> For the complete documentation index, see [llms.txt](https://help.verkada.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.verkada.com/intercom/configuration/wire-a-doorbell-chime-to-an-intercom/set-up-a-4-wire-doorbell-chime-for-verkada-intercom.md).

# Set Up a 4-Wire Doorbell Chime for Verkada Intercom

Verkada intercoms include an output relay that you can use to trigger a doorbell or chime.

{% hint style="danger" %}
You need a third-party power supply to power an intercom.
{% endhint %}

{% hint style="warning" %}
This guide applies to 4 wire chimes. If you have a more traditional doorbell setup like the diagram below, see [Traditional Doorbell Wiring for Verkada Intercoms](/intercom/configuration/wire-a-doorbell-chime-to-an-intercom.md) for a detailed wiring guide.

<img src="/files/eVEKg0smwdhaSfktOxr1" alt="" data-size="original">
{% endhint %}

***

## Configure a chime output

{% stepper %}
{% step %}
**In Verkada Command, go to All Products > Intercom.**
{% endstep %}

{% step %}
**Select your intercom and click Settings.**
{% endstep %}

{% step %}
**Under I/O > Output, select Chime.**
{% endstep %}
{% endstepper %}

### Wire your intercom

4-wire bells have 2 wires dedicated to power and 2 wires dedicated to triggering the bell sound. This procedure applies to a single doorbell (or multiple doorbells) wired in parallel, as shown in the image.

{% stepper %}
{% step %}
**Remove the terminal block or pigtail from the rear of your intercom.**
{% endstep %}

{% step %}
**For each doorbell, wire bell+ and bell– to the NO and COM outputs on the intercom terminal block/pigtail, respectively.**
{% endstep %}

{% step %}
**For each doorbell, wire positive voltage and ground to the positive voltage output and ground on your power supply, respectively.**
{% endstep %}

{% step %}
**Reinsert the terminal block into the intercom.**
{% endstep %}
{% endstepper %}

***

{% hint style="warning" %}
If you have multiple doorbells, wire them in parallel.
{% endhint %}

#### TD33 Pigtail Wiring

<div align="left" data-with-frame="true"><img src="/files/7dscQG2XChoquzdeOZEu" alt=""></div>

#### TD52/53/63 Terminal Block Wiring

<div align="left" data-with-frame="true"><img src="/files/VQEgRwmaYlAAJAM9dU02" alt=""></div>


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