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7 EMC DIRECTIVES
7.1 Requirements for Compliance with the EMC Directive
Installation instructions for EMC directive
Motion controller is an open type device and must be installed inside a control panel for use.
This not only ensures safety but also ensures effective shielding of Motion controller-generated electromagnetic noise.
Control panel
• Use a conductive control panel.
• When attaching to the control panel's top plate or base plate by bolt, mask the grounding parts to ensure they are not
coated.
• To ensure good electrical contact with the control panel, mask the installation bolts of the inner plate in the control panel so
that contact between surfaces can be ensured over the widest possible area.
• Ground the control panel with a thick wire so that a low impedance connection can be ensured even at high frequencies.
• Holes made in the control panel must be 10cm (3.94inch) diameter or less. If the holes are larger than 10cm (3.94inch),
radio frequency noise may be emitted. In addition, because radio waves leak through a clearance between the control
panel door and the main unit, reduce the clearance as much as practicable. The leakage of radio waves can be suppressed
by the direct application of an EMI gasket on the paint surface.
Connection of power line and ground wire
• Provide a grounding point near the power supply module. Ground the LG terminals and FG terminals of the power supply
module with the thickest and shortest wire possible. (The wire length must be 30cm (11.81inch) or shorter, and 2mm
(0.08inch) or less.)
• Twist the grounding wire from the grounding point with the power supply wire. Twisting the power supply wire and
grounding wire enables more noise from the power supply wire to run off to the ground. However, when a noise filter has
been installed on the power supply wire, twisting with the grounding wire is not required.
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