Dry Contact Sensors
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.
Specifications & Features:
Measurement range - Alarm or Normal
Communications cable - RJ-45 jack to sensor using UTP Cat 5 wire.
Sensor type - open/closed contact switch
Input voltage range. 0 to 5 volts
Normal input voltage is settable under software
Normally open, normally closed is settable under software
Current Range. Can sink up to 20 mAmps
Power source: powered by the sensorProbe. No additional power needed
sensorProbe autodetects the presence of the dry contact sensor
Measurement rate - multiple readings every second
Up to 2 dry contact sensors per sensorProbe2, 8 per sensorProbe8 and cameraProbe8
Full autosense including disconnect alarm
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