Coupling/decoupling network for unshielded symmetrical interconnection lines (communication lines)

Model : CNV 504 / 508 T-Series

Q'ty :

CNV 504 / 508 T-Series

CNV 504 / 508 T-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. CNV 504T5 is designed for 4 lines (2 pairs), CNV 508T5 for 8 lines (4pairs) and can also be used for either 4 or 2 lines.

According to IEC 61000-4-5 Ed.3, (Fig. 10) the pulses are coupled via gas arrestors and a matching resistor per line.

As per IEC 61000-4-5 Ed.3, Fig 10/A4, ITU K.44
For test pulse 1.2/50 - 8/20µs and 10/700µs
Coupling via gas arrestor or other coupling
Built-in matching resistors
20mH decoupling, current compensated pairs
Test voltage up to 5kV
Line voltage 50V
Line current 1A

Surge 1.2 /50us

CNV 504 / 508 T-series - Surge coupling/decoupling networks for communication lines

The EM TEST CNV 504 / 508 T-series coupling/ decoupling networks are designed to couple Surge pulses (1.2/50us - 8/20us) and Telecom Surge pulses (10/700us) onto unshielded symmetrically operated communication lines.

The CNV-models includes the coupling via gas arrestor plus the internal matching resistor Rc as per figure 10 of IEC 61000-4-5 Ed.3 with values as per the formula given by the standard. All lines are subjected to the test pulse simultaneously with respect to ground.

The CNV also include the required decoupling part consisting of decoupling inductors of 20mH for each line, pairwise current compensated. To further protect the auxiliary equipment being needed for testing the DUT an additional protection circuit is integrated at the communication line input.

Surge 10/700 us
CNV 504 / 508 T-series - Telecom Surge coupling/decoupling networks for communication lines

The CNV 504 / 508 T-series is also designed as per figure A4 of IEC 61000-4-5 Ed.3 without primary protector. If required, an additional primary protector must be integrated according the user specifications.

With short circuit bridges and individual designed coupling devices the user can easy modify the coupling mode and number of tested lines to the requirements.

EM TEST offers CNV 504 / 508 T-series coupling/decoupling networks for test voltages up to 5kV.