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External Alarm
Indicates the current state of the External Alarm register. When Active, it indicates that an Alarm event was
registered and not cleared yet. An external alarm can only be cleared by SNMP or by rebooting the unit.
Input Status
Analog Input
Displays the measured input voltage, in Volts with an precision of ±8%.
Digital Input
By convention, the digital inputs are said to be ¨high¨ when the input voltage is above a threshold value of V
Conversely, it is said to be ¨low¨ when the input voltage is below a threshold value of V
LVTTL (3.3V) levels.
For reference:
V
= 0.8 V maximum
IL
V
= 2.0 V minimum
IH
Output Status
Relay Output
Displays the current status of the relay output. Closed means the relay coil is energized and contacts are closed.
Digital Output
Displays the current status of the digital output. Low means that the open collector transistor is on and the output
is shorted to GND. Conversely, when deactivated, the transistor stops conducting and the collector is pulled high
through the internal 18.2 K pull-up resistor.
3.11.2 SMS
The Short Message Service (SMS) can be used to send a message to the Fusion as a "shoulder tap" to contact the
DeviceOutlook™ server. Also referred to as phoning home, the Fusion will then contact the DeviceOutlook server with
its identity and information necessary to reach it, and DeviceOutlook determines whether a firmware upgrade or
configuration updates are scheduled for the unit.
Figure 55 Monitor & Control — SMS
Configuration
SMS
Under normal circumstances, enable SMS to allow the device to receive shoulder tap SMS messages. Disable this
feature only if there is specific reason to do so.
Fusion Multi-Network LTE Router PN 001-0000-602 Rev. B
volts.
IH
volts. Those are defined as
IL
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