| 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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