The Addressable Input Module is a fully monitored device which permits the interfacing of third party equipment with the Fire Alarm Control panel using normally open dry contact connections. The connection to the input is monitored for a fault (open or short circuit) and Alarm conditions. The interface is used to monitor the contacts of an external system that must be interfaced to the Fire Alarm System, for example, a Flow Switch in a sprinkler system to indicate if the sprinklers have been activated or extinguishant level monitoring  in Gas Extinguishing systems, etc.