Advantech ADAM-5511 Manual page 324

Unfortunately, it's impossible to finish a system integration task at one
time. We always meet some trouble in the field. A communication
network or system isn't stable, induced noise or equipment is damaged
or there are storms. However, the most usual issue is just simply
improper wiring, ie, grounding and shielding. You know the 80/20 rule
in our life: we spend 20% time for 80% work, but 80% time for the last
20% of the work. So is it with system integration: we pay 20% for Wire
/ Cable and 0% for Equipment. However, 80% of reliability depends on
Grounding and Shielding. In other words, we need to invest more in
that 20% and work on these two issues to make a highly reliable
system.
This application note brings you some concepts about field grounding
and shielding. These topics will be illustrated in the following pages.
1. Grounding
1.1 The 'Earth' for reference
1.2 The 'Frame Ground' and 'Grounding Bar'
1.3 Normal Mode and Common Mode
1.4 Wire impedance
1.5 Single Point Grounding
2. Shielding
2.1 Cable Shield
2.2 System Shielding
3. Noise Reduction Techniques
4. Check Point List