CNV 504S/508S series - Coupling decoupling networks for unshielded communication lines
Surge pulses and Telecom Surge pulses are applied to unshielded symmetrical interconnection lines (communication lines) by means of standalone coupling/decoupling networks. For such testing EM TEST offers a range of CNVs for either 4 or 8 lines.
According to EN/IEC 61000-4-5, Fig. 14 the pulses are coupled via gas arrestors and a matching resistor per line.