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19
Chapter 4 Jumper Settings
Chapter 4
COM 1 RS232/422/485 Select
JP8, JP9 and JP11 are used to configure the Serial COM port 1 to RS232, RS422 (Full Duplex)
or RS485. The pin functions of the Serial COM port 1 will vary according to these jumpers’ set-
ting.
JP8
5-6 On: RS485
COM 1
6
4
2
5
3
1
1-2 On: RS232
(default)
3-4 On: RS422
Full Duplex
6
4
2
5
3
1
6
4
2
5
3
1
Note:
When COM 1 RS232/422/485 is selected, JP9 and JP11 must be set in accordance to
JP8.
JP8
6
4
2
5
3
1
JP9 JP11
6
4
2
5
3
1
1-3, 2-4 On:
RS232 (default)
3-5, 4-6 On:
RS422 Full Duplex/RS485
2
1
9
COM 1:
RS232/422/485
RS485
RS422
Full Duplex
RS232
2
1
9
RXD
DCD- TXD
D
TR
-
GND
DSR
-
RT
S-
CTS-
RI
-
2
1
9
RXD-
RXD+ TXD+
TXD-
NC.
NC.
NC.
NC.
NC.
2
1
9
D
ATA
-
D
ATA
+
TXD
NC.
NC.
NC.
NC.
NC.
NC.
