User's Manual Part 2

UPC-V312-D525 Panel PC
Page 46
Figure 3-35: ACC Off: AT Mode
Figure 3-36: ACC Off: ATX Mode
3.7.2.2 Switch to Backup Power
During operation, system power switches from Power 2 to Power 1 automatically when the
following situations occur:
 Power 2 < 10.5V and Power 1 > 9V
 Power 2 is unplugged and Power 1 > 9V
The following flow diagram shows how the power is switched between Power 2 and
Power 1 and their LED statuses.
Figure 3-37: ACC Off: Switch Between PWR1 and PWR2
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