Reliant EMC

CDNs - coupling-decoupling network

Laplace supply a wide range of CDNs that are fully compliant to IEC61000-4-6.
In addition to a range of 'conventional' CDNs, Laplace are unique in offering two other types. Both types are 'versatile' in that they are configurable, offering great flexibility in terms of the type of cable each model can be used with. This reduces the number of CDNs necessary to hold in stock. The final type is, in addition to being versatile, fitted with an output which monitors the RF level applied to the cable.

Laplace Instruments CDN - Coupling decoupling Network


 Type
 Description
 Standard
 Conventional CDNs. Compliant to IEC61000-4-6.
Wide range of models to suit a wide variety of cable types
 Versatile
 Compliant to IEC61000-4-6. Just 5 models. Each model is versatile and can be configured to suit a wide range of cable types. Over 25 different cable types can be accommodated by these 5 models.
 Enhanced
 Identical to the versatile type described above, but with the additional benefit of the inclusion of a feedback network and detector such that the applied stress level can be monitored and used (if required) as part of the level control system.

 

Standard
These are grouped into three classes:
• Mains power cables
• Unscreened cables
• Screened cables

 

Versatile and Enhanced
These types are multi-functional. This versatility means that the need to carry a large range of different types of CDN to cope with potential requirements is avoided. One type of calibration adaptors fits all models. Each type includes just 6 basic models:
TYPE
VERSATILE
ENHANCED
CABLES
Mains power
S46M3
E46M3
M1, M2, M3
Screened cables up to 25 cores
S46S25
E46S25
S1 TO S25
Unscreened cables up to 24 cores
S46T24
E46T24
T2, T3, T4, T5, T6, T8, T12, T24
Telecom cables to 8 cores
S46ST8
E46ST8
1, 2 OR 4 TWISTED PAIRS
Telecom cables to 6 cores
S46ST6
E46ST6
SCREENED OR UN-SCREENED 1,2,3 OR 6 CORE
3 Phase high power
S46M5/9
---------
M2, M3, M4, OR M5 + AUX LINES

 

In addition, the S46M5/9 is a multi-function CDN capable of 100A rating for M3 and M2 configuration, or 50A in M5 and M4 (three phase) configurations. This CDN also has an additional 4 cores rated at 6A for ground wire, control or sensing requirements.
 
Each model can be configured to cover a wide variety of cables, and still maintain full compliance with IEC61000-4-6. The Enhanced models can be used in conjunction with a suitable signal generator such that closed loop level control can be achieved. This offers the advantages of greater efficiency, reduced RF power requirement and better accuracy for the applied RF level.
 
Note that the RFIC-4-6 synthesiser system from Laplace offers the capability to work with the enhanced CDNs (as well as standard and versatile types). Other synthesisers will not work in the 'enhanced' mode.

 

Additional Acessories:
46GP Ground Plane
46XP Extended Ground plane
 

Associated Downloads

Laplace Instruments Advanced CDNs for EMC and EMI Testing
Laplace Instruments Enhanced CDNs Paper presented at the York EMC Symposium 1999
Laplace Instruments CDN Type x46xx Versatile Coupling Decoupling Network Users Manual
Laplace Instruments High Current CDN

 

Laplace Instruments

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