5. Envelope. External links
The printed circuit board must be housed in an enclosure with at least IP 20 protection (determined in accordance with EN 60529).
Figure 16 shows a possible layout which, in addition to complying with the requirements of Table 5 , must also meet the following rules: the connection terminals of intrinsically safe circuits must be separated from the connection terminals of non-intrinsically safe circuits by one or more of the methods described in this paragraph 5
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Envelope. External links
Intrinsic safety systems
Bibliography
Regulatory texts
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Equipment construction regulations
Directives in force
Directive 94/9/EC of March 23, 1994 on the approximation of the laws of the Member States concerning equipment and protective systems intended for use in potentially explosive atmospheres.
Official Journal of the European Communities, April 19, 1994.
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Standardization
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European standards EN
French NF standards are the French versions of European standards.
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