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CN19: COM4 Connector (5x2 Header)
PIN Description PIN Description
1
DCD4
3
RXD4
5
TXD4
7
DTR4
9
GND
CN10: RS-422/485 Connector (5x2 Header, COM2)
PIN Description PIN Description
1
TX-
3
RX+
5
GND
7
RTS+
9
CTS-
NOTE:
The terminal resistance of RX & TX is set at 180
JP5: RS-422/485 Receiver Enabled/Disabled Select
Options
Always Enable
Enable by "-RTS" Signal
Always Disabled (default)
JP6: COM2 use RS-232 or RS-422/485 Select
Options
RS-232 (default)
RS-422/485
NOTE:
RS-422/485 port uses COM2. RS-232 of COM2 cannot be used
while RS-422/485 is selected.
2
DSR4
DCD4
4
RTS4
RXD4
6
CTS4
8
RI4
TXD4
10
N/C
DTR4
GND
2
TX+
TX-
4
RX-
6
RTS-
RX+
8
CTS+
GND
10
N/C
RTS+
CTS-
Settings
Short 1-2
Short 3-4
All Open
Settings
Open
Short
1
2
DSR4
3
4
RTS4
5
6
CTS4
7
8
RI4
9
10
N/C
1
2
TX+
3
4
RX-
5
6
RTS-
7
8
CTS+
9
10
N/C
.
Ω
1
3
2
4
1
2
17
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