Sierra Wireless AirLink LS300 User Manual page 17

Rev 4 Apr. 13
· In ALEOS, disable the Low Power Mode. (Default setting is disabled.)
The device is on for as long as the power is on.
Note: For details on how to use ALEOS, see the ALEOS Configuration User Guide.
Pin 4
This pin is a digital input/output or an analog voltage input (green wire on DC
cable).
Pin 4:
• Monitors inputs and outputs
• Drives a relay
It has a maximum rating of 30V and 150mA sink current. The pin is user
programmed. For configuration instructions and other information on how to use
it, refer to the ALEOS Configuration User Guide.
One way to use pin 4 is with events reporting. In ALEOS you:
1. Create an Event. This triggers the device to act when it sees a specific input.
For example, you can tell the device to do something when the pin (called
digital input 1 in ALEOS) sees a digital 1. This could be when a door is
opened, activating a switch attached to it.
2. Specify an Action. These are instructions the device performs when it sees
an event. For example, an email could be sent to security, saying the door is
open, giving the time, location and other information.
There are several typical uses for Pin 4:
• As a digital input it monitors a switch, using its opening or closing to record
events or monitoring external voltages up to 30VDC. For example, you could
use it to measure the voltage on a 24VDC light bulb and have the device
react when it turns
When the switch, or input voltage is:
· Open (or at 3.3VDC to 30VDC) – It is read as a digital input=1.
· Closed (or lower than 3.3VDC) – it is read as a digital input=0.
3.3 VDC
Contact
51 K
Digital 0, 0V
Internal
Pull Up
Contact
Digital 1, 3.3V
Digital I/O
Figure 2-2: Digital Input Operation
on.
Contact
Closed
Open
Pin 4
For example:
Door opening/closing
Valve opening/closing
Ignition on/off
Tow bar up or down
Empty/Full container
Installation and Startup
Ground
17