Jetway Computer NC9I - Manual (Page 16)

11
(7) JP7 (6-pin):COM2 Pin9 function select
3-4 closed : +12V;
JP7
1-2 closed: RS232;
1
5-6 closed : +5V
1
1
(8) JP8 (6-pin):COM2 Port RS232/485/422 Function Select
3-4 closed : RS485;
JP8
1-2 closed: RS232;
1
5-6 closed : RS422
1 1