# Configure a Video Intercom as a 1-Door AC

### Before you begin

* Follow the [install guide](https://www.verkada.com/docs/?product=intercom\&contentType=setupGuide) to set up your hardware.
* Follow all the requirements in [Get Started with Verkada Intercom](https://help.verkada.com/intercom/get-started-with-verkada-intercom).

{% hint style="warning" %}
You do not need a separate door license when configuring the intercom as a 1-door controller. It is included with the intercom license.
{% endhint %}

## Hardware setup

<details>

<summary>TD33</summary>

#### Verkada reader

The second generation of Verkada Intercoms (TD33, TD53, TD63) all include a built-in reader.

#### Output wiring

The TD33 has a dry-form C relay output that you can configure as an access controller. This involves wiring the intercom to an auxiliary power controller and a lock.

![](https://3022285914-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTH6kITd3Fb5UOnnsfQ9r%2Fuploads%2Fgit-blob-1dd1a4c798fe50e6b5b61843ba5fd0981f79c9cf%2F232e12c97a3f55b4636c49c5cbb6830d10f8d238.png?alt=media)

</details>

<details>

<summary>TD53/63</summary>

#### Verkada reader

The second generation of Verkada Intercoms (TD33, TD53, TD63) all include a built-in reader.

#### Output wiring

The TD53 and TD63 have a dry-form C relay output that you can configure as an access controller. This involves wiring the intercom to an auxiliary power controller and a lock.

![](https://3022285914-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTH6kITd3Fb5UOnnsfQ9r%2Fuploads%2Fgit-blob-653476d00b7a5a3d0338efb170295d2609de9c28%2Fff56ff771f2b081b27297da477c7fa20cc0246a1.png?alt=media)

</details>

<details>

<summary>TD52</summary>

#### Verkada reader

The [Verkada TD52 Video Intercom](https://www.verkada.com/intercom/td52/) is rated to power Verkada readers at 12V and 250mA via the (**+**) and (**–**) connection.

{% hint style="info" %}
We recommend connecting the drain wire to the earth ground at the reader side.
{% endhint %}

{% hint style="warning" %}
Avoid using 12V power to power other peripheral devices, as it has latch-off current limiting.
{% endhint %}

![](https://3022285914-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTH6kITd3Fb5UOnnsfQ9r%2Fuploads%2Fgit-blob-8e69abf2819962e7678fb5a1e77b869df15686ee%2F928c732a7b42d2f89c90ba2215afaf7e4c9e4997.png?alt=media)

#### Inputs

The TD52 has 2 general-purpose dry inputs. The default input state (Normally Closed \[NC] or Normally Open \[NO]) for each can be configured in Verkada Command.

#### Connections

For each input, you should connect 1 wire to the IN pin, and the other to the GND pin. You can connect any device with a dry relay output to these ports, such as door position indicator (DPI), request to exit (REX) sensor, intercom, or access control output. All associated events are logged in Command. Learn more about how to [wire the input device](https://help.verkada.com/intercom/configuration-and-setup/wire-a-video-intercom).

#### Output

The TD52 has 1 dry form C relay output that you can configure as an access controller (AC) by connecting an access power controller to the output terminal, as detailed below.

#### Connections

You can also use the output relay as a general-purpose output.

* *For fail safe locks*, you should connect + to NC to be locked, by default.
* *For fail secure locks*, you should connect + to NO to be locked, by default.

![](https://3022285914-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTH6kITd3Fb5UOnnsfQ9r%2Fuploads%2Fgit-blob-f383aa9935aab26276dd85744450a28c9156d26b%2F931e093f5595d660b2200a77a3a3f21e4c545641.png?alt=media)

Learn more about how to [wire an output device](https://help.verkada.com/intercom/configuration-and-setup/wire-a-video-intercom).

</details>

***

## Command setup

### Add a door

{% stepper %}
{% step %}

#### In Verkada Command, go to **All Products** > **Devices** .

{% endstep %}

{% step %}

#### Select an intercom to configure.

{% endstep %}

{% step %}

#### Under **Settings** > **Door** click **Add a door.**

{% endstep %}

{% step %}

#### Click **Select** for **Directly to the Intercom**.

{% endstep %}

{% step %}

#### Select the building and floor and click **Apply.**

{% endstep %}
{% endstepper %}

{% hint style="info" %}
See [Assign a User Access to a Door](https://app.gitbook.com/s/aaHs5RfKqv9Z49mi02cC/configuration-and-setup/assign-a-user-access-to-a-door) to grant users access to the door.
{% endhint %}

***

**Need more help?** Contact [Verkada Support](https://www.verkada.com/contact/).
