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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 ==
This industrial USB hub expands four USB 3.2 Gen1 (5 Gbit/s) outputs via two switchable host inputs. It features multi-protection circuits, a rugged metal enclosure with mounting holes, and per-port LED indicators.

== Related products at JW Tech ==
* [https://shop.jw-tech.eu/p/WSAL23929 WSAL23929 – Industrial grade USB HUB, Extending 4x USB 3.2 Ports, Switchable dual hosts, Multi Protections]

== Technical overview ==
* Four expanded USB output ports with a maximum speed of 5 Gbit/s; two switchable inputs allow sharing USB devices between two hosts.
* Industrial-grade hub chip; the USB 2.0 interface uses MTT technology.
* Each USB port includes ESD protection against surge damage and data loss.
* Over-voltage protection prevents high-voltage power inputs from damaging connected devices.
* Multiple protection circuits: over-voltage, over-current, short circuit, over-temperature, reverse current, under-voltage lock-out, 8 kV ESD protection.
* Industrial-grade metal case with mounting holes for easy installation.
* Input: DC power jack and round-hole power port accept 7–36 V; USB input allows only 5 V.
* Maximum output current per USB port is 1.2 A; exceeding this triggers short-circuit protection – remove the device to recover.
* Operating temperature range: -10 °C to 85 °C, no condensation; the module is not waterproof.
* LED1–LED4 indicate enumeration of each USB device: when a device is connected and enumerated successfully, the corresponding LED lights up; some modules require software enablement before the LED illuminates.
* Red PWR LED indicates power supply; green LEDs identify use of the USB interfaces.
* On Raspberry Pi: insert the module into the 40-pin GPIO header, connect via a USB 3.0 adapter, and attach 5 V power to the POWER ONLY port.
* In Ubuntu on Raspberry Pi: locate the disk in the menu, select the correct disk, choose “Benchmark Partition,” start the write benchmark, and keep default settings.
* On a Windows PC: connect the USB port to the PC’s USB 3.0 port to copy files to an SSD or connect four phones simultaneously.

'''Commands and examples – verify before use:'''
<syntaxhighlight lang="text">
cd ../..
cd media/pi/xxx
sudo sh -c "sync && echo 3 > /proc/sys/vm/drop_caches"
dd if=/dev/zero of=./test_write count=2000 bs=1024k
dd if=./test_write of=/dev/null count=2000 bs=1024k
sudo apt-get update
sudo apt-get install hdparm -y
sudo hdparm -tT /dev/sda*
ls /dev/sd*
while true; do sudo hdparm -t /dev/sda2; sleep 10; done
</syntaxhighlight>

== Notes and version constraints ==
* The exact hdparm commands may vary by version; verify before running them.
* The path “media/pi/xxx” depends on the mounted drive name.
* On Raspberry Pi, the LED may only light after enabling the relevant software; this is device-specific.
* The module is not waterproof and must not be operated under condensation conditions.
* When short-circuit protection trips, the connected device must be physically removed to reset the protection.

== Source and revision record ==
* [https://www.waveshare.com/wiki/USB3.2-Gen1-HUB-2IN-4OUT USB3.2-Gen1-HUB-2IN-4OUT - Waveshare Wiki]
* Source revision: 110652
* Captured: 2026-09-04T03:35:24+00:00
* SHA-256: <code>d58e691223274889f1f54dc241901c55746791d09eb65b39cede63c4fa768bbb</code>

WSAL23929 – USB3.2-Gen1-HUB-2IN-4OUT/en - Versionsgeschichte

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