Quelltext der Seite WSAL21380 – USB-HUB-2IN-4OUT/en

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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 USB-HUB-2IN-4OUT is an industrial USB hub that provides four USB 2.0 outputs and supports two inputs (dual-host). It is suitable for demanding environments thanks to a rugged metal enclosure and multiple protection circuits.

== Related products at JW Tech ==
* [https://shop.jw-tech.eu/p/WSAL21380 WSAL21380 – Industrial Grade USB HUB, Extending 4x USB 2.0 Ports, Switchable Dual Hosts]
* [https://shop.jw-tech.eu/p/WSAL21605 WSAL21605 – Industrial Grade USB HUB, Extending 4x USB 2.0 Ports, Switchable Dual Hosts]
* [https://shop.jw-tech.eu/p/WSAL23062 WSAL23062 – Industrial Grade USB HUB, Extending 4x USB 2.0 Ports, Switchable Dual Hosts]

== Technical overview ==
* Four extended USB output ports; two switchable USB inputs allow sharing USB devices between two hosts.
* Industrial-grade HUB chip inside the device.
* Each USB port has ESD protection against electrical surges and data loss.
* Over-voltage protection prevents high input voltages from damaging connected devices.
* Multiple protection circuits are integrated: over-voltage, over-current, short circuit, over-temperature, reverse current, under-voltage lock-out, 8 kV ESD protection, and filtering.
* The enclosure is made of industrial metal, is rugged, and includes mounting holes for easy installation.
* Operating temperature range: -40°C to +85°C (no condensate).
* LEDs LED1–LED4 indicate the status of each USB port: they light up when a device is connected and successfully enumerated. PWR indicates power supply.

== Notes and version constraints ==
* Exact firmware version or software compatibility is not specified; verify versions if issues occur.
* If LEDs do not light up after connecting a device, first check that the correct power adapter is used.
* Short-circuited USB devices can prevent the hub from working normally; test the device on another PC.
* If current exceeds 1.2 A, short-circuit protection activates; disconnect the device to restore it.

== Source and revision record ==
* [https://www.waveshare.com/wiki/USB-HUB-2IN-4OUT USB-HUB-2IN-4OUT - Waveshare Wiki]
* Source revision: 73950
* Captured: 2026-09-03T02:45:17+00:00
* SHA-256: <code>fcce2598f9d0b40e87f7f125f833d70308dac9f47115fefe2497d83b1f95df1f</code>