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Emc Directive; Requirements For Compliance With The Emc Directive; Emc Directive Related Standards; Installation To Control Panel - Mitsubishi Electric MELIPC MI3321G-W Safety Manuallines

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4

EMC DIRECTIVE

Compliance with the EMC Directive, which is one of the EU directives, has been mandatory for products sold within EU member states since
1996.
If a product meets the requirements of the EMC Directive, the manufacturer of the product must declare conformity of the product and affix
the "CE mark" to the product.
The sales representative in EU member states is:
Company: Mitsubishi Electric Europe B.V.
Address: Mitsubishi-Electric-Platz 1, 40882 Ratingen, Germany
4.1

Requirements for Compliance with the EMC Directive

The EMC Directive sets requirements for emission (conducted and radiated electromagnetic interference emitted by a product) and
immunity (the ability of a product not to be influenced by externally generated electromagnetic interference).
This product complies with the EMC Directive related standards as follows.
The manufacturer of the machinery must determine the testing method for compliance and declare conformity to the EMC Directive.
4.2

EMC Directive Related Standards

Item
Emission
Immunity
4.3

Installation to Control Panel

This product is an open type device (device built into another device) and must be installed in the control panel. It not only assure the safety
but also has a large effect to shut down the noise generated from the product, on the control panel.
Control panel
• The control panel must be conductive.
• When fixing a top or bottom plate of the control panel with bolts, do not coat the plate and bolt surfaces so that they will come into contact.
And connect the door and box using a thick grounding cable in order to ensure the low impedance under high frequency.
• When using an inner plate to ensure electric conductivity with the control panel, do not coat the fixing bolt area to ensure conductivity in
the largest area as possible.
• Ground the control panel using a thick grounding cable in order to ensure the low impedance under high frequency.
• The diameter of cable holes in the control panel must be 10 cm (3.94 inch) or less.
Otherwise, radio waves may leak.
Since the radio waves leak through the space between the control panel and its door, reduce as much as space as possible.
By pasting the EMI gasket directly on the painted surface to seal the space, leak of radio waves can be suppressed.
A test has been carried out by Mitsubishi on a panel having the damping characteristics of 52 dB max. and 37 dB mean (measured by 3 m
method with 30 to 300 MHz).
Connection of power and ground cables
• Provide a grounding point near the product. Short-circuit the FG terminal of the product (FG: frame ground) and ground it with the thickest
and shortest cable possible. (The cable length must be 30 cm (11.81 inch) or shorter.) As the FG terminal transmits the noise generated in
the product to the ground, ensure the lowest impedance possible accordingly.
As the wires are used to relieve the noise, the wire itself carries a large noise content and thus short wiring means that the wire is
prevented from acting as an antenna.
Note) A long conductor will become a more efficient antenna that emits noise.
• Twist the ground cable led from the ground point with the power cable.
Doing so can relieve the noise issued through the power cable to the ground widely.
11
EN 55011:2009 +A1:2010 (Group 1, Class A)
EN55022:2010 +AC:2011 Class A
EN61000-6-4:2007 +A1:2011
EN 55024:2010:2010+A1:2015
EN61000-6-2:2005 +AC:2005
Standards

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