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EMC Measures for the Communications Adapter

A.1 Overvoltage Protection for Remote Bus Lines

(lightning protection)

To protect transmission systems from flash–over voltage surges (e.g. lightning),

the remote bus line should be equipped with overvoltage protectors (lightning

arrestors) whenever it is installed outside a building. The nominal discharge

current should be at least 5 kA, for instance by using a type ARE, Cat. Nr. 919 232

made by

Dehn und Söhne, Postfach 1640, 92 306 Neumarkt, Germany

Dehn und Söhne, Hans– Dehn– Str. 1, 92 318 Neumarkt, Germany

Protecting a remote bus cable requires three ARE lightning arrestors per building.

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Schneider Electric INTERBUS Basic Bedienungsanleitung Seite 34