Specifications

CINTERION
®
BGS12 Hardware Interface Description
Contents
33 of 109
Page
BGS12 HID_V00.915
Confidential / Released
2019
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01
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07
Figure 9: Switch off behavior
3.3.5 Automatic Shutdown
Automatic shutdown takes effect if any of the following events occurs:
•
the BGS12 board is exceeding the critical limits of overtemperature or undertemperature
(see Section 3.3.5.1)
•
undervoltage or overvoltage is detected (see Section 3.3.5.2 and Section 3.3.5.3)
The automatic shutdown procedure is equivalent to the power-down initiated with the
AT^SMSO command, i.e. BGS12 logs off from the network and the software enters a secure
state avoiding loss of data.
3.3.5.1
Thermal Shutdown
The board temperature is constantly monitored by an internal NTC resistor located on the PCB.
The values detected by the NTC resistor are measured directly on the board and therefore, are
not fully identical with the ambient temperature.
Each time the board temperature goes out of range or back to normal, BGS12 instantly
displays an alert (if enabled).
•
URCs indicating the level "1" or "-1" allow the user to take appropriate precautions, such as
protecting the module from exposure to extreme conditions. The presentation of the URCs
depends on the settings selected with the AT^SCTM write command (for details see [1]):
AT^SCTM=1: Presentation of URCs is always enabled.
AT^SCTM=0 (default): Presentation of URCs is enabled during the 15 second guard period
after start-up of BGS12. After expiry of the 15 second guard period, the presentation will
be disabled, i.e. no URCs with alert levels "1" or ''-1" will be generated.
•
URCs indicating the level "2" or "-2" are instantly followed by an orderly shutdown. The pre-
sentation of these URCs is always enabled, i.e. they will be output even though the factory
setting AT^SCTM=0 was never changed.
The maximum temperature ratings are stated in Section 5.2. Refer to Table 8 for the associated
URCs.