Moxa MXNVR-RO
Hardware Connection Description
3-5
Connecting to a Serial Device
Use a serial cable to plug your serial device into
the embedded computer’s serial port. Serial ports
P1 to P2 have male DB9 connectors and can be
configured for RS-232, RS-422, or RS-485 using
software. The pin assignments are shown in the
table at the top of the next page.
DB9 Male Port
RS-232/422/485 Pinouts
Pin
RS-232
RS-422
RS-485-4W RS-485-2W
1
DCD
TxDA(-)
TxDA(-)
–
2
RxD
TxDB(+)
TxDB(+)
–
3
TxD
RxDB(+)
RxDB(+)
DataB(+)
4
DTR
RxDA(-)
RxDA(-)
DataA(-)
5
GND
GND
GND
GND
6
DSR
–
–
–
7
RTS
–
–
–
8
CTS
–
–
–
9
–
–
–
–
NOTE
This is the pin assignment for the computer-side connectors on the MXNVR-RO-T. If you are wiring
peripheral-side connectors for a serial cable, you will need to match the pin assignment.
Connecting an Audio Input
The MXNVR-RO-T comes with an M12 X-coded audio input/output connector, allowing users to connect a
speaker or earphones.
Pin
Audio
1
Line-in, right
2
GND
3
Line in plug-in detected
4
Line-in, left
5
Line-out, left
6
Line out, plug-in detected
7
Line-out, right
8
GND
NOTE
This is the pin assignment for the computer-side connectors on the MXNVR-RO-T shell. If you are wiring
peripheral-side connectors for an audio cable, you will need to mirror the pin assignment.
