User manual

TREK-775/TREK-776 User Manual 38

4.5 Jumper Setting on Power-Board

4.5.1 Low battery monitor and shut down (CN2)

The low battery monitor is an optional shut down function designed to

prevent the DC vehicle battery power from running out. When the battery

voltage drops below a certain level (11V for DC12V battery, and 22V for

DC24V battery) the OS will be terminated after 30 seconds and the sys-

tem power will shut down after one minute.

The default setting reserves all pins open to disable the shut down func-

tion. However, DC24V battery protection can be activated by closing

pins 3 - 4, or changed to DC12V battery protection by closing pins 1 - 2.

4.5.2 Power off delay setting connector (CN7)

This connector determines the delay time when the power turns off and

provides two kinds of settings; shut down at 0 seconds, or 30 seconds

after the power turns off. To change the delay time, Advantech accepts

OEM design requests. The standard setting is shown below:

The power off delay function should be available when power support

ignition input control, described as below section.

Table 4.10: Low battery monitor (CN2)

No battery

protection (default)

DC12V battery

protection

DC24V battery

protection

Table 4.11: Power off delay setting connector (CN7)

Default (0 second) Option (30 seconds)