DFI SB332-C - Manual (Page 17)

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17
Chapter 2 Hardware Installation
Chapter 2
COM1 RS232/RS422/RS485 Select
JP1 (for COM1) is used to configure the COM ports to RS232, RS422 (Full Duplex) or RS485.
The pin function of the COM ports will vary according to the jumper’s setting.
JP1
5-6 On: RS485
6 4 2
5 3 1
JP1
RS232 RS422
Full Duplex
RS485
COM 1
DCD- TD RD DT
R-
GND
1 2 3 4 5
RT
S-
RI
-
DSR
-
CTS-
6 7 8 9
6 4 2
5 3 1
1-2 On: RS232
(default)
3-4 On: RS422
Full Duplex
6 4 2
5 3 1
RXD+ TXD+ RXD- TXD- N.C.
1 2 3 4 5
6 7 8 9
N.C. N.C. N.C. N.C.
D
ATA
+
D
ATA
-
N.C. N.C. N.C. N.C.
6 7 8 9
1 2 3 4 5
N.C. N.C. N.C.