SIERRA WIRELESS AirLink LX40 Enterprise LTE Router User Guide

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Installation and Startup  

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.  

LX40  

Vin*  

Internal pull-up  

resistor (10K)  

Pin 4 (power connector)  

On**  

I^Source = 1.1 mA (Typ)  

Protection  

Circuitry  

Output Off (default)**  

*Depending on the load, this value can range from Vin to Vin - 2.5 V.  

** Configurable on the ACEmanager I/O tab  

Figure 2-14: High Side Pull-up / Dry Contact Switch Input  

Table 2-5: High Side Pull-up / Dry Contact Switch Input  

Minimum Typical Maximum  

Comments  

Source Current  

0.6 mA  

1.1 mA  

= 12 V  

3.5 mA  

Maximum current the voltage output can  

provide (depends on V )  

in  

V

= 7 V  

V

V

= 36 V  

in  

in  

in  

V

V

- 2.5 V  

—

V

The voltage on Pin 4 when the high side  

out  

in  

in  

pull-up is enabled (depends on V and  

in  

power consumption)  

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. 4 January 2022  

27  

41112510  

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General	Details
Name	SIERRA WIRELESS AirLink LX40 Enterprise LTE Router User Guide
Make	SIERRA WIRELESS
Language	English
Filetype	PDF (Download)
File size	0.96 MB

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