> For the complete documentation index, see [llms.txt](https://help.security.gallagher.com/smb/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/smb/installing-gallagher-smb/installing-the-hardware/connect-inputs-and-outputs/connecting-outputs.md).
# Connecting Outputs
**What is an Output?**
A physical output can be:
* Sirens
* Door control
* Control for lighting
* Warning buzzer
* Almost anything Gallagher needs to control can be an output
An output in Gallagher is (typically) a physical relay on a Gallagher device capable of interrupting or completing an electrical circuit.
**Output Relays**
Relays are provided as ‘dry’ contacts or ‘electromagnetically switched’ contacts. Each relay is rated three (3) Amps at 24 Vdc for a resistive load, or one (1) A at 24 Vdc for an inductive load.
The relay is controlled by the assigned output in the **SMB Installer Portal.**
To utilize the relay, terminate the positive constant supply to the common termination of the relay and nominate either Normally Open (N/O) or Normally Closed (N/C) termination to operate the external device. Refer to the image below.
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