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Power Supply OKUMA
Brand: OKUMA -
Cat: Power Supply
Code:MPR5
| Combination name | Availability | Price |
|---|---|---|
CNC Power Supply – OKUMA MPR5
The MPR5 is a switching power supply unit for CNC control systems (“CNC Power Supply Unit”) manufactured by OKUMA, designed to power the electronic circuits of CNC control systems in the OSP (Open System Platform) series. The module delivers multiple regulated voltages required by control boards, I/O interfaces and logic circuits of the CNC unit. The commercial reference is MPR5; in some systems the module is integrated into the control rack or mounted on a dedicated panel. Compatible with OKUMA lathes, machining centres and grinding machines from the 1980s–2000s.
The power supply is the critical component that converts and distributes electrical energy to all circuits of the CNC control: an unstable voltage or an out-of-specification output causes malfunctions, safety shutdowns or irreversible damage to logic boards. Its failure renders the machine completely inoperable, halting production until the module is replaced or repaired.
OKUMA Corporation, founded in 1898 in Oguchi (Aichi, Japan), is one of the world’s leading CNC machine tool manufacturers. Unlike many competitors, OKUMA develops its entire control chain in-house — CNC controls, motors, drives and power supplies — ensuring optimal integration and advanced diagnostics. Components in the MPR series belong to an earlier generation of CNC systems: these are legacy / discontinued products, available exclusively as used, surplus or through specialist repair services.
Main Technical Specifications
| Type | Switching power supply for CNC control (CNC Power Supply Unit) |
| Part number | MPR5 |
| Brand | OKUMA Corporation |
| Known application | OKUMA CNC systems, OSP series (lathes, machining centres, grinding machines – 1980s–2000s) |
| Function | Regulated power supply for logic circuits, I/O boards and CNC control unit |
| Conversion type | Switching (SMPS – Switched Mode Power Supply) |
| Input voltage | 100–240 V AC single-phase, 50/60 Hz (typical) |
| Output voltages | +5 V, ±12 V, +24 V DC (typical; verify against machine documentation) |
| Interfaces / connectors | Multiple edge connectors to CNC rack; mains input terminal strip |
| Protections | Overcurrent, short circuit, over-temperature (typical industrial SMPS) |
| Weight | ~0.8–2.0 kg |
| Dimensions | ~150–300 mm |
| Production status | Legacy / discontinued — used/surplus/repair only |
