IEI Integration UPC-V312-D525 v1.10 - Manual (Page 58)

UPC-V312-D525 Panel PC
Page 45
3.8.1 ACC ON
NOTE:
In ACC On mode, the Power 1 connector must connect to the ACC on
signal to be able to control system power.
The ACC On mode is designed for vehicle applications. When the UPC-V312-D525 is in
ACC On mode, the main power input is the Power 1 connector and the backup power is
from the Power 2 connector.
3.8.1.1 Boot-up
When both power connectors are connected to the power source with over 9 V, the two
power LEDs on the front panel remain off until the ACC ON signal jumps from low to
high . The user can choose AT power mode or ATX power mode to control the system.
The following flow diagrams show the boot-up process and the LED status in AT and ATX
power modes.
Figure 3-35: ACC On: AT Mode
Figure 3-36: ACC On: ATX Mode