16
(3) COM2/3/4/5/6 (9-Pin): Serial Port Headers
Pin1
Pin6
D
C
D
S
IN
S
O
U
T
D
T
R
G
N
D
D
S
R
R
T
S
C
T
S
R
I
COM2/3
COM4/5/6
D
C
D
Pin1
Pin6
S
IN
S
O
U
T
D
T
R
G
N
D
D
S
R
R
T
S
C
T
S
R
I
(4) TX_RXCOM1(4-Pin): RS422/485 Header
Pin 1
R
X
D
N
T
X
D
P
R
X
D
P
T
X
D
N
4
2
3