Automatic Shut Down - Advantech DLoG DLT-V72 Series User Manual

General Device Configuration
9.5.

Automatic shut down

Functional description
The DLT-V72 is equipped with an automatic shutdown module.
If wired up accordingly, the DLT-V72 conveniently switches off together with the vehicle's
ignition.
As disconnecting the power supply during operation can lead to data loss, the operating
system needs to be shut down normally using the appropriate hardware and software
installed on the system when the ignition is switched off.
The DLT-V72 is connected to the vehicle with three supply cables.
DC+ and DC- are directly connected to the power supply of the vehicle, the connection
is of course run through fuses. The supply voltage connected is then linked to the DLT-
V72's ignition input via a switch, for example, the key switch of the ignition (also with a
fuse).
Sequence
When the vehicle ignition is turned on or the DLT-V72 POWER button is pressed, the
DLT-V72 checks its internal temperature and runs a test to confirm that the automatic
shutdown function is working.
If this check of the environmental conditions is successful, the DLT-V72 starts the
operating system normally.
Once these checks have been successfully completed, the DLT-V72 starts the operating
system. No environmental conditions (e.g. the internal temperature of the device or the
state of the ignition input) are checked for one minute during startup.
After one minute, the DLT-V72's internal temperature and the state of the ignition input
are constantly monitored.
If the DLT-V72's internal temperature reaches a critical level, a controlled shutdown of
the operating system is carried out. The computer will remain switched off until the
temperature is once again within the permitted range.
If the ignition input is grounded or isolated during normal operation of the DLT-V72, the
device will switch to a delayed shut-off state.
The device will continue to operate normally in this state until the shut-off delay (e.g. 20
minutes) has elapsed.
If the ignition is turned on again during this shut-off delay, the DLT-V72 will revert to a
normal operational state.
Once the shut-off delay (after run time) has elapsed, the operating system will shut down
and the device will automatically shut down (e.g. after one minute or a signal from the
operating system).
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