Product Description:

The DMA 45A 7301-D servo drive module is produced by Bosch Rexroth Indramat for the DMA Servo Drive Modules series. It serves as a three-phase power stage that supplies regulated current to synchronous and asynchronous motors used in automated production cells, material-handling axes, and similar motion tasks. Mounted on a shared rack backplane, the module works with external controllers to translate velocity and torque commands into precise motor excitation. This arrangement places the drive between the DC link supply and the motor so commanded motion can be converted into controlled electrical output.

This module dissipates its switching losses through backplane air cooling, so cabinet airflow along the mounting rail removes heat without additional fans on the front panel. With a physical width of 50 mm, multiple axes can be installed side by side while maintaining standard rack spacing. Position feedback from the motor is processed through a Resolver interface, allowing stable angular feedback even during low-speed operation. Communication to the higher-level controller is handled over CANrho, which carries setpoints, status data, and diagnostics on a single twisted pair. The unit is a 3-phase module for synchronous and asynchronous motors, so the same drive type can be used with both permanent-magnet and induction machines.

The module belongs to the Servodyn-D series, confirming compatibility with matching power supplies and option cards that use the same bus structure. It uses the Standard Variant configuration, which indicates the baseline feature set for this drive type. The module does not include integrated braking choppers, safety relays, or I/O expanders, so those functions must be provided externally when required. It also has a fixed interface configuration, which means alternative networks such as SERCOS or PROFIBUS cannot be retrofitted to this drive module.