Sierra Wireless AirLink LX40 Hardware User's Manual page 27

High Side Pull-up / Dry Contact Switch Input
You can use the green wire to connect Pin 4 to a dry contact switch. The dry contact
switch is not available in Standby mode.
Pin 4 (power connector)
Figure 2-14: High Side Pull-up / Dry Contact Switch Input
Table 2-5: High Side Pull-up / Dry Contact Switch Input
Source Current
V
out
Analog Input
You can connect Pin 4 on the power connector to an analog sensor. As an analog input
(voltage sensing pin), the router monitors voltage changes in small increments. This
allows you to monitor equipment that reports status as an analog voltage.
The pin detects inputs of 0.5–5 V or 0.5–10 V referenced to ground. When used with a
sensor to transform values into voltages, the pin can monitor measurements such as
temperatures, sensors, or input voltage.
Using ACEmanager, you can select the range of voltage to be monitored to be
0–5 V or 0–10 V. For low input voltages, 0–5 V provides better accuracy.
Rev. 2 January 2021
*
Depending on the load, this value can range from Vin to Vin - 2.5 V.
** Configurable on the ACEmanager I/O tab
Minimum Typical
0.6 mA 1.1 mA
V = 7 V V = 12 V
in in
V - 2.5 V —
in
LX40
V *
in
Internal pull-up
resistor (10K)
On**
I = 1.1 mA (Typ)
Source
Protection
Circuitry
Output Off (default)**
Maximum
3.5 mA Maximum current the voltage output can
provide (depends on V
V = 36 V
in
V The voltage on Pin 4 when the high side
in
pull-up is enabled (depends on V
power consumption)
27
Installation and Startup
Comments
)
in
and
in
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