Com1/Com2 Rs232/422/485 Select - DFI SD331-C236 User Manual

COM1/COM2 RS232/422/485 Select

JP7
JP10
COM 1
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.
JP8
JP12
JP13
JP11
COM 2
1
9
2
JP7 (COM 1)/JP11 (COM 2)
2 4 6
5
6
4 3
2
1
1 3 5
1-2 On:
RS232 (default)
2 4 6
1 3 5
1-3, 2-4 On:
RS232 (default)
6 5
4 3
2 1
1-3, 2-4 On:
RS232 (default)
1 2 3 4 5
6 7 8 9
Pin RS232 RS232 with power
1
DCD- +12V
2
RXD RXD
TXD TXD
3
DTR- DTR-
4
GND GND
5
DSR- DSR-
6
RTS- RTS-
7
CTS- CTS-
8
RI- +5V
9
16
2 4 6
2 4 6
5
6
4 3
2
1
1 3 5
1 3 5
3-4 On:
5-6 On:
RS422 Full Duplex
RS485
JP8/JP10 (COM 1)
2 4 6 2 4 6
1 3 5
1 3 5
3-5, 4-6 On:
3-5, 4-6 On:
RS422 Full Duplex
RS485
JP12/JP13 (COM 2)
6 5
6
3
4
4
2 2
1
3-5, 4-6 On: 3-5, 4-6 On:
RS422 Full Duplex RS485
COM 1/COM 2
1
9
2
RS422 Full Duplex RS485
RXD+ DATA+
RXD-
TXD+
TXD-
GND
N.C.
N.C.
N.C.
N.C.
5
6
4 3
2
1
5
3
1
DATA-
N.C.
N.C.
GND
N.C.
N.C.
N.C.
N.C.