Jetway Computer NC9BU - Manual (Page 21)

16
(7) RS422/485 Header: TX-RXCOM
TX-RXCOM Header
TX-RXCOM
Pin 1
TX
D
P
TX
D
N
2
RX
D
P
RX
D
N
(8) USB 2.0 Port Headers (9-pin): USB1/USB2
USB Port Header
VC
C
Pin 1
-DA
T
A
GN
D
+D
A
T
A
VC
C
NC
- DA
T
A
GN
D
+D
A
T
A
(9) Power LED: 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.
(10) Speaker Header: SPEAK
This 4-pin header connects to the case-mounted speaker. See the figure below.
(11) CIR Header: CIR
This 4-pin CIR header is to receive remote control signal.