# Intruder alarm interface

* The intruder alarm interface has two inputs and one dry output
* The inputs can only be connected to isolated switch (or relay) contacts. Do not connect them to a power supply. A loop resistance greater than 500 kOhms will be interpreted as Open and a loop resistance less than 500 Ohms will be interpreted as Closed
* Use a shielded cable and connect the shield to earth using the labeled earth post inside the enclosure
* The dry output is implemented using a single-pole-double-throw relay and is electrically isolated from the rest of the system. The dry output is rated to switch a maximum of 5A and 30 VDC
* You can configure the interface in Accessia Installer app
* For buildings that include an intruder alarm supporting this feature, the Hub output **AUX 3 OUT** can be used to toggle the state of the intruder alarm (set or unset)
* The **AUX 3 IN** input should be driven by the intruder alarm to indicate its current state (set or unset)
* The **AUX 4 IN** input should be connected to a set-request push button on the inside of the exit door
* When the alarm is set and an authorized user presents their credentials at the entrance door, the alarm is automatically unset
* When an authorized user exits the building and presses the set-request button, the alarm is automatically set as soon as the exit door closes behind them