Jetway Computer NF9U - Manual (Page 15)

10
JP5 (4-pin): COM1 Port Pin9 Function Select
JP5→COM1 Port
4-6 Close:
RI= +12V.
6 4 2
3-4 Close:
RI= +5V;
2-4 Close:
RI=RS232;
3 1 5 1 3 5
2 4 6
1 3 5
2 4 6
JP7 (4-pin): COM2 Header Pin9 Function Select
JP7 → COM2 Header
4-6 Close:
RI= +12V.
1
3
5
3-4 Close:
RI= +5V;
2-4 Close:
RI=RS232;
4
6
2
6 5
3
1 4
2
5
3
1 6
4
2