> 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/deployment-resources/install-and-commission/wiring-basics/wiring-outputs.md).

# Wiring Outputs

[Compliance & Reference](broken://pages/xT7N7IT3BP4gxJvnsCrN) › [Wiring Basics](/knowledge-hub/deployment-resources/install-and-commission/wiring-basics.md) › Wiring Outputs

## This page answers

* What is an output?
* What are the voltage and current limits?
* What do I do if I need to switch a higher load?
* Do the relays provide power?

How outputs work with Gallagher hardware, and their limitations.

## 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.

## Are there limits on the outputs?

Yes. Outputs have a maximum voltage and current they can switch. This depends on the device in question, so **always refer to the install notes for the hardware in use**.

Typically the limits are:

| Limit        | Value                                                                   |
| ------------ | ----------------------------------------------------------------------- |
| Voltage      | 24 VDC/AC                                                               |
| Current load | 3 A resistive, 1 A inductive (**2 A resistive on the Plug In modules**) |

> ⚠️ **Do not** try to switch voltages higher than 24 volts (AC or DC), or a load (current draw) of over 3 amps resistive or 1 amp inductive.

## What if I need to switch loads that are higher than the limits?

If you need to switch loads that are higher than these limits, install another higher rated relay that is capable of switching those loads, and **drive that relay with the Gallagher relay**.

## Do the relays provide power?

**No.** They are essentially clean contacts.

The Plug In modules do have the means to have power supplied to the common of the relays. All other relays are electrically clean and isolated from all electronic circuits.

***

🔗 **Related**

* [Wiring Inputs](/knowledge-hub/deployment-resources/install-and-commission/wiring-basics/wiring-inputs.md). The other half of Gallagher I/O, and the resistor configurations it uses.
* [Wiring Primer](/knowledge-hub/deployment-resources/install-and-commission/wiring-basics/wiring-primer.md). Voltage, current and resistance in plain terms.
* [Input and Output (I/O) Devices](https://github.com/GGLSecDev/gitbook-spaces/tree/main/tech-support/products/cc-hardware/input-and-output-io-devices/README.md). The hardware these outputs terminate on.

*Source: SECHUB-CR-WIRING-OUTPUTS*


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