Product Description:

The DM 8K 7301-D is a servo drive module built by Bosch Rexroth Indramat for the DM Servo Drives series. It conditions and supplies phase current to matched servo motors so that automated machinery, gantry pick-and-place systems, and other motion stations can achieve commanded position and speed profiles. Installed inside a control cabinet, the unit connects to a supervisory robot controller and translates high-level setpoints into precise motor currents required for closed-loop industrial automation. This arrangement allows the axis to respond quickly to changing loads during acceleration, deceleration, and steady-speed operation.

The control electronics draw 0.89 A from the 24 V auxiliary rail, a value that guides power-supply sizing for logic circuits. At an 8 kHz current loop, the power stage delivers a continuous 3.6 A rms, while short moves can reach 10 A rms before foldback limits engage. Available current declines with temperature at a rate of 0.10 A/K, so output capability drops as ambient heat rises. Conduction and switching losses add up to 96.5 W under full load, making airflow verification important because the drive depends on forced-air cooling through its finned housing. Cabinet layout therefore needs a clear path for intake and exhaust air so heat does not build up around adjacent modules. No additional braking or safety circuits are built in, so the surrounding system must provide those functions when they are required.

Motor position is read by a Resolver interface with a resolution of 12 bits, providing the granularity required for mid-range axis accuracy. Motion commands arrive via the CAN-based setpoint link labeled CANrho, matching the message structure used by the rho3 and rho4 robot controller family. Using separate feedback and command paths helps the controller maintain stable commutation and position tracking during coordinated motion. Cabinet space is conserved by the 50 mm module width and the compact mechanics designation, allowing tight stacking alongside other DM units. Despite its narrow profile, the enclosure weighs 6.0 kg, so the mounting structure must be able to support the combined load of multiple installed drives.