held without an external controller. In automated production cells, this module forms the link between the DC bus supplied by the backplane and the motor windings, giving motion control functions needed for conveyors, pick-and-place stations, and packaging equipment.

The control electronics draw 1.23 A from the separate 24 V supply, while the main inverter uses a DC link of 670 VDC regulated / 715 VDC non-regulated to create a sinusoidal output. At a 4 kHz switching frequency, the continuous phase current is 28 Arms and the short-term limit is 35 Arms; at 8 kHz, these values fall to 23 Arms and 32 Arms respectively. Power lost as heat never exceeds 180 W, a figure that guides cabinet ventilation sizing. The drive mates with an RMA/DM 30 backplane module, and its setpoint channel accepts differential analog references with 16-bit resolution for precise torque or velocity commands.

Thermal management is handled by backplane air cooling; a single fan pulls air across the heat sink, and a minimum clearance of 100 mm above and below the unit helps prevent recirculation. Installation depth is 288 mm and overall height is 504 mm, dimensions that fit standard 600 mm control enclosures. The housing weighs 7.3 kg, which keeps handling manageable during installation. As a three-phase module for synchronous and asynchronous motors, it supports velocity loops through its analog command channel, while the additional one-axis positioning function simplifies systems that need point-to-point moves without a PLC.