---
title: In an installation how is the Expander powered?
description: The Expander requires a 24V external PSU, with EN54-4 compliant terminals.
---

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# In an installation how is the Expander powered?

The Expander requires a 24V external PSU, with EN54-4 compliant terminals.

- [Planning Installation Questions](https://knowledgebase.hyfirewireless.com/migration/knowledge/planning-installation-questions?hsLang=en)
- [Installation Questions](https://knowledgebase.hyfirewireless.com/migration/knowledge/installation-questions?hsLang=en)

- [Default HubSpot Blog](https://blog.hyfirewireless.com/blog)

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