156 | Aprisa LTE User Manual
OPERATING VOLTAGE SETTINGS
Power supply input voltage thresholds are used to trigger LTE sleep mode to reduce power consumption.
The difference between the two thresholds Turn On and Turn Off defines the detection hysteresis.
In sleep mode, the main CPU, Ethernet, SFP, WiFi, Cellular, and serial ports are all shut down.
Minimum Turn On Input Voltage:
The LTE will not turn on when input supply voltage remains lower than this threshold. While voltage is lower
than this threshold, but higher than minimum operating voltage of the LTE, the OK led will flash once every
5 seconds. The valid values are from 10.0 V and 27.0 V but the value must always be higher than Minimum
Turn Off Input Voltage.
The default value is 10 V.
Minimum Turn Off Input Voltage:
The LTE will turn off when the input supply voltage is lower than this threshold. The valid values are from
9.5 V to 26.5 V but the value must always be lower than Minimum Turn On Input Voltage.
The default value is 9.5 V.
Note: There must also be a 0.3 V difference between the ‘Minimum Turn On Input Voltage’ and the ‘Minimum
Turn Off Input Voltage’.
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