> For the complete documentation index, see [llms.txt](https://docs.verifone.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.verifone.com/hardware-products/hardware/engage-devices/ux1-3-4xx-series/ux4xx/ux400-installation-guide.md).

# UX400 Installation Guide

This guide is the primary source of information for setting up and installing the UX400.

## Audience

This guide describes the CTLS reader's features and provides the basic information for its installation and configuration.

## Organization

This guide is organized as follows:

* [Device Overview](/hardware-products/hardware/engage-devices/ux1-3-4xx-series/ux4xx/ux400-installation-guide/device-overview.md) — Provides an overview of the reader.
* [Setup](/hardware-products/hardware/engage-devices/ux1-3-4xx-series/ux4xx/ux400-installation-guide/setup.md) — Explains setup and installation of the device, selecting a location, and establishing connections with other devices.
* [Specifications](/hardware-products/hardware/engage-devices/ux1-3-4xx-series/ux4xx/ux400-installation-guide/specifications.md) — Discusses the power requirements and dimensions of the CTLS device.
* [Maintenance and Cleaning](/hardware-products/hardware/engage-devices/ux1-3-4xx-series/ux4xx/ux400-installation-guide/maintenance-and-cleaning.md) — Explains maintenance of the CTLS device.
* [Service and Support](/hardware-products/hardware/engage-devices/ux1-3-4xx-series/ux4xx/ux400-installation-guide/service-and-support.md) — Provides information on contacting your Verifone service provider and ordering accessories or documentation.
* [Troubleshooting Guidelines](/hardware-products/hardware/engage-devices/ux1-3-4xx-series/ux4xx/ux400-installation-guide/troubleshooting-guidelines.md) — Provides troubleshooting guidelines for installation and configuration issues.

## Related Documentation

To learn more about the reader, refer to the following set of documents and their associated Verifone Part Numbers (VPNs).

| Document                                      | Verifone Part Numbers |
| --------------------------------------------- | --------------------- |
| UX400 Certifications and Regulations Sheet    | DOC159-031-EN         |
| UX400 Quick Installation Guide                | DOC159-032-EN         |
| UX300 Certifications and Regulations Sheet    | DOC159-021-EN         |
| UX300 Quick Installation Guide                | DOC159-022-EN         |
| UX300 Installation Guide                      | DOC159-023-EN         |
| UX300 Cable Retainer Quick Installation Guide | DOC159-052-EN         |

## Conventions and Acronyms

This section describes the conventions and acronyms used in this guide.

### Document Conventions

Various conventions are used to help you quickly identify special formatting. The following table describes these conventions and provides examples of their use.

| Convention | Meaning                                                                              | Example                                                         |
| ---------- | ------------------------------------------------------------------------------------ | --------------------------------------------------------------- |
| Blue       | Text in blue indicates terms that are cross referenced.                              | See Conventions and Acronyms.                                   |
| NOTE       | The pencil icon is used to highlight important information.                          | If exchanging cables use a Verifone-approved cable.             |
| CAUTION    | The caution symbol indicates possible hardware or software failure, or loss of data. | Avoid placing metallic objects at the front of the card reader. |
| WARNING    | The lightning symbol is used as a warning when bodily injury might occur.            | For safety, do not string cables or cords across a walkway.     |

### Acronym Definitions

Various acronyms are used in place of the full definition.

<table data-search="false"><thead><tr><th>Acronym</th><th>Definition</th></tr></thead><tbody><tr><td>CTLS</td><td>Contactless</td></tr><tr><td>EMV</td><td>Europay, MasterCard, and Visa</td></tr><tr><td>IC</td><td>Integrated Circuit</td></tr><tr><td>LED</td><td>Light-Emitting Diode</td></tr><tr><td>MRA</td><td>Merchandise Return Authorization</td></tr><tr><td>NFC</td><td>Near Field Communication</td></tr><tr><td>RF</td><td>Radio Frequency</td></tr><tr><td>RJ-45</td><td>Registered Jack 45 modular connector</td></tr><tr><td>Single CI</td><td>Single Contactless Interface</td></tr><tr><td>SMA</td><td>SubMiniature version A connector</td></tr><tr><td>SPI</td><td>Serial Peripheral Interface</td></tr></tbody></table>

***Document Reference: DOC159-033-EN-C, Revision C (Verifone Part Number)***


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