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14.4 Coupling decoupling networks for data lines
14.4.1 Surge CDN for unsymmetrical data lines CDN 117
Teseq’s CDN 117 coupling-decoupling network
enables convenient testing with surge pulses of
1.2 / 50 μs on data, signal or peripheral lines, as specified in many product standards. The test
method, severity levels, permissible reaction of the EUT and specification of the coupling networks
are included in IEC / EN 61000-4-5.
All coupling methods described in IEC / EN 61000-4-5
for unshielded unsymmetrical line pairs can
be performed both in differential- and common mode coupling (line-to line and line-to-ground).
The user can manually select coupling modes
by connecting the surge generator’s output to the
appropriate input of the CDN 117.
Several CDN 117s can be arranged in parallel
for applications in which more than two conductors
must be decoupled.
The CDN 117 can be easily interfaced with the EUT
and is designed as a bench top unit. It can be
used with Teseq’s NSG series or any industry standard surge generator with the appropriate
connector adapter.
Technical specifications
Signal line
Max. operating voltage:
AC 250 VDC 250 V
Max. operating current:
1.5 A
Ohmic resistamce per path:
2.5 Ω
Decoupling chokes 1 KHz:
20 mH nominal
Pulse:
1.2 / 50 μs pulse
Max. pulse voltage:
6.6 kV
Accessories:
Series resistor:
2 x 40 Ω, 6 W
Coupling adapters:
INA 170
Sparkling gap device,
90 V trip voltage
INA 171
Capacity 0.1 μF / / spark gap,
device, 90 V trip voltage
INA 174
Capacitor 0.5 μF