16
COM1/COM2 RS232/422/485 Select
JP7/JP8/JP10 (for COM 1) and JP11/JP12/JP13 (for COM 2) are used to configure the COM
ports to RS232, RS422 (Full Duplex) or RS485. When COM 1 RS232/422/485 is selected, JP8
and JP10 must be set in accordance to JP7. When COM 2 RS232/422/485 is selected, JP12
and JP13 must be set in accordance to JP11. The pin functions of the COM ports will vary ac-
cording to the jumpers’ setting.
COM 2
COM 1
JP11
2
1
9
JP7
JP8
JP10
JP12
JP13
JP7 (COM 1)/JP11 (COM 2)
COM 1/COM 2
1 2 3 4 5
6 7 8 9
1-2 On:
RS232 (default)
3-4 On:
RS422 Full Duplex
5-6 On:
RS485
2
4 6
1 3
5
2
4 6
1 3
5
2
4 6
1 3
5
2
1
9
Pin
RS232
RS232 with power
RS422 Full Duplex
RS485
1
DCD-
+12V
RXD+
DATA+
2
RXD
RXD
RXD-
DATA-
3
TXD
TXD
TXD+
N.C.
4
DTR-
DTR-
TXD-
N.C.
5
GND
GND
GND
GND
6
DSR-
DSR-
N.C.
N.C.
7
RTS-
RTS-
N.C.
N.C.
8
CTS-
CTS-
N.C.
N.C.
9
RI-
+5V
N.C.
N.C.
JP8/JP10 (COM 1)
1-3, 2-4 On:
RS232 (default)
3-5, 4-6 On:
RS422 Full Duplex
3-5, 4-6 On:
RS485
JP12/JP13 (COM 2)
2
4 6
1 3
5
2
4 6
1 3
5
2
4 6
1 3
5
1-3, 2-4 On:
RS232 (default)
3-5, 4-6 On:
RS422 Full Duplex
3-5, 4-6 On:
RS485
1
3
5
2
4
6
1
3
5
2
4
6
1
3
5
2
4
6
2
4
6
1
3
5
1
3
5
2
4
6
1
3
5
2
4
6
