Jetway Computer NF9D - Manual (Page 15)

10
(8) JP8 (6-pin): COM2 Port RS232/485/422 Function Select
3-4 Closed : RS485;
JP8
1
1-2 Closed: RS232;
1 1
5-6 Closed : RS422
(9)COPEN (2-pin): Case Open Message Display Function Select
Case Open Display Function
1-2 Short： Case Open
COPEN
1-2 Open： Normal
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.