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EC Directivesx
6-4
Relay Output Noise Reduction Methods
Countermeasures
The C200HX/C200HG/C200HE PCs conform to the Common Emission Stan-
dards (EN61000-6-4) of the EMC Directives. However, the noise generated
when the PC is switched ON or OFF using the relay output may not satisfy these
standards. In such a case, a noise filter must be connected to the load side or
other appropriate countermeasures must be provided external to the PC.
Countermeasures taken to satisfy the standards vary depending on the devices
on the load side, wiring, configuration of machines, etc. Examples of counter-
measures for reducing the generated noise are given on page 137.
(Refer to EN61000-6-4 for more details.)
Countermeasures are not required if the frequency of load switching for the
whole system with the PC included is less than 5 times per minute.
Countermeasures are required if the frequency of load switching for the whole
system with the PC included is 5 times or more per minute.
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