DFI CP330-NRM, User Manual

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28
2
Hardware Installation
COM 3 RS232/RS422/RS485 Select
JP4
JP4 is used to configure COM 3 to RS232, RS422 (Half Duplex) or RS485.
The pin function of COM 3 will vary according to the jumper’s setting.
6
1
5
2
JP4
COM 3
1-2 On: RS232
(default)
3-4 On: RS422
Half Duplex
5-6 On: RS485
6
4
2
5
3
1
6
4
2
5
3
1
6
4
2
5
3
1
1
9
2
DCD- TD
RD
D
TR
-
GND R
T
S-
DSR
-
CT
S-
RI
-
1
9
2
RXD+ N.C.
RXD-
N.C.
N.C. N.C.
N.C. N.C.
N.C.
1
9
2
DA
TA+
N.C.
DA
TA
-
N.C.
N.C. N.C.
N.C. N.C.
N.C.