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6 Conformance to EC Directives
Observe the following precautions when installing the C200HS-CPU01-EC and
C200HS-CPU21-EC that conform to the EC Directives.
1, 2, 3... 1. Since the C200HS PC is defined as an open type, be sure to install it inside a
panel.
2. Provide reinforced insulation or double insulation for the DC power source
connected to the DC I/O Unit and for the CPU with a DC power source.
3. The C200HS PC that conforms to the EC Directives also conforms, as an
individual unit, to the Common Emission Standard (EN50081-2) of the EC
Directives. When incorporated into a device, however, the C200HS PC may
not satisfy this Standard due to the noise produced by the contact output
when it switches on and off. In such a case, it will be necessary to take coun-
termeasures such as connecting a surge or arc killer, or providing an exter-
nal means of protection for the PC. The countermeasures taken to satisfy
the Standard vary depending on the load devices, wiring, machinery config-
uration, etc. Described on page 130 are examples of countermeasures to be
taken to reduce the noise.
Criteria for Taking Countermeasures
(Refer to EN50081-2 for 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 not required if the frequency of load switching for the
whole system with the PC included is more than 5 times per minute.
Conformance to EC Directives
6
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