
29
2
Hardware Installation
COM 2 is an RS-232 port. If the serial device connected to this
port requires 5V/12V power from the system board, set JP4 pins 3-
5 and 4-6 to On. Otherwise, leave this jumper’s setting at 1-3, 2-4
On.
2.4.7 COM 2 RS232/AUX Select
X
JP4
3-5 (5V),
4-6 (12V) On:
Auxiliary power
1-3, 2-4 On:
RS232
(default)
1
3
2
6
4
5
1
3
2
6
4
5