AirLink MG90 Hardware User Guide
Rev 3 Feb.17
21
4118699
The MG90 supports an operating voltage of 7 V–36 V, but since low voltage standby
mode is enabled by default, you must supply more than 11 volts at startup.
If you want to operate the router at a lower voltage, you can change the low voltage
standby settings once the router is up and running. For more information, refer to the
MG90 Software Configuration User Guide.
Fusing
For DC installations, Sierra Wireless recommends fusing the power input using a 9 A,
fast blow fuse, recommended to have no more than ± 10% de-rating over the
operating temperature range.
DC Voltage Transients
The MG90 has built-in protection against vehicle transients including engine cranking
(down to 5.0V) and load dump, so external power conditioning circuits are not
needed. For details, see
Industry Certification for Vehicles
MG90 Power Connector
Figure 2-9: DC Power Cable Connections (Colors indicate DC cable wire colors.)
1
4
3
Pin 1 - Red
Power
Pin 2 - Black
Ground
Pin 3 - White
Ignition Sense
Pin 4 - Green
GPIO
2
For more information,
see wiring diagrams on
