# Keypad Pincode Formats

All Verkada access controllers are rated to power readers at 12V up to 250mA via the + (VIN) and – (GND) connection. Verkada readers use the 4-port input (labeled as **RS-485**) while standard Wiegand readers use the 4-port inputs (labeled **wiegand**) and the shared power from the RS-485 connection. Read the steps to [connect the reader](https://help.verkada.com/access-control/hardware-installation/wire-a-door-to-a-verkada-access-controller) to an access controller.

{% hint style="warning" %}
Verkada Access Controllers accept 4-bit bursts for keypad transmission.
{% endhint %}

{% hint style="info" %}
Please set your reader transmission format according to the settings according to the manufacturer’s manual.
{% endhint %}

## Supported Keypad Transmission Formats

Verkada supports the formats outlined below. When you set up your readers to 4 bits for keypad transmission, it will vary based on your model.

**Example—**

For the **Keypad Transmission Format**, use option **9** as its Wiegand 4-bit.

![](https://134288481-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FaaHs5RfKqv9Z49mi02cC%2Fuploads%2Fgit-blob-fe0e376659e381a02fb4e7907c1a7c8db2c53053%2Fe3d668298ac5c8298ec4643fc111ee9576bacece.png?alt=media)

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