38
A
A
X
X
4
4
B
B
R
R
-
-
U
U
O
O
n
n
l
l
i
i
n
n
e
e
M
M
a
a
n
n
u
u
a
a
l
l
RTS#
RI#
GND
SOUT
DCD#
C
C
o
o
n
n
n
n
e
e
c
c
t
t
i
i
n
n
g
g
C
C
O
O
M
M
2
2
C
C
o
o
n
n
n
n
e
e
c
c
t
t
o
o
r
r
This motherboard comes with a COM1 connector on the back panel. However, we provide an extra COM2 connector for your
convenience. Once you need to connect a device via COM2, just connect a suitable cable on it.
CTS#
DSR#
DTR#
SIN
2 1
Pin1
