Jetway Computer NF9QU - Manual (Page 13)

8
Chapter 2
Hardware Installation
2-1 Jumper Setting
(1) JP1 (4-pin): COM1 Port Pin9 Function Select
JP1→COM1 Port
4-6 Closed:
RI= 12V.
6 4 2
3-4 Closed:
RI= 5V;
2-4 Closed:
RI=RS232;
3 1 5 1 3 5
2 4 6
1 3 5
2 4 6
(2) JP2 (4-pin): COM4 Header Pin9 Function Select
JP2→COM4 Port
4-6 Closed:
RI= 12V.
5
3
1
3-4 Closed:
RI= 5V;
2-4 Closed:
RI=RS232;
4
2
6
2 1
3
5
4
6
1
3
5
2
4
6