Omron CPM2A - 11-2005, Руководство пользователя

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6
EC Directives
xxi
6-4 Relay Output Noise Reduction Methods
The CPM2A PCs conform to the Common Emission Standards (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 coun-
termeasures 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. Following are examples
of countermeasures for reducing the generated noise.
Countermeasures
(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.