Advantech ADAM-5511 Manual page 331

Single Point Grounding
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Those devices will influence each other
with swiftly load change.
• What's Single Point Grounding?
Maybe you have had an unpleasant experience while taking a hot
shower in Winter. Someone turns on a hot water faucet somewhere
else. You will be impressed with the cold water!
The bottom diagram above shows an example of how devices will
influence each other with swift load change. For example, normally we
turn on all the four hydrants for testing. When you close the hydrant 3
and hydrant 4, the other two hydrants will get more flow. In other
words, the hydrant cannot keep a constant flow rate.
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