Iridium EDGE - Serial RS232 Interface Details

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3.1.7 Brown Out
The Iridium Edge monitors the input voltage. If the input voltage drops too low for reliable operation after
a valid input voltage is applied, the internal SBD modem’s is turned off and remains turned off until a valid
input voltage is restored.
Table 3-7 Brown out Specifications
Parameter
Value
Minimum Reset Voltage
6 V
3.1.8 Operating Power Consumption
The Iridium Edge power consumption can vary for a number of reasons:
 View of the sky which determines the quality of the signal received by the Iridium Edge
 The rate Host Controller system activates/deactivates the Iridium Edge on the SBD network
 Manufacturing and component tolerances variations
3.2 Serial RS232 Interface
The Iridium Edge uses a 3-wire RS232 interface which supports an AT command interface.
Table 3-8 Serial Interface Specifications
Parameter
Value
RS232 Rx & TX
(Absolute Maximum Voltage)
32 VDC
ESD Protection
15 kV human body model
Short to Ground Protection
Yes
Tx Low Maximum
-3.7 V
Tx High High Minimum
3.7 V
Rx Input Low Threshold
0.6V
Rx Input High Threshold
2.4 V