SARA-G450 - System integration manual
UBX-18046432 - R08 System description Page 49 of 143
C1-Public
The entire temperature range is divided into sub-regions by limits (see Figure 20) named t
-2
, t
-1
, t
+1
and
t
+2
.
Within the first limit, (t
-1
< Ti < t
+1
), the cellular module is in the normal working range, the safe area.
In the warning area, (t
-2
< Ti < t
-1
) or (t
+1
< Ti < t
+2
), the cellular module is still inside the valid
temperature range, but the measured temperature is approaching the limit (upper or lower). The
module sends a warning to the user (through the active AT communication interface), who can
take, if possible, the necessary actions to return to a safer temperature range or simply ignore the
indication. The module is still in a valid and good working condition.
Outside the valid temperature range, (Ti < t
-2
) or (Ti > t
+2
), the device is working outside the
specified range and represents a dangerous working condition. This condition is indicated and the
device shuts down to avoid damage.
☞ The shutdown is suspended for security reasons whenever an emergency call is in progress. In this
case, the device switches off at call termination.
☞ The user can decide at any time to enable/disable the Smart Temperature Supervisor feature. If
the feature is disabled, then there is no embedded protection against disallowed temperature
conditions.
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