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Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex

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'''Documentation notice:''' This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.

== Summary ==
The Waveshare USB-HUB-4U is an industrial USB hub with four USB 2.0 ports, ESD and over-voltage protection, and LED status indicators in a rugged metal enclosure.

== Related products at JW Tech ==
* [https://shop.jw-tech.eu/p/WSAL20734 WSAL20734 – Industrial Grade USB HUB, Extending 4x USB 2.0 Ports]
* [https://shop.jw-tech.eu/p/WSAL20861 WSAL20861 – Industrial Grade USB HUB, Extending 4x USB 2.0 Ports]
* [https://shop.jw-tech.eu/p/WSAL23061 WSAL23061 – Industrial Grade USB HUB, Extending 4x USB 2.0 Ports]

== Technical overview ==
* Four USB-A output ports conforming to USB 2.0, data rate up to 480 Mbit/s.
* USB-B input for connection to a computer or SBC; plug-and-play without driver installation on supported operating systems.
* Input power via USB-B: 5 V; external DC jack for higher loads.
* Each port can supply up to 1.2 A when sufficient power is available; without an external power source over USB 2.0 only about 490 mA per port is possible.
* Protection circuits: over-voltage, over-current, short-circuit, over-temperature, reverse current, under-voltage lock-out, 8 kV ESD protection, and filtering.
* Red PWR LED indicates hub power; LED1–LED4 light when the corresponding USB port is successfully enumerated.
* Operating temperature range −40 °C to 85 °C, no condensation; the device is not waterproof.
* Industrial-grade metal enclosure with mounting holes for easy installation.
* Supported operating systems: Windows XP/7/8/8.1/10/11, macOS 8.6 or later, Linux kernel 2.4.20 or later.

== Notes and version constraints ==
* The exact geometry of the DC barrel connector (outer/inner diameter) must be verified before purchasing a replacement power adapter.
* Without an external power supply, available output current is significantly reduced; an external 5 V / ≥4 A adapter is recommended for loads exceeding 1.2 A.
* The device is not waterproof; moisture may trigger protection circuits or cause damage.
* If the input voltage is too high, the protective circuit cuts off power directly.
* If the USB LEDs do not light: first check the correct power adapter and test the peripheral directly on another PC to rule out a faulty device.

== Source and revision record ==
* [https://www.waveshare.com/wiki/USB-HUB-4U USB-HUB-4U - Waveshare Wiki]
* Source revision: 85934
* Captured: 2026-09-02T04:14:49+00:00
* SHA-256: <code>239c1088f0f1a9d253ba4d34b879acf5f113e5478799fad0edfe93506c20265b</code>

WSAL20734 – USB-HUB-4U/en - Versionsgeschichte

JWTechPublisher: Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex