Mitsubishi M80 Spindle Drive MDS-EJ-SP-100

MDS-EJ-SP-100 is a Mitsubishi Electric all-in-one spindle drive unit from the MDS-EJ/EJH series, designed for CNC machine tools and industrial automation systems.

Description

• Manufacturer: Mitsubishi Electric
• Series: MDS-EJ / EJH Series
• Model: MDS-EJ-SP-100
• Type: 1-axis spindle drive unit with built-in converter
• Application: CNC lathes, machining centers, milling machines, turning centers

Main Function

This unit is a spindle amplifier that:

• Receives spindle speed commands from the CNC controller
• Controls spindle motor speed and torque
• Provides smooth acceleration/deceleration
• Supports regenerative braking
• Uses compact integrated drive architecture

Key Specifications

• Nominal maximum current (peak): 100 A
• Power input: 3-phase 200–240 VAC
• Rated input current: Approx. 16.0 A
• Control power input: Single-phase 200–240 VAC
• Frequency: 50/60 Hz
• Control method: Sine-wave PWM control
• Regeneration method: Power regeneration method
• Protection class: IP20
• Cooling: Forced air cooling
• Weight: Approx. 4.0 kg

Main Connections / Terminals

Typical terminals and connectors include:

• L1, L2, L3 → 3-phase AC input
• U, V, W → spindle motor output
• L11, L21 → control power input
• P+, C, D → regenerative resistor terminals
• CN1A / CN1B → optical communication
• CN2 / CN3 → encoder connections
• PE → grounding terminal

CNC System Role

CNC controller → MDS-EJ-SP-100 → Spindle motor → Machine spindle rotation

Important Clarification

• SP models = spindle motor drives
• V1 models = servo axis drives
• CV models = power supply / converter units
• DH-AL models = AC input reactors