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19
Chapter 4 Hardware Installation
Chapter 4
Power-on Select
1-2 On:
Power-on via power button
(default)
2-3 On:
Auto power-on
JP5
3
1
2
JP5 is used to select the method of powering on the system. If you want the system to
power-on whenever AC power comes in, set JP5 pins 2 and 3 to On. If you want to use the
power button, set pins 1 and 2 to On.
When using the JP5 “Power On” feature to power the system back on after a power failure
occurs, the system may not power on if the power lost is resumed within 5 seconds (power
flicker).
Note:
In order to ensure that power is resumed after a power failure that re covers within a
5 second period, JP5 must be set to pins 2-3 and the “AC Power Lose” in CMOS is set
to “On”.
3
1
2
COM 2 RS232/RS422/RS485 Select
5-6 On: RS485
JP3 is used to configure the COM port 2 to RS232, RS422 (Full Duplex) or RS485. The pin
function of the COM port will vary according to the jumper’s setting.
JP3
6
4
2
5
3
1
COM 2
JP3
RS232
RS422
Full Duplex
RS485
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
2
1
9
D
ATA
+
N.C. N.C. N.C. N.C.
DA
TA
-
N.C.
N.C. N.C.
9
RXD+ TXD+ N.C. N.C. N.C.
RXD- TXD- N.C. N.C.
2
1
9
DCD- TD GND RT
S-
RI
-
RD
DT
R-
DSR
-
CTS-
2
1
