Product Description:

The MPS20 is a DC power supply unit produced by Okuma and positioned within the MPS Power Supplies series. It converts three-phase AC line power into a regulated DC bus while also providing low-level control voltage, so CNC drives and spindle amplifiers receive stable energy during machining operations. By combining main bus regulation with auxiliary control power, the unit simplifies cabinet wiring and supports coordinated regeneration back to the grid in automated production cells.

This model draws energy from a 3-phase mains source and disconnects automatically if the line rises above 253 Vrms, protecting downstream equipment from overvoltage. Internally, it develops a DC link of 300 VDC that feeds servo inverters, and it sustains that bus with a rated throughput of 20 kW. A separate control section supplies logic circuits with 24 VDC, isolating sensitive electronics from the high-energy bus. The 7-segment LED on the front panel shows fault codes and operating status for quick local diagnosis without external tools. Power returned from decelerating axes is handled by a regeneration method that routes excess energy back to the supply network instead of absorbing it in braking resistors, reducing cabinet heat and energy waste.

Mechanical integration is aided by a compact 150 mm width, a depth of 325 mm, and a height of 380 mm, allowing the unit to fit in crowded control enclosures. Despite a continuous output equivalent to 27 hp, the assembly weighs only 11.8 kg, so it can be mounted on standard DIN rails or shelf brackets without imposing excessive panel load. Wiring lands on an M4 terminal block that accepts ring or fork lugs for secure torque connections, and the power-regeneration design minimizes thermal loading, helping the enclosure maintain rated temperatures with normal panel ventilation.