DFI HD632-H81 - Manual (Page 17)

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17
Chapter 2 Hardware Installation
Chapter 2
COM3 RS422/485 Select COM1/COM2 RS232/Power Select
1
3
2
4
3-4 On: RS485 1-2 On: RS422
(default)
1
3
2
4
1-3 (RI), 2-4 (DCD) On:
RS232 (default)
5 3 1
6 4 2
JP15 (for COM 1) and JP14 (COM 2) are used to configure Serial COM ports to pure RS232 or
RS232 with power. The pin functions of COM 1 and COM 2 will vary according to JP14’s and
JP15’s setting respectively.
JP2 is used to configure the COM port 3 to RS422 or RS485. The pin functions of the COM
port will vary according to the jumper’s setting.
JP2
COM 3:
RS422/485
COM 1
COM 2
JP14
JP15
3-5 (+5V), 4-6 (+12V) On:
RS232 with power
5 3 1
6 4 2
10
2 1
9
JP2
COM 3
DATA+
N.C.
10
2 1
9
N.C.
N.C.
N.C.
DATA-
N.C.
N.C.
N.C.
10
2 1
9
RXD+
N.C.
N.C.
N.C.
TXD+
RXD-
N.C.
N.C.
TXD-
1
3
2
4