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16
Chapter 2 Hardware Installation
Chapter 2
COM1/COM2 RS232/Power Select
JP8 (for COM 1)
JP4 (for COM 2)
JP8 (for COM 1) and JP4 (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 JP8’s and
JP4’s settings respectively.
COM 1
COM 1/COM 2
1 2 3 4 5
6 7 8 9
Pin
RS232
RS232 with power
1
DCD-
+12V
2
RD
RD
3
TD
TD
4
DTR-
DTR-
5
GND
GND
6
DSR-
DSR-
7
RTS-
RTS-
8
CTS-
CTS-
9
RI-
+5V
COM 2
2
1
9
2
1
9
JP8 (for COM 1)
1-3 (RI-), 2-4 (DCD-) On:
RS232 (default)
3-5 (+5V), 4-6 (+12V) On:
RS232 with power
2
4 6
1 3
5
2
4 6
1 3
5
JP4 (for COM 2)
1-3 (RI-), 2-4 (DCD-) On:
RS232 (default)
3-5 (+5V), 4-6 (+12V) On:
RS232 with power
2
4 6
1 3
5
2
4 6
1 3
5