DFI SD631-C236, User Manual

Page: 16 / 75

16
COM1/COM2 RS232/422/485 Select
JP7
JP5
COM 1
COM 2
10
2
1
9 JP2
JP1
JP3
JP6
JP5/JP6/JP7 (for COM1) and JP1/JP2/JP3 (for COM2) are used to configure the COM ports to
RS232, RS422 (Full Duplex) or RS485. When COM 1 RS232/422/485 is selected, JP6 and JP7
must be set in accordance to JP5. When COM 2 RS232/422/485 is selected, JP2 and JP3 must
be set in accordance to JP1. The pin functions of the COM ports will vary according to the
jumpers’ setting.
10
2
1
9
1 3 5
2 4 6
1 3 5
2 4 6
1
3 5
2 4 6
2 4 6
1
3 5
JP5 (COM 1)/JP1 (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
Pin RS232 RS422 Full Duplex RS485
1
DCD- RXD+ DATA+
2
RXD RXD- DATA-
3
TXD TXD+ N.C.
4
DTR- TXD- N.C.
5
GND GND GND
6
DSR- N.C. N.C.
7
RTS- N.C. N.C.
8
CTS- N.C. N.C.
9
RI- N.C. N.C.
JP6/JP7 (COM 1)
1-3, 2-4 On:
RS232 (default)
3-5, 4-6 On:
RS422 Full Duplex
3-5, 4-6 On:
RS485
JP2/JP3 (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
2 4 6
1 3 5