Jetway Computer NF9B - Manual (Page 25)

20
(8) COM3/COM4/COM5/COM6 (10-pin): Serial Port Header
6
DSR
RI
CTS
RTS
GND
TXD
DTR
5
Pin1
10
RXD
DCD
Serial Port Header
(9) TX-RXCOM (4-pin): RS422/485 Header
TX-RXCOM Header
Pin 1
TX
D
P
RX
D
N
TX
D
N
RX
DP
2
3 4