The Significance Of Shielded Control Cable Wire

The significance of shielded Control Cable Wire

1. The purpose of shielding is to ensure the transmission characteristics of the system software in the natural environment with interference signals. The anti-interference ability here should include two levels, that is, the function of resisting external interference signals and the system software itself radiating interference signals from external sources. Ability to work. In theory, wrapping a layer of metal composite material shielding layer on the surface of cables and connectors can reasonably filter out excess radio waves (this is also the way most of the shielding system software chooses now).

2. What is the reasonable level of such methods of shielding control cables? In terms of the shielding system software, it is far from enough to have a metal shielding layer, and more importantly, the interception layer must be a thoroughly Excellent grounding device, so that the amount of influence current can be reasonably led to the ground.

However, during the construction of a specific project, there are some difficulties that cannot be ignored in shielding the system software. Because the strict regulations on the system grounding device are shielded, it is easy to lead to poor grounding devices, such as excessive grounding wire resistance, the unbalanced potential difference of the grounding device, etc., which will cause a potential difference between two points of the transmission system software. , resulting in the amount of current on the shielding layer of the metal material, causing the shielding layer to not continue and destroying its consistency.

3. The shielding layer itself has already become the highest interference signal, so its characteristics are not comparable to the non-shielding system software. When the shielded cable transmits at a high frequency, it must be grounded on both sides, which is more likely to form a potential difference in the shielded layer.

It is not difficult to see that shielding the rules of the system software itself just constitutes the biggest obstacle to ensuring its characteristics. A completely shielded system requires shielding everywhere. Once everything is shielded and cannot meet the requirements, it will definitely interfere with The overall transfer characteristics of the system software. However, at this stage, there are very few Internet network switches or computers on the market that are suitable for shielding, so it is difficult to complete the shielding of all transmission lines.