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3. Installation
3.3 Installation
13
(2) Shield clamping of cables
The shield of the shield cable connected to the base I/O unit, servo drive unit and spindle drive unit
must be connected to the grounding plate to stabilize operation while preventing malfunctioning due to
noise.
The shield can be connected to the grounding plate with lead wires or clamp fittings. Refer to the
following drawings to treat the shield cable.
Example of lead wire treatment
Grounding
cable
Unit
Cable
Unit
When soldering the grounding cable to the shield, if the soldered
section is close to the shield, the signal wire's sheath could melt
by the soldering heat resulting in a short-circuit.
Solder at a place 10 to 20mm away from the mesh section.
Caution
Cable
Shield
Soldering
Signal wire
Grounding cable
Shield
Clamp fitting
Cable
Cable
Grounding plate
Unit
Shield
Less than 0.8m
Clamp
fitting
Grounding
plate
When manufacturing the clamp fittings and grounding plate, refer to "Appendix 1.10 Grounding Plate
and Clamp Fitting Outline Drawings". These can also be ordered from Mitsubishi.
Execute ground treatment by cable clamps, etc., for the shielded cable indicated in this
instruction manual.
Example of connection with clamp fitting
(1) Peel part of the cable sheath and expose
the shield as shown in the drawing.
Press the exposed part against the grounding
plate with the cable clamp fittings.
(2) If the cable is thin, clamp several together
in a bunch.
(3) Use adequate force when tightening the cable
so that the wire material is not damaged.
(4) Connect each grounding plate together and
ground them at one point.
CAUTION
Example of connection with lead wire