Itronix T5200 User Manual page 40

To conserve battery power, the computer automatically suspends
operation after two minutes of continuous idle time. You can
change this time by selecting the Power Off tab and then selecting a
different time from the list. The system will not suspend while
connected to external power, and if suspended will automatically
turn on when connected to external power.
For important information about batteries and power, see Section 5,
"Power Management."