User guide

Installation and Startup
Rev 2 Jun.13 27
It has a maximum rating of 30V and 150mA sink current. The pin is user
programmed. Configuration instructions along with other information on how to
use it is given in 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 exam-
ple, 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 of 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 on.
When the switch, or input voltage is:
· Open (2.2VDC to 30VDC) – It is read as a digital input=1
· Closed (-0.5 to 1.2VDC) – It is read as a digital input=0
Figure 2-7: Digital Input Operation
Pin 4
Digital I/O
Ground
Contact
For example:
Door opening/closing
Valve opening/closing
Ignition on/off
Tow bar up or down
Empty/Full container
Contact
Digital 1
2.2VDC to 30VDC
Open
Contact
Digital 0,
-0.5VDC to 1.2VDC
Closed
3.3 VDC
51 K
Internal
Pull Up