AirLink LX40 Series Hardware User Guide
Rev. 2 January 2021
30
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Digital Output/Open Drain
Digital output/open drain, used to drive an external digital input, for example, is available
using Pin 4 on the power connector.
Figure 2-18: Digital Output/Open Drain
Step 7—Check the Router Operation
1.
When power is supplied to the AirLink LX40 router, it powers up automatically, as
indicated by the flashing LEDs. If it does not turn on, ensure that the:
·
Power connector is plugged in and supplying voltage greater than 9 VDC.
Note: Although the LX40 operates in the range 7–36 VDC, low voltage standby mode is
enabled by default. In order to avoid the router powering on in standby mode, ensure that it is
supplied with more than 9 VDC at startup. (You can change the low voltage standby mode
settings once the router is operational. If the Power LED is red, the router is in standby mode.)
·
On/Off control (pin 3) is connected to the battery or power source (see
on page 19 for details).
LX40
V
in
V
cc
External Pull-Up
Resistor
Internal pull-up
resistor
Off
Protection
Circuitry
Pin 4 (power connector)
On/Off
Table 2-8: Digital Output / Open Drain
Pull-up
State
Minimum
Typical
Maximum
Comments
Off
Off
Open Circuit
—
—
—
Active Low
—
—
0.5 V
5 mA,
5 V