AXIOMTEK tBOX311-820-FL Series, Руководство пользователя

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tBOX311-820-FL Series User
’
s Manual
Power On Procedure
77
APPENDIX D
Power On Procedure
tBOX311-820-FL is an embedded system which is designed for vehicle,
and supports both vehicle with +12V car battery or +24V car battery.
The boot up requirement is quite different from normal embedded
system. Please do follow the instruction in this section.
1
Introduction
Most of the times, car batteries will stay at 13.5V~15V (for 12V Mode),
or at 27V~30V (for 24V Mode) while car engine is running, so specified
above 13V or 26V power on will ensure that car engine is running and
prevents a cold
crank while car engine is started.
This cold crank will cause car battery voltage to drop to minimum 6V (at
12V mode) or more low, at this time,the most difficult task to provide a
12V output power to PC system to prevent PC system from cold
boot.
In order to ensure the vehicle could provide a stable DC power,
tBOX311-820-FL will detect the DC power from source is higher than
the Start Voltage or not.