DFI CD102 Series - Manual (Page 13)

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13
Chapter 2 Hardware Installation
Chapter 2
COM1 RS232/RS422/RS485 Select
JP2, JP3 and JP4 (for COM 1) are used to configure the Serial COM port to RS232, RS422 (Full
Duplex) or RS485. The pin functions of the COM 1 port will vary according to these jumpers’
setting.
JP3
5-6 On: RS485
COM 1
6 4 2
5 3 1
1-2 On: RS232
(default)
3-4 On: RS422
Full Duplex
JP3
COM 1
6 4 2
5 3 1
6 4 2
5 3 1
6 4 2
5 3 1
Note:
When COM1 RS232/422/485 is selected, JP2 and JP4 must be set in accordance to
JP3.
JP2
JP4
6 4 2
5 3 1
1-3, 2-4 On:
RS232 (default)
3-5, 4-6 On:
RS422 Full Duplex/RS485
RS485
D
ATA
+
D
ATA
-
N.C. N.C. N.C.
1 2 3 4 5
N.C. N.C. N.C. N.C.
6 7 8 9
RS422
Full Duplex
RXD+ TXD+ RXD- TXD- N.C.
N.C. N.C. N.C. N.C.
1 2 3 4 5
6 7 8 9
RS232
DCD- TD RD DT
R-
GND
RT
S-
RI
-
DSR
-
CTS-
1 2 3 4 5
6 7 8 9