Jetway Computer NF76 - Manual (Page 15)

(7) JP9:COM2 Pin9 select
JP9
1-2 closed: R
10
(8) JP10: RS232/422/485 Function Select
3-4 closed : +12V
1
S232
1
5-6 closed : +5V
1
JP10
1-2 closed: 3-4 closed : RS485
1
RS232
1 1
5-6 closed : RS422