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COM 1/COM 2 RS232/422/485 Select
JP4 (for COM 1) and JP6 (for COM 2) are used to configure the COM ports to RS232, RS422
(Full Duplex) or RS485. The pin functions of COM ports will vary according to jumpers' setting.
Chapter 3 Jumper Settings
Chapter 3
COM 1:
RS232/422/485
9
COM 1
JP4
JP6
2 1
COM 2:
RS232/422/485
COM 2
JP4 (for COM 1)/JP6 (for COM 2)
6
5
4
3
2
1
1-2 On: RS232
(default)
9
RI-
RTS-
CTS-
GND
DSR-
TXD
DTR-
RXD
DCD-
2 1
RS232
1 2 3 4 5
6 7 8 9
RS232
15
5
6
6
5
4
3
4
3
2
1
2
1
3-4 On: RS422
5-6 On: RS485
Full Duplex
COM 1
9
9
NC.
NC.
NC.
NC.
NC.
NC.
NC.
NC.
NC.
NC.
NC.
TXD
TXD-
TXD+
RXD-
RXD+
DATA-
DATA+
2 1
2 1
RS422
RS485
Full Duplex
COM 2
1 2 3 4 5
1 2 3 4 5
6 7 8 9
6 7 8 9
RS422
RS485
Full Duplex
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