I am curious what your opinions and recommendations are on where to put the Shield on RS232 cables.
Here are all the options that I have heard to put the cable shield.
Pin1 on the DB25
Pin7(signal gound) on the DB25
Attach to Housing or outer shell on DB25
Connect both Pin1 & Pin7 on DB25
Pin1 on DB25 seems to be somewhat common from what I have seen in documentation. I have seen sometimes where there was issues on the machine and touching the outer shell to the machine has created a small spark. So my thought would to connect to Pin7 would make the most sense as this is signal ground or the reference voltage. However I am not all to sure. Does it make a difference using one shield config over another for longer cables? Are Pin1 and Pin7 generally connected together on the machine side?
Thanks for your insight and comments!