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Appendix 4 - 6
Appendix 4 EMC Installation Guidelines
MITSUBISHI CNC
Appendix 4-5-3 Servo/spindle motor power cable
Power cable for servo motor
Power cable for spindle motor
[1] Use four wires (3-phase + earthing) for the power cable that are completely shielded and free from
breaks.
[2] Earth the shield on both the control panel side and motor chassis side.
[3] Earth the shield with a metal P clip or U clip.
(A cable clamp fitting can be used depending on the wire size.)
[4] Directly earth the shield. Do not solder the braided shield onto a wire and earth the end of the wire.
[5] When not using a shield cable for the power cable, use a conventional cabtyre cable. Use a metal
conduit outside the cable.
[6] Earth the power cable on the control panel side at the contact surface of the conduit connector and
control panel. (Mask the side wall of the control panel with paint.)
[7] Follow the treatment shown in the example for the conduit connector to earth the power cable on the
motor side. (Example: Use a clamp fitting, etc.)
Control panel
To drive unit
Earth with P or U clip
Cannon
connector
Shield cable
Servomotor
To drive unit
Cannon
connector
Control panel
Earth with paint mask
Conduit connector
Servomotor
Cabtyre cable
Conduit
Using shield cable
Using conduit
Control panel
Control panel
To drive unit
Earth with P or U clip
Shield cable
Terminal box
Spindle motor
To drive unit
Cabtyre cable
Conduit
Earth with paint mask
Conduit connector
Terminal box
Using shield cable
Using conduit
Solder
Conduit connector
Cannon connector
To earthing
Clamp fitting
Conduit