> For the complete documentation index, see [llms.txt](https://help.security.gallagher.com/knowledge-hub/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.security.gallagher.com/knowledge-hub/products/cc-software/configure/interface-options/facility-management-interfaces/cardholder-count-outputs.md).

# Cardholder count outputs

Control outputs from access-zone occupancy counts.

Cardholder Count Outputs turn **Outputs On and Off by Access-Zone occupancy**. An Output assigned to an Access Zone turns **On** when the cardholder count goes from 0 to 1, and **Off** when it goes from 1 to 0. This is used to tell third-party systems which zones are empty or occupied.

**Parent and child behaviour:** a parent zone's count includes all child zones. For example, take 'Building 1' (parent) with 'Room 1' (child). Entering Building 1 turns its Output On. Entering Room 1 turns Room 1's Output On, and Building 1 stays On. Building 1's Output stays On until the last cardholder leaves the site.

Supported on **v8.40 to v9.20**.

***

🔗 **Related**

* [Facility Management Interfaces](/knowledge-hub/products/cc-software/configure/interface-options/facility-management-interfaces.md). Other building-integration interfaces.


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