Power Supply

Switching Power Supply CNC – Mitsubishi QX084

The QX084 is a panel-mount switching power supply unit (“Switching Power Supply Unit”) manufactured by Mitsubishi Electric, designed for CNC and industrial automation control systems of the MELDAS and related series. The module converts the mains AC input voltage into regulated DC voltages required by the machine tool control circuits (CPU boards, I/O boards, axis modules). It provides the stabilised supply rails demanded by the control rack; revisions or code variants may differ in connector layout or input voltage range.

The power supply is the foundational component of the entire CNC system: without it no processing board, no drive and no I/O module receives its operating voltage. A power supply failure causes an immediate and total machine stop; the quality of the generated voltages directly affects the reliability and lifespan of all other electronic circuits in the control unit.

Mitsubishi Electric is one of the world’s leading manufacturers of CNC systems (MELDAS, M70, M80 series), programmable logic controllers (MELSEC), and servo drives (MELSERVO). Founded in 1921 as a division of the Mitsubishi group, it has developed a comprehensive range of industrial automation products. Legacy models such as the QX084 are discontinued: available only as used parts, NOS (New Old Stock), or through specialist reconditioning.

Main Technical Specifications

Servo Drive Converter Power Supply – MITSUBISHI MDS-D2-CV-370

The MDS-D2-CV-370 is a regenerative servo drive converter unit (“Servo Drive Converter Unit”) manufactured by Mitsubishi Electric, part of the MDS-D2 series of servo drives for CNC machine tools. The module converts three-phase AC mains into a DC bus to power servo drive modules of the same family (MDS-D2-SP, MDS-D2-V1, MDS-D2-V2), and is documented as a component of Mitsubishi CNC systems series M700, M70 and M800. The suffix “370” denotes a rated power of approximately 37 kW; the unit incorporates regenerative braking circuitry that returns deceleration energy to the AC mains supply, communicating with the CNC via SSCNET III/H interface.

The converter/power supply is the core of the CNC axis energy distribution system: it provides a stabilised DC bus to all connected servo drive modules and manages the regenerative energy produced during rapid axis decelerations, preventing DC bus overvoltage and thermal overload conditions. A failure in this module causes an immediate stop of all controlled axes and the spindle, rendering the machine completely inoperable until the unit is replaced or repaired.

Mitsubishi Electric is one of the world’s leading manufacturers of CNC systems and servo drives for machine tools, headquartered in Tokyo (Japan) and operating globally through its Mitsubishi Electric FA division. The MDS-D2 series has been superseded by the MDS-EJ/EX series; products in this family are now legacy / discontinued and available primarily as used, surplus, or through specialist repair services.

Main Technical Specifications

CNC Power Supply Unit – MITSUBISHI SF-PWH

The SF-PWH (internal part number SFPWH) is a switching power supply module for CNC control systems (“CNC Power Supply Unit”) manufactured by Mitsubishi Electric. The unit belongs to the family of power supply modules designed for the control boards of MELDAS-series and related Mitsubishi numerical control systems. It delivers the regulated DC voltages required by the control logic, axis modules, and operator panel interfaces; the PWH suffix identifies the specific power rating and mechanical form factor variant. Verify the installed hardware revision before replacement, as connector configurations may differ between variants.

The power supply unit is the energy core of the CNC rack: it converts mains voltage (or DC bus) into multiple stabilised outputs that are essential for the operation of the CPU, I/O boards, axis drives, and display. Even a partial failure on a single output rail can trigger unpredictable system faults, undiagnosable errors, or secondary damage to downstream boards; its condition directly determines the overall availability of the machine tool.

Mitsubishi Electric is one of the world’s leading manufacturers of industrial automation systems, motion control, and numerical controllers. The FA (Factory Automation) division has produced the MELDAS, MELDASMAGIC, and more recent M70/M80 CNC series for decades. Components in the SF-PWH series belong to earlier generations of CNC controls and are to be considered legacy / discontinued: availability is limited to the used, surplus, and specialist repair channels.

Main Technical Specifications

CNC Power Supply Unit – MITSUBISHI SF-PW30

The SF-PW30 is a switching power supply module (“Power Supply Unit”) manufactured by Mitsubishi Electric, belonging to the SF series of CNC system components and servo drive accessories. The internal part number is SFPW30. The unit provides the stabilised DC supply voltages required by logic boards and control modules within the CNC rack, interfacing with the main system or drive chassis. It is documented on MELDAS CNC systems and SF-series Mitsubishi Electric drives; the suffix “30” presumably denotes the nominal power rating in watts or a size variant.

The power supply is the energy backbone of the CNC system: it converts and regulates mains voltage into precise DC rails (+5 V, ±15 V, +24 V) that power the CPU, axis control boards and logic circuits throughout the controller. A power supply failure causes the immediate shutdown of the entire machine: without stable supply voltages no CNC module can operate correctly, making this component critical for production continuity and system safety.

Mitsubishi Electric is one of the world’s leading manufacturers of CNC systems, servo drives and industrial automation equipment, with over a century of history in electrical and electronic engineering. The FA (Factory Automation) division produces the MELDAS and MELSERVO systems, widely deployed across global manufacturing. SF-series products in their older versions are considered legacy / discontinued: availability must be verified through specialist CNC spare-parts distributors.

Main Technical Specifications

CNC Power Supply Module – MITSUBISHI SE-PW

The SE-PW is an electronic power supply module for CNC control units (“CNC Power Supply Module”) manufactured by Mitsubishi Electric, documented as a component of Mitsubishi MELDAS series CNC systems. The module converts mains voltage into regulated, filtered DC voltages distributed to the CNC control boards (digital logic, analogue interfaces, I/O). It is not a regulation board or servo drive, but a dedicated power supply unit serving the entire control electronics of the machine.

The CNC power supply module is the component that converts and distributes electrical power to all circuits of the numerical control unit: without stable, filtered output voltages the CNC cannot start up or operate. A power supply failure causes an immediate and total machine shutdown; out-of-tolerance output voltages can also damage connected boards, making replacement an urgent, high-priority intervention above any other electronic fault.

Mitsubishi Electric is one of Japan’s leading industrial automation manufacturers, active in the CNC sector with the MELDAS line since 1970. The FA (Factory Automation) division produces numerical controls, servo motors and drives used worldwide in the metalworking industry. Components of the SE series are to be considered legacy / discontinued: sourced primarily as used, surplus or through specialist repair services.

Main Technical Specifications

CNC Power Supply Unit – MITSUBISHI SF-PW

The SF-PW is a CNC power supply unit (“CNC Power Supply Unit”) manufactured by Mitsubishi Electric, designed to provide regulated DC supply voltages to the internal boards of MELDAS-series and related CNC numerical control systems. The unit converts mains AC voltage into multiple regulated DC outputs (+5 V, ±12 V, ±15 V, +24 V typically) required by control logic, interfaces and axis boards. The commercial part number is SF-PW (internal article code: SFPW).

The power supply is the energy core of the CNC system: without stable, well-regulated voltages the entire control unit cannot operate. A failure typically manifests as inability to power on, voltage-out-of-range alarms, spontaneous resets, or secondary damage to downstream boards. Replacement or repair of this unit is often the first diagnostic step in the event of complete machine downtime.

Mitsubishi Electric is one of the world’s leading manufacturers of CNC systems, servo and spindle drives, and industrial automation. The FA (Factory Automation) division produces numerical controllers from the MELDAS series up to the modern M800/M80 platforms. Products from legacy series such as MELDAS are to be considered legacy / discontinued as new parts: available primarily as used, surplus or through specialist repair.

Main Technical Specifications

CNC Power Supply Unit – MITSUBISHI QX086

The QX086 is a switching power supply module (“Power Supply Unit”) manufactured by Mitsubishi Electric, a component of CNC systems in the MELDAS or M-series family. It provides the regulated DC voltages required by the logic, control and communication boards of the CNC system. The part number QX086 uniquely identifies the module within the Mitsubishi Electric catalogue; it is compatible with CNC control cabinets using the proprietary Mitsubishi power bus standard. Compatibility with the specific machine should be verified before installation.

The power supply unit converts mains voltage into regulated DC voltages essential for the operation of all electronic boards in the CNC system. A failure in the power supply causes the immediate shutdown of the entire control unit: the machine is unable to execute any programme or move any axis. Unstable or missing supply voltages can also damage downstream logic boards through transient over- or under-voltage conditions, making this component absolutely critical for production continuity and for protecting the other modules in the system.

Mitsubishi Electric is one of the main divisions of the Japanese industrial group Mitsubishi, active in industrial automation, CNC numerical controls (MELDAS line and M-series, M70, M700, M800) and servo drive technology. CNC products from the MELDAS series of the 1980s–1990s and early M-series versions are now legacy / discontinued: availability is limited to used parts, NOS (new old stock) and specialist repair.

Main Technical Specifications

CNC Power Supply Unit – MITSUBISHI PD23A

The PD23A is a CNC power supply unit (“CNC Power Supply Unit”) manufactured by Mitsubishi Electric, documented as a component of the MELDAS series CNC controllers. The module converts the mains supply into multiple regulated DC outputs distributed to the logic boards, interface modules and servo drives of the CNC system. It is not a power drive module for axes or spindle, but the primary power source for the control electronics.

The CNC power supply is the component that delivers regulated power to all boards and modules in the control system: without it the CNC cannot start up or perform any function. A power supply failure results in complete loss of the operator panel, no communication with the axes and an immediate machine stop; it is therefore one of the most critical components for production continuity.

Mitsubishi Electric is one of the world’s leading manufacturers of CNC systems, servo drives and industrial automation, with a long-standing presence in the machine tool sector since the 1970s. The Mitsubishi CNC division produces the MELDAS, M70, M700 and M800 controller series. Components from older series such as the PD23A are legacy / discontinued and available only as used stock, NOS surplus, or through specialist repair.

Main Technical Specifications

CNC Power Supply Unit – MITSUBISHI PD21B

The PD21B is a power supply module (“Power Supply Unit”) manufactured by Mitsubishi Electric, used in CNC control units of the MELDAS series. The module receives AC mains voltage and converts it into regulated and filtered DC voltages required to power the control boards, processors, and interface modules of the CNC system. It is not a drive or CPU board: it is a dedicated power conversion module for the entire control electronics.

The power supply is the fundamental element of the CNC electrical system: it provides the regulated voltages (typically +5 V, ±15 V, +24 V DC) essential for the operation of all control boards, axis modules, and I/O interfaces. A failure of this module causes an immediate shutdown of the entire CNC unit, rendering the machine completely inoperative until the component is replaced or repaired.

Mitsubishi Electric is one of the leading Japanese manufacturers of industrial electronics, CNC systems, inverters, servo systems, and factory automation. The CNC division — historically known under the MELDAS brand — has been producing controllers for machine tools since the 1970s. Products in the PD series are legacy / discontinued: available exclusively as used, surplus, or through specialist repair services.

Main Technical Specifications

CNC Power Supply Unit – Mitsubishi PD14C-1

The PD14C-1 is a CNC control power supply module (“CNC Power Supply Unit”) manufactured by Mitsubishi Electric, belonging to the component family for the MELDAS series CNC control systems. The module generates and distributes the regulated DC voltages required by logic boards, I/O modules, and axis drive circuits within the CNC controller. The commercial alternate part number is PD14C-1 (internal item code: PD14C1). The unit is designed for rack or panel mounting inside the machine tool electrical cabinet.

The power supply is the component that converts the AC mains voltage into the regulated DC rails that all CNC electronic boards depend on. A failure — even partial, on a single output rail — can cause loss of safety logic, axis lockout, or a complete failure to boot, taking the machine entirely out of service. Output stability directly affects the accuracy of the analogue references sent to the drives and, consequently, the dimensional accuracy of machined parts.

Mitsubishi Electric is one of the world’s leading manufacturers of CNC systems, industrial inverters, and servo drives, with over 50 years of presence in motion control. The MELDAS division has equipped tens of thousands of machine tools worldwide; components from older series are legacy / discontinued and available only as used spare parts, NOS surplus, or through specialist repair services.

Main Technical Specifications

CNC Power Supply Unit – MITSUBISHI PD14-A

The PD14-A is a switching power supply for CNC systems (“CNC Power Supply Unit”) manufactured by Mitsubishi Electric, documented as the power supply module for MELDAS M5xx/M6xx series CNC controllers. It provides the regulated DC voltages required by the CNC rack logic circuits: CPU boards, I/O modules, and axis interfaces. Available under the designation PD14-A; some variants may differ in current rating or hardware revision.

The power supply is the energy backbone of the CNC system: it converts AC mains voltage into multiple regulated DC outputs that power the CPU board, I/O modules, servo drive interfaces, and auxiliary circuits. A power supply failure causes immediate and complete shutdown of the numerical control, rendering the machine inoperable; the quality and stability of its outputs directly affect the reliability of the entire system.

Mitsubishi Electric is a leading Japanese manufacturer of industrial automation systems, including the MELDAS CNC line (now evolved into the M800/M80 series). Products in the PD14 family are legacy / discontinued: no longer available as new, obtainable only as used, surplus, or through specialist repair services.

Main Technical Specifications

DC Bus Converter Unit – Mitsubishi MDS-C1-CV-260

The MDS-C1-CV-260 is a DC bus converter unit (“DC Bus Converter Unit”) from the MDS-C1 series, manufactured by Mitsubishi Electric. It is part of the MELSERVO MDS-C1 drive system, designed for Mitsubishi CNC controllers of the M640, M64 and compatible series, used on machining centres, lathes and CNC milling machines. The unit converts three-phase AC mains voltage into a stabilised DC bus voltage, which in turn powers the servo (SV) and spindle (SP) amplifier units connected in parallel on the same internal bus. The suffix 260 denotes the nominal capacity; other ratings are available within the MDS-C1-CV family.

The MDS-C1-CV-260 converter is the heart of the drive system power plant: without it, neither the servo axes nor the spindle can receive power, leaving the machine completely inoperable. In addition to supplying the DC bus to the connected amplifiers, the unit manages regenerative braking, returning to the mains the kinetic energy generated by the axes during deceleration and reducing overall energy consumption. A fault in the CV unit immediately triggers a DC bus alarm and a total loss of motion across all machine axes.

Mitsubishi Electric is one of the world’s leading manufacturers of CNC systems, drives and industrial automation, active in the machine tool sector with the MELDAS / MELDASMAGIC line and the MDS drives. The MDS-C1 series has been superseded by the MDS-D2 and MDS-EJ / EX families; all C1 series products are therefore legacy / discontinued and available exclusively as used, surplus or through specialist repair services.

Main Technical Specifications