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APPX
Appendix 4 EMC and Low Voltage Directives
Appendix 4
EMC and Low Voltage Directives
In each country, laws and regulations concerning electromagnetic compatibility (EMC) and electrical safety are enacted. For
the products sold in the European countries, compliance with the EU's EMC Directive has been a legal obligation as EMC
regulation since 1996, as well as the EU's Low Voltage Directive as electrical safety regulation since 1997.
Manufacturers who recognize their products are compliant with the EMC and Low Voltage Directives are required to attach a
"CE marking" on their products in European countries.
In some other countries and regions, manufacturers are required to make their products compliant with applicable laws or
regulations and attach a certification mark on the products as well (such as UK Conformity Assessed (UKCA) marking in the
UK, and Korea Certification (KC) marking in South Korea).
Each country works to make their regulatory requirements consistent across countries based on international standards.
When the requirements are consistent, measures to comply with the EMC and electrical safety regulations become common
across countries.
The UK and South Korea have enacted EMC regulations whose requirements are consistent with those of the EMC Directive.
The UK has also enacted electrical safety regulations whose requirements are consistent with those of the Low Voltage
Directive. In this section, the requirements of the EMC and Low Voltage Directives are described as examples of those of the
EMC and electrical safety regulations.
Measures to comply with the EMC Directive
The EMC Directive specifies that "products placed on the market must be so constructed that they do not cause excessive
electromagnetic interference (emissions) and are not unduly affected by electromagnetic interference (immunity)".
This section summarizes the precautions on compliance with the EMC Directive of the machinery constructed with the
module.
These precautions are based on the requirements and the standards of the regulation, however, it does not guarantee that the
entire machinery constructed according to the descriptions will comply with abovementioned directives.
The method and judgment for complying with the EMC Directive must be determined by the person who constructs the entire
machinery.
EMC Directive related standards
■ Emission requirements
*1 QP: Quasi-peak value, Mean: Average value
Specifications Test item Test details Standard value
EN61131-2: 2007 CISPR16-2-3
Radiated emission Radio waves from the product are
measured. • 30M-230MHz QP: 40dB

V/m (10m in measurement range)
*1
• 230M-1000MHz QP: 47dB

V/m (10m in measurement range)
CISPR16-2-1,
CISPR16-1-2
Conducted emission Noise from the product to the power
line is measured. • 150k-500kHz QP: 79dB, Mean: 66dB
*1
• 500k-30MHz QP: 73dB, Mean: 60dB