User's Manual Part 2

UPC-V312-D525 Panel PC
Page 44
3.7.1.2 Switch to Backup Power
During operation, system power will switch from Power 1 to Power 2 automatically when
the following situations occur:
 Power 1 < 9V and Power 2 > 10.5V
 Power 1 > 9V, but the ACC ON signal jump from high to low
 Power 1 is unplugged and Power 2 > 10.5V
The following flow diagram shows how the power is switched between Power 1 and
Power 2 and their LED statuses.
Figure 3-33: ACC On: Switch Between PWR1 and PWR2
3.7.1.3 Shutdown
The system will shutdown in the following situations:
 Power 1 < 9V and Power 2 < 10.5V
 Power 1 > 9V, Power 2 < 10.5V and ACC ON signal jump from high to low
 Press
buttons for 6 seconds
The following flow diagram shows the system shutdown process and the LED statuses.
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