B&B Electronics UH201 Quick Start Guide

PC

(Upstream)

USB

Port Guardian

USB Device

(Downstream)

Configuration Not Required

The USB isolator is transparent to the
operating system. It does not require
configuration.

Range and Cable

You may use USB cable up to the
standard 5 meter range.

Downstream Power

The USB isolator can provide up to 400
mA of current to the attached down­stream device. But it can only do this if
the USB host port is actually providing
the specified 500 mA (Full Power) to the
isolator.

Additional USB isolation
products from B&B Electronics.

USB Speed Isolation

UH401

UH401-SL

UH401-2KV

UH401SL-2KV

Full (12 Mbps)

Low (1.5 Mbps)

Full (12 Mbps)

Low (1.5 Mbps)

4 kV

4 kV

2 kV

2 kV

Troubleshooting

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Q

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tart

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USB Power

Manufacturers don’t always adhere to the
USB specifications. You may discover that
your computer/host is not providing the full
500 mA at the upstream USB port. If your
downstream device relies upon USB power
it may not function correctly.

Here are two ways to resolve the
problem:

A powered USB isolator like B&B Electronics’
UHR401 & UHR402 will restore the full 500
mA power and provide it to connected USB
devices while simultaneously protecting them
from electrical transients.

A powered USB hub like B&B Electronics’
UHR304 will also provide 500 mA to
connected devices, while giving you
additional USB ports at the same time.

USB Range

USB has a range limitation of five meters.
You can extend the range up to 30 meters
using USB hubs. For longer ranges you can
use USB extenders.

UE204

USB to Ethernet Hub
http://www.bb-elec.com/
ue204.htm

UHR304

4-Port Powered
USB Hub
http://www.bb-elec.com/
uhr304.htm

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USB Port Guardian

Model UH201

Compact USB “key” Isolator

First Things First...

Before you begin, be sure you have
the following:

USB to USB Isolator

Document number – pn9393_R000_UH201_4312qsg

1-888-948-2248 | Europe: [phone]

www.bb-elec.com

707 Dayton Road | PO Box 1040 | Ottawa, IL 61350

Phone: [phone] | Fax: [phone]
www.bb-elec.com | E-mail: [e-mail]

© 2011 B&B Ele ctronics Manufacturing Compa ny

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