Product Overview
Installation Tips
USB Power
All models are USB bus powered and
provide up to 100mA of current to
attached downstream devices when they
are attached to a full power (500 mA)
USB host port.
They comply with the USB 1.1 standard
and transfer data at 12 Mbps or 1.5 Mbps.
These data rates are preconfigured at the
factory. You should select a model that is
appropriate for your USB peripheral (low
speed or full speed).
Four models are available. Select a low
speed version, UH401SL or UH401SL-
2KV if you are using a low speed device.
Low speed devices are typically human
interface devices such as a mouse or
keyboard.
Models UH401 and UH401SL provide 4
kV isolation. UH401-2KV and UH401SL-
2KV provide 2 kV isolation.
Troubleshooting
Model #
USB Speed
Isolation
UH401
Full (12 Mbps)
4 kV
UH401SL
Low (1.5 Mbps)
4 kV
UH401SL-2KV
Low (1.5 Mbps)
2 kV
UH401-2KV
Full (12 Mbps)
2 kV
The isolator can provide up to 100 mA
of current to the attached downstream
device. But it can’t do this unless the
USB host port is actually providing the
specified 500 mA (Full Power) to the
isolator.
Upstream
Down-
stream
The USB isolator is transparent to the
operating system. It will not appear in the
device manager. Operation of the isolator
can be verified by the “power ON” LED.
This indicator illuminates when the device
is plugged in to a 500 mA port.
You may use USB cables up to the
standard 5 meter length on either the
upstream and/or downstream ports.
For optimum isolation the computer/
host and the connected device should
not use the same ground.
Connect the Isolator
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