Brown Out; Operating Power Consumption; Serial Rs232 Interface - Iridium EDGE User Manual

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.
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 3-7 Brown out Specifications
Parameter
Minimum Reset Voltage
Table 3-8 Serial Interface Specifications
Parameter
RS232 Rx & TX
(Absolute Maximum Voltage)
ESD Protection
Short to Ground Protection
Tx Low Maximum
Tx High High Minimum
Rx Input Low Threshold
Rx Input High Threshold
Value
6 V
Value
32 VDC
15 kV human body model
Yes
-3.7 V
3.7 V
0.6V
2.4 V
38