> 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/bacnet-overview.md).
# BACnet - overview
Integrate BACnet-compatible building devices with Command Centre alarm management.
Command Centre is capable of bi-directional communication with BACnet-compatible devices and objects. Gallagher's **BACnet Protocol Interface** allows specified **Controller 6000s to act as BACnet clients**, to both read and write BACnet Object values.
* **Inbound communication.** Command Centre can monitor BACnet objects for state changes and raise alarms accordingly.
* **Outbound communication.** Command Centre allows BACnet objects to change state in response to events.
**Versions supported:** Command Centre **v8.10 through v9.40**.
## Use case
The major benefits to a site implementing the BACnet Protocol Interface are:
* Command Centre can be the central repository for all site alarms. It can monitor boiler, chiller, and air conditioning failures, maintenance alarms, and similar.
* Events received are processed by Command Centre, so they get the full event and alarm management capability of the system alongside other site alarms. That includes reporting, notifications, URL Tile, operator notes, and escalations.
* Access driven environment control translates to energy efficiency and potential cost savings. Site managers can ensure that only people with the correct access rights activate services such as lighting and air conditioning on a valid card badge, that people use the correct services (cleaners may require less lighting than other users), and that services shut down when no movement is detected.
Many sites already run a building management system as a stand-alone system for managing services. Integrating it with Command Centre provides the energy savings above, plus a centralized alarm and event management system so stakeholders are aware of alarms as they are raised.
> 🧠**Where to start**
>
> * **Planning the install?** → [BACnet - Basic Setup Requirements](/knowledge-hub/products/cc-software/configure/interface-options/facility-management-interfaces/bacnet-overview/bacnet-basic-setup-requirements.md)
> * **Checking what BACnet will not do?** → [BACnet - Limitations](/knowledge-hub/products/cc-software/configure/interface-options/facility-management-interfaces/bacnet-overview/bacnet-limitations.md)
**Documentation:** BACnet Protocol Interface Feature Overview v5. Release Note BACnet, published for each version from v8.10 through v9.40. Release Note BACnet PICS, published for each version from v8.10 through v9.40.
***
🔗 **Related**
* [Facility Management Interfaces](/knowledge-hub/products/cc-software/configure/interface-options/facility-management-interfaces.md). The other building and server-to-server interfaces: Booking Interface, Cardholder Count Outputs, Cardholder Sync, and Event Sync.
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