1 boot-up, 2 switch to backup power, Figure 3-33: acc on: at mode – IEI Integration TANK-800-D525 v1.14 User Manual
Page 54: Figure 3-34: acc on: atx mode
TANK-800 Embedded System
Page 42
3.9.1.1 Boot-up
When both power connectors are connected to power source with over 9 V power input,
the two power LEDs on the front panel remain off until the ACC ON signal jump from
low to high
. The user can choose to use 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 3-33: ACC On: AT Mode
Figure 3-34: ACC On: ATX Mode
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.