CNV 504N/508N - Coupling/decoupling networks for signal/data lines

Surge pulses or Ringwave pulses are applied to unshielded unsymmetrical interconnection lines (signal/data lines) by means of standalone coupling/decoupling networks. For such testing EM TEST offers a range of CNVs for either 4 or 8 signal/data lines. 

According to IEC/EN 61000-4-5 resp. IEC/EN 61000-4-12 the pulses are coupled via different coupling elements such as capacitors or gas arrestors depending on the characteristics of the line signals. 

CNV 504N/508N series - Multifunctional coupling/decoupling networks

The EM TEST CNV 504N/508N series of coupling decoupling networks are multifunctional CNVs for the application of Surge and Ringwave pulses onto signal/data lines. 

The standard CNV 504N/508N models combine three different applications; coupling of Surge pulse via capacitor or gas arrestor and coupling of Ringwave pulses via capacitor being required by the relevant standards. The required coupling mode can easily be selected by means of a simple jumper.

The CNVs also include the required decoupling part consisting of decoupling inductors of 20mH for each line. To protect the auxiliary equipment being needed for testing the DUT an additional protection circuit is integrated at the signal/data line input.

EM TEST offers CNV 504N/CNV 508N coupling/decoupling networks for various test voltages up to 10kV and for higher signal voltages/currents (up to 600V and up to 4A). Dedicated CNVs are available e.g. for railway applications as per EN 50155 and for other customer specific test applications.

Coupling

Multifunctional Coupling for Surge and Ringwave

The EM TEST CNV 504N/508N series of coupling
decoupling networks are multifunctional CDNs for the
application of Surge and Ringwave pulses onto
signal/data lines.

 Surge as per IEC 61000-4-5 Ed.3, Figure 9
- Capacitor 0.5 uF with 40 ohm
- GDT gas arrestor with 40 ohm

 Ringwave as per IEC 61000-4-12 Ed.2, Figure 9
- Capacitor >3.3 uF