2 switch to backup power, 3 shutdown, Figure 3-29: acc on: switch between pwr1 and pwr2 – IEI Integration TANK-800-D525 v1.00 User Manual
Page 49: Figure 3-30: acc on: shutdown
TANK-800 Embedded System
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3.9.1.2 Switch to Backup Power
During the operation, the 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 3-29: ACC On: Switch Between PWR1 and PWR2
3.9.1.3 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 Power button for 6 seconds
The following flow diagram shows the system shutdown process and the LED statuses.
Figure 3-30: ACC On: Shutdown