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17
Chapter 2 Hardware Installation
Chapter 2
COM1/COM2 RS232/422/485 Select
JP2 (for COM 1) and JP11 (for COM 2) are used to configure the COM ports to RS232, RS422
(Full Duplex) or RS485. The pin functions of the COM ports will vary according to the jumper’s
setting.
JP2/JP11
RS232
RS422
Full Duplex
RS485
COM 1/ COM 2
DCD-
TD
RD
DT
R-
GND
1 2 3 4 5
RT
S-
RI
-
DSR
-
CTS-
6 7 8 9
RXD+
TXD+
RXD-
TXD- N.C.
1 2 3 4 5
6 7 8 9
N.C. N.C. N.C. N.C.
DA
TA
+
DA
TA
-
N.C. N.C. N.C. N.C.
6 7 8 9
1 2 3 4 5
N.C.
N.C.
N.C.
COM1/COM2 RS232/Power Select
1-3 (RI), 2-4 (DCD) On:
RS232 (default)
1
3
5
2
4
6
1-2 On: RS232
(default)
1
3
5
2
4
6
3-4 On: RS422
Full Duplex
1
3
5
2
4
6
5-6 On: RS485
1
3
5
2
4
6
3-5 (+5V), 4-6 (+12V) On:
RS232 with power
1
3
5
2
4
6
JP3 (for COM 1) and JP14 (for COM 2) are used to configure Serial COM ports to pure RS232
or RS232 with power. The pin functions of COM 1 and COM 2 will vary according to JP3’s and
JP14’s setting respectively.
COM 1
COM 2
COM 1
COM 2
COM2
COM1
JP11
JP2
COM2
COM1
JP14
JP3
