Sierra Wireless FX30S User Guide
Rev. 7 August 2021 30 41110485
Digital Output/Open Drain
Digital output/open drain is only available using I/O 3 on the power connector.
Figure 2-24: Digital Output/Open Drain
Note: To provide voltage on the digital output, either use the internal pull-up or add an external pull-
up.
Step 6—Check the FX30S Operation
1. On initial power up, the Power LED is red. When the processor boots up, the LED
turns amber (by default). The Power LED can be controlled by Legato applications.
If the Power LED does not turn on, ensure that the:
· Power connector is plugged in and supplying voltage of 4.75 V or greater.
· On/Off (pin 3) is connected to the battery or power source. (See Step 5—Connect
the Power and I/O on page 22 for details.)
Gateway
Protection
circuitry
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in
Off
Internal Pull-up
10 kResistor
Vcc
FX30
Internal pull-up
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Off
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VLQ
On/Off
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Output
External pull-up
Table 2-4: Digital Output / Open Drain
Pull-up State Minimum Typical Maximum Units Comments
Off Off Open Circuit — — — —
Active Low — — 0.5 V 5 mA, 5 V