2 switch to backup power, Figure 3-39: acc off: at mode, Figure 3-40: acc off: atx mode – IEI Integration UPC-V312-D525 v1.10 User Manual

Page 61: Figure 3-41: acc off: switch between pwr1 and pwr2

UPC-V312-D525 Panel PC

Page 48

Figure 3-39: ACC Off: AT Mode

Figure 3-40: ACC Off: ATX Mode

3.8.2.2 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 3-41: ACC Off: Switch Between PWR1 and PWR2