DFI OT951-D series User Manual
Page 23
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23
2
Hardware Installation
COM1/COM2 RS232/RS422/RS485 Select
5-6 On: RS485
JP7 (for COM1) and JP8 (for COM2) are used to confi gure 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.
JP7/JP8
6
4
2
5
3
1
COM 1
COM 2
JP7
JP8
RS232
RS422
Full Duplex
RS485
COM 1 / COM 2
6
4
2
5
3
1
1-2 On: RS232
(default)
3-4 On: RS422
Full Duplex
6
4
2
5
3
1
DCD-
TD
GND
RT
S
-
RI
-
RD
DT
R
-
DSR
-
CT
S-
RXD+
TXD+
N.C.
N.C.
N.C.
RXD-
TXD-
N.C.
N.C.
2
1
9
D
ATA
+
N.C.
N.C.
N.C.
N.C.
D
ATA
-
N.C.
N.C.
N.C.
2
1
2
1
9
9
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