Coupling To I / O Lines; Test Set-Up - EM TEST compact NX5 Series Operation Manual

EM TEST Compact NX5
10.6.2.

Coupling to I / O lines

The coupling to I/O lines is generally realized with other
coupling networks than for power supply lines. The loading
of the I/O lines with big coupling capacitors is mostly not
possible. The data transmission may be disturbed.
For coupling to I/O lines special couplers according the
Standard IEC 61000-4-5 are available, such as the CDN
CNV 504N- and the
CNV 508N-series for four respectively for eight wire
systems.
For many applications a special coupling network is
required.
Using coupling networks CNV series
Switch OFF the high voltage during
manual change of the coupling
Danger

10.7. Test set-up

According to the specifications of IEC 61000-4-5, the surge generator has a source impedance of 12 Ω when the
simulator is coupled between the lines and protective earth.
This will activate fault current detectors or protectors which may be installed in the laboratory.
Therefore it is important
- not to disconnect the surge simulator form protective earth (power cable)
- to have an installation where the simulator is connected via its ground reference connector to earth
Setup for unsymmetrical data lines Setup for symmetrical data lines
Operating Manual V 1.06 104 / 143