Advantech ADAM-4570W User Manual page 27

Of course, you can select just one ADAM-4570W if you like. When you
select a specific device, the LED that stands for "Status" will be lit for 8
minutes. If you select another device, the "Status" LED of the first
selected device will turn off.
Figure 3.3: Locate the Specific ADAM-4570W
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