PCB - Ground strips at the Edges

[ssundar.shan]

Hi Friends,
Could anyone please explain me why Ground strips are implemented at the edges of the PCB especially in a module that is to be inserted into a chassis.

I can understand that, i could eliminate the components being placed at the edges, apart from this is there any other reasons?

Thanks and Regards,
Sundar

 

[SLK001]

It could be that the copper gives the guides something more solid to grasp instead of bare fiberglass or phenolic. It also could be a grounding point. Or, as you say, it prevents a designer from placing components where guides will slide.

 

[marce]

Bit of a generalisation, as it is not always the case, but historically for eurocard rack mounted cards it was because of the lack of number of layers, often on a 2 layer board you would have power on one layer ground on the opposite...
To prevent components near card guards keep out areas are better option as the outline of a component could overhand the ground strip and not cause an error....
In some instances cards go into metal guides and the ground strips are to make a connection, I would not worry to much about it and look at every job on its own merits.

 

[poojangarg]

It is provided generally with solder mask open to short it with metal housing, so that the PCB chasis ground id shorted with system ground.
This bypasses the ESD to system ground.

 

[prakashvenugopal]

This will bypass the Noise or ESD to the Ground.

 

[marce]

you need a very good connection for noise, unless the original poster provides more information then we can only sumise.....

 

[ssundar.shan]

Thanks a lot All.

Thanks and Regards,
Sundar