Hardware installation – DFI SR330-N User Manual
Page 28
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2
Hardware Installation
COM 3
COM 3 RS232/RS422/RS485 Select
JP6 is used to configure the COM 3 serial port to RS232, RS422
(Half Duplex) or RS485.
The pin function of COM 3 will vary according to JP6’s setting.
1-2 On:
RS232
(default)
5-6 On:
RS485
6
5
1
2
3-4 On:
RS422
Half Duplex
6
5
1
2
6
5
1
2
JP6
COM 3
DCD-
TD
RD
DTR-
GND
RTS-
DSR-
CTS-
RI-
2
2
2
2
2
1
1
1
1
1
9
9
9
9
9
JP6
RXD+
N. C.
RXD-
2
2
2
2
2
1
1
1
1
1
9
9
9
9
9
N. C.
N. C.
N. C.
N. C.
N. C.
N. C.
DATA+
N. C.
DATA-
2
2
2
2
2
1
1
1
1
1
9
9
9
9
9
N. C.
N. C.
N. C.
N. C.
N. C.
N. C.
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