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4. Powering the Device
The power input (red conductor) can be supplied with +8 to +32V. The black
conductor is the signal and power ground for the device. The power/signal ground
must be connected to the same GND as the power source. This same connection is
also the ground reference for the serial interface and must be broken out (split) for
both power input and signal ground functions.
Chassis ground (white conductor and drain wire) can be tied to power/signal ground
or can remain isolated. Chassis ground is not electrically connected to anything inside
the product, other than the metal base plate and the tamper detection line.
5. Enabling the Iridium Radio
Once the device is powered it is in idle state. There will be no radio communication
until the user enables the Iridium module. A voltage of at least 1.4V must be applied
to the orange conductor to enable the radio. This line may be connected to the power
input of the device if desired.
6. Serial Communication
Once the device is powered and the radio is enabled, communication with the radio
module can occur via RS232C signaling levels. The default baud rate of the device
is 19200-N-8-1. The green conductor is the device RX (input) and the yellow
conductor is the device TX (output). The Iridium AT command set must be used for
configuration and communication.
7. Network Available Output
The Network Available digital output (blue conductor) can be monitored to verify
network availability. This output will be +3.3V when the radio can see a satellite and
0V when no network is available. This signal is current limited with an internal 10k
resistor.
