| The Dry Contact sensor is
a simple connection to burglar alarms, fire
alarms or any application that requires monitoring
by the sensorProbe. Dry contact sensors are
user definable and can be used to detect many
different inputs such as UPS status, security
systems, air conditioning status.
These general purpose switches can be either
input or output. When used as an output it
can source up to 20 mAmps. You can select
the output voltage by setting the Output Level
to a Low or a High. When set to Low the pin
will output 0 volts. When set as a High the
pin will output 5 volts.
When used as an input a switch will retain
any error condition until it is read via SNMP.
Therefore if a switch encounters a critical
condition at any time it must report that
condition before it can return to a normal
state.
Input pins can be used to detect whether
or not an input switch is open or closed.
In combination with external sensors, input
pins can detect whether a door or window is
open or closed, if there is a water incursion
and many other conditions.
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