Mitsubishi MDS-A-CV-220 Power Supply Unit for MDS Series Servo Drives

Product Overview

The Mitsubishi MDS-A-CV-220 is a power supply unit designed for the MDS series of servo drives and spindle drives used in CNC machine tools and industrial automation systems. This unit converts three-phase AC input power (200-230 V, 50/60 Hz) into a regulated DC voltage (typically 270-310 V DC) that is supplied to the common DC bus of connected MDS servo amplifiers. The MDS-A-CV-220 includes a built-in regenerative resistor and braking circuit to dissipate energy during motor deceleration. It is an essential component for multi-axis motion control systems requiring a shared power supply.

Key Features of MDS-A-CV-220

The unit has a power rating suitable for powering multiple MDS servo amplifiers (check specific rating per nameplate). It includes an internal filter for EMI reduction and overcurrent/overvoltage protection. The MDS-A-CV-220 has LED indicators for power and fault status. It is designed for forced-air cooling with an internal fan. The unit connects to the servo drives via a DC bus bar or cable. It includes terminals for external regenerative resistor if additional braking capacity is needed. The operating temperature range is 0 to 55°C. The unit is certified for CE and UL standards.

Technical Specifications

• Manufacturer: Mitsubishi Electric

• Part Number: MDS-A-CV-220

• Series: MDS-A

• Product Type: Power Supply Unit for Servo Drives

• Input Voltage: 200-230 V AC, 3-phase, 50/60 Hz

• Output Voltage (DC bus): 270-310 V DC (nominal)

• Rated Power: Refer to nameplate (typically several kW)

• Built-in Braking Resistor: Yes

• External Resistor Connection: Yes (optional)

• Protection: Overcurrent, overvoltage, overheat

• Indicators: Power, fault LEDs

• Cooling: Internal fan

• Operating Temperature: 0 to +55 °C

• Storage Temperature: -20 to +60 °C

• Degree of Protection: IP20

• Certifications: CE, UL

Functional Description

The MDS-A-CV-220 rectifies and filters the incoming AC power to produce a regulated DC bus voltage. This DC bus is shared by all connected MDS servo drive units, allowing regenerative energy from one axis to be used by another axis, improving energy efficiency. The built-in braking resistor dissipates excess regenerative energy when the DC bus voltage exceeds a threshold. The unit provides status signals to the controller for power good and fault conditions. The fan runs continuously when power is applied.

Applications

This power supply unit is used in Mitsubishi MDS-based servo systems for CNC machine tools, robotic systems, and high-precision positioning tables. It is a replacement part for failed power supplies in existing systems.