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    Discontinued / Obsolete by OEM
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QD75M4

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Mitsubishi Electric QD75M4 is a four-axis MELSEC-Q positioning module that coordinates SSCNET-connected servo axes with linear and circular interpolation.
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Technical specifications for QD75M4

  • Manufacturer:
    Mitsubishi
  • Part Number:
    QD75M4
  • Product Family:
    Mitsubishi MELSEC
  • Product Type:
    MELSEC-Q Four-Axis Positioning Module
  • Stock:
    1
  • Controlled Axes:
    4
  • Positioning Records:
    600 per axis
  • Linear Interpolation:
    2, 3, or 4 axes
  • Circular Interpolation:
    2 axes
  • Positioning Units:
    mm, inch, degree, or pulse
  • Servo Network:
    SSCNET
  • Manual Pulse Inputs:
    A-phase and B-phase
  • External Command Inputs:
    Change, stop, near-point, upper and lower limits
  • Internal Current Consumption:
    0.4 A
  • Connector Wire Range:
    22 to 30 AWG, connector dependent
  • Connector Tightening Torque:
    0.20 to 0.29 N·m
  • Operating Temperature:
    0 to 55 °C
  • Weight:
    0.331 lbs (0.15 kg)
  • Tariff Code:
    8538901100
  • Country of origin:
    Japan
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Axis Control SSCNET Field Signals Setup

Features:

  • Four controlled axes support independent moves and coordinated interpolation.
  • Each axis stores as many as 600 positioning records with selectable engineering units.
  • SSCNET communication works with separate external limit, stop, changeover, and pulse-signal connections.
QD75M4 divides the front connector into four machine-signal groups that correspond to the controlled axes.

Positioning records on QD75M4 combine target, speed, acceleration, and path information for execution.

The MELSEC-Q backplane and SSCNET link give QD75M4 separate controller and servo communication paths.

The Mitsubishi Electric QD75M4 MELSEC-Q Four-Axis Positioning Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Mitsubishi Electric QD75M4 MELSEC-Q Four-Axis Positioning Module Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

Four-Axis Motion Organization

  • Independent moves: Each axis can execute its own positioning record.
  • Linear paths: Two, three, or four axes can share one linear interpolation command.
  • Circular paths: Two selected axes form a circular interpolation pair.
  • Units: Each configured axis uses the selected linear, angular, or pulse unit.

Servo Communication Path

  • Network role: SSCNET transfers positioning commands and servo feedback.
  • Axis mapping: Each connected amplifier is assigned to the corresponding module axis.
  • Startup match: Module parameters and servo-system settings must describe the same axis order.
  • Fault boundary: Network and amplifier diagnostics distinguish a servo-path fault from an external input state.

External Machine-Signal Chain

  • Limits: Upper and lower limit inputs define the permitted travel boundary.
  • Near point: The DOG signal identifies the approach region used by the positioning sequence.
  • Stop and change: STOP and CHG inputs apply their configured external-command functions.
  • Manual pulse: A- and B-phase inputs accept the supported manual pulse generator signals.

Record and Connector Preparation

  • Position data: Target, speed, acceleration, and path method are set in each record.
  • Connector choice: A6CON connector variants determine the permitted wire size and termination.
  • Axis labels: The two front connector groups separate axes 1/2 from axes 3/4.
  • Temperature: The installed module remains within the documented 0 to 55 °C operating range.
Description
Mitsubishi Electric QD75M4 is a MELSEC-Q four-axis positioning module that coordinates motion commands between the Q-series controller and SSCNET-connected servo amplifiers. It stores positioning data for each axis and converts controller requests into coordinated axis operations.

Four controlled axes on QD75M4 can run independently or participate in two-, three-, or four-axis linear interpolation, while paired axes support circular interpolation. This organization lets one positioning record define a coordinated path instead of treating every servo command as an unrelated move.

The SSCNET path of QD75M4 carries command and feedback exchange between the module and the servo system, leaving the external-device connector for limit, stop, near-point, changeover, and manual-pulse signals. Each axis therefore combines a networked servo path with dedicated machine-side control inputs.

Up to 600 positioning records per axis are stored by QD75M4, and the configured unit can be millimetres, inches, degrees, or pulses. The selected unit, command address, speed, acceleration, and interpolation method must describe the same mechanical axis before the record is executed.

Mounted in a MELSEC-Q base, QD75M4 draws its internal current from the system supply and presents separate front connections for its four axis groups. The 0 to 55 °C operating boundary and connector wire requirements apply to the installed module and field wiring.
Alternative Names
QD75 M4 QD 75M4 Mitsubishi QD75M4 Mitsubishi Electric QD75M4 QD75M4 Positioning Module QD7SM4 QD75M-4 Q075M4
Technical notes
Mitsubishi Electric QD75M4 combines four-axis positioning data, multi-axis interpolation, SSCNET exchange, and dedicated external machine signals.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
Why does one QD75M4 axis refuse to start while the other axes run?
Check the QD75M4 axis enable, positioning record, start command, SSCNET assignment, servo ready state, limits, STOP input, and error code.
How should QD75M4 axis numbers be matched to the front connector?
Map QD75M4 axes 1 and 2 to the first connector group and axes 3 and 4 to the second group before wiring machine signals.
What causes a QD75M4 interpolation move to stop before the target?
Review the QD75M4 participating axes, units, path record, limit inputs, servo alarms, stop conditions, and common interpolation parameters.
Why does a manual pulse generator not move QD75M4?
Verify the QD75M4 pulse A/B wiring, commons, selected axis, mode, generator type, scaling, and the servo-ready condition.
How are QD75M4 positioning units prevented from producing the wrong travel?
Set the QD75M4 axis unit, electronic gear, travel conversion, target data, speed, and servo parameters for the same mechanical scale.
What should be checked when QD75M4 reports an SSCNET communication fault?
Inspect the QD75M4 network cable, connector seating, amplifier addresses, axis order, servo power, termination, and reported module diagnostics.