Product Description:

The MMC-SD-4.0-460-D is a standalone smart drive manufactured by Kollmorgen within the MMC Standalone Smart Drives series. Designed for panel-mounted use with a 460 VAC supply, the unit modulates three-phase power to control brushless or induction motors using speed, torque, or position setpoints supplied by the machine controller. By integrating power electronics, motion control, and braking circuitry in one chassis, it simplifies installation in packaging lines, material-handling conveyors, and general automation cells.

With a 460 VAC supply, the drive draws a continuous line current of 7 A RMS, while a brief startup can produce an inrush current of 13.2 A RMS before the input rectifier settles. Internally, 470 µF of bus capacitance smooths the rectified voltage so the inverter can deliver a sustained motor phase current of 9.0 A (0-Peak). When fully loaded, the power stage provides a rated output of 4.0 kW and draws 5.6 kVA from the mains. These values assist with branch-circuit sizing and breaker selection. Heat from continuous operation is dissipated through a heat sink and forced-air path to keep semiconductor junction temperatures within their rated limits.

For short bursts of acceleration, the inverter can supply 18.0 A (0-Peak) to the motor windings. Regenerated energy is diverted to an internal resistor that can absorb 44 J per event without exceeding its thermal limit. Steady-state conversion losses amount to 102 W, which must be considered when calculating the enclosure cooling load. The integrated brake driver supplies 0.5 A to hold vertical axes when motion stops. The recommended transformer size for a 460 VAC supply is 8.5 kVA, providing sufficient capacity for peak demand without saturation. The drive weighs 16 lb, and its compact frame helps minimize the required cabinet depth.