JETWAY NF36-2600 Technical Manual page 18

(11)COPEN (2-pin): Case Open Message Display function select
COPEN
1-2 Open： Normal; 1-2 Short： Case Open
Case Open Display Function
Pin 1-2 shorted: Case open display function enabled. In this case if you case is
removed, next time when you restart your computer a message will be displayed
onscreen to inform you of this.
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