Jetway Computer NF9D - Manual (Page 20)

15
(6) COM2 (9-pin): RS232 Header
Serial COM Port 9-pin Block
Pin1
Pin6
DC
D
Pin5
DS
R
RX
D
TX
D DT
R GND
RT
S CT
S
RI
(7) TX-RXCOM (4-pin): RS422/485 Header
TX-RXCOM Header
Pin 1
TX
D
N
RX
D
P
T
XDP
2
RX
D
N
(8) Speaker Header (4-pin): SPEAK
This 4-pin connector connects to the case-mounted speaker. See the figure below.
(9) Power LED (3-pin): PWR LED
The Power LED is light on while the system power is on. Connect the Power LED
from the system case to this pin header.