> For the complete documentation index, see [llms.txt](https://help.boomerang3.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.boomerang3.com/external-sensors-in-incubators/ivftech-freygen/alarm-port.md).

# Alarm port

<figure><img src="/files/UOkp2UeBXtDhlvUCJKSe" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/huNZxFrpWTdgf30gltl8" alt="" width="212"><figcaption></figcaption></figure>

The external alarm port is an isolated switch output with the maximum current rating of 1.0 A and maximum voltage of 50V AC or DC.&#x20;

The switch is closed when there is no alarm and opens when alarm condition is detected.

The switch is connected to pins 1 and 2 of the XLR socket.

Note that there is an error in the incubator manual where the picture points to pins 1 and 2 but text tells to use pins 1 and 3. The text is incorrect and shall be corrected by the producer.

<figure><img src="/files/IBRcRpLlEUnG0vtsjzh9" alt=""><figcaption></figcaption></figure>

Solder two FK002 cables to pins 1 and 2 of the XLR female plug.

## B3 settings

In B3, FK002 sensor is used to observe the alarm status. Solder the FK002 cables to pins 1 and 2 of the XLR plug.

The alarm shall be raised when an opened state is detected.


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