Product Description:

The MMC-SD-6.0-460-D is a standalone smart drive produced by Kollmorgen and belongs to the MMC Standalone Smart Drives series. As a self-contained servo drive, it rectifies incoming three-phase mains power, creates a regulated DC bus, and then synthesizes variable-frequency output for synchronous or induction motors used in conveyors, form-fill-seal systems, and other automated stations. Integrated motion functions allow the unit to coordinate speed, torque, and position without an external controller, so it serves as a compact control node in distributed industrial systems.

Under continuous load, the drive supplies 13.5 A of output current, a value that sets the thermal limit for long-term motor excitation. For short accelerations, it can surge to a peak of 27.0 A, giving machines extra torque during starts or rapid index moves. Line-side requirements include a nominal input power of 8.6 kVA, so branch circuits and protection devices must be sized accordingly. At power-up, the mains draw may reach 20.2 A RMS because of capacitor charging, so fuse and breaker sizing must account for that inrush. When the internal DC bus rises above the 780 VDC shunt threshold, an onboard transistor diverts excess energy to an external resistor to help prevent overvoltage trips during regenerative deceleration. A 470 µF bus capacitor bank smooths ripple to maintain stable output waveforms.

The power stage can deliver up to 6.0 kW when fed from 460 VAC lines and still provide 3.0 kW on 230 VAC supplies, so the same model can be used with multiple plant voltages. Internal losses are specified at 150 W, and this heat load affects enclosure ventilation and ambient derating. The control electronics operate from 24 VDC, drawing 1.05 A in steady operation and experiencing a 4 A inrush, while a separate brake output can source 0.5 A for motor-mounted holding brakes. Energy returned to the bus is absorbed up to 44 J, which helps reduce stress on the external resistor during frequent stops. The drive weighs 16 lb, which is relevant for panel support and vibration isolation hardware.