Advantech ADAM-5511 Manual page 332

Single Point Grounding
+16V
+22V
More cable, but more stable system.
The above diagram shows you that a single point grounding system
will be a more stable system. If you use thin cable for powering these
devices, the end device will actually get lower power. The thin cable
will consume the energy.
+18V +20V
+22V +22V
+24 V
Power
Supply
+22
+22
+24
Power
Supply
V