# 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 --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.accessia.com/hardware/ai-security-hub-hub-v1/inputs-and-outputs/intruder-alarm-interface.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.