W&T 33001 User manual

USB-Isolatoren
valid for:
#33001 USB-Isolator 1kV
#33204 USB-Isolator 4kV
Release 06/2020
Manual
Installation, Startup and Application

2
© 06/2020 by Wiesemann und Theis GmbH
Subject to errors and changes:
Since we can make mistakes, none of our statements should
be used without checking. Please let us know of any mistakes
or misunderstandings you are aware of, so that we can
recognize and eliminate them quickly.
Perform work on and with W&T products only as described
here and only if you have read and understood the manual
fully. Unauthorized use can result in hazards. We are not
liable for the consequences of unauthorized use. When in doubt,
check with us or consult you dealer!

3
Content
Subject to error and alteration
Content
1. Legal notices ...................................................4
Warning notice system ..............................................................4
Qualied personnel ....................................................................5
Disposal......................................................................................5
Symbole auf dem Produkt..........................................................5
2. Safety Instructions...........................................6
Intended Use ..............................................................................6
Electrical safety..........................................................................6
EMC ............................................................................................7
3. Introduction......................................................8
4. USB Isolator, 1kV, #33001................................9
Function......................................................................................9
Supply voltage............................................................................9
Display elements......................................................................10
Speed switching.......................................................................10
Wiring example ........................................................................11
Technical data..........................................................................12
5. USB Isolator Industry, 4kV, #33204................13
Function....................................................................................13
Power supply of the insulator ..................................................13
Isolator output voltage .............................................................14
Display elements......................................................................14
Speed conguration.................................................................15
Wiring example ........................................................................16
Technical data..........................................................................17

4
Safety Instructions
1. Legal notices
Warning notice system
This manual contains notices that must be observed for your
personal safety as well as to prevent damage to equipment. The
notices are emphasized using a warning sign. Depending on the
hazard level the warning notices are shown in decreasing severity
as follows:
1DANGER
Indicates a hazard which results in death or severe injury if no
appropriate preventive actions are taken.
1WARNING
Indicates a hazard which can result in death or severe injury if no
appropriate preventive actions are taken.
1CAUTION
Indicates a hazard that can result in slight injury if no appro-priate
preventive actions are taken.
1NOTE
Indicates a hazard which can result in equipment damage if no
appropriate preventive actions are taken.
If more than one hazard level pertains, the highest level of warning
is always used. If the warning sign is used in a warning notice to
warn of personal injury, the same warning notice may have an
additional warning of equipment damage appended.

5
Safety Instructions
Subject to error and alteration
Qualied personnel
The product described in this manual may be installed and placed
in operation only by personnel who are qualied for the respective
task.
The documentation associated with the respective task must be
followed, especially the safety and warning notices contained
therein.
Qualied personnel are dened as those who are qualied by
their training and experience to recognize risks when handling the
described products and to avoid possible hazards.
Disposal
Electronic equipment may not be disposed of with normal waste,
but must be brought to a proper electrical scrap processing facility.
The complete declarations of conformity for the devices described in
this manual can be found on the respective Internet data sheet page
on the W&T homepage at http://www.wut.de
Symbols on the product
Symbol Explanation
CE-Mark
The product conforms to the requirements
of the relevant EU Directives.
WEEE-Mark
The product may not be disposed of with
normal waste, but rather in accordance
with local disposal regulations for electrical
scrap.

6
Safety Instructions
2. Safety Instructions
Intended Use
The USB isolators manufactured by Wiesemann & Theis
galvanically isolate low-speed and full-speed USB connections with
different isolation voltages. The insulators prevent compensating
currents from owing over the USB line due to potential
differences between the connected devices, which can lead to data
transmission disturbances or to the destruction of the interfaces.
For this purpose the isolators are simply inserted into the existing
USB connection.
1DANGER
The isolators described in this manual may only be used to
protect the USB interfaces. However, it is not permitted to use
the insulator to protect persons against contact with dangerous
voltages. If a safety-critical electrical isolation is required, please
contact us.
Any other use or modication of the equipment is not authorized.
Electrical safety
Please make sure there is sucient distance between upstream
and Downstream cable, to avoid direct voltage ashovers between
the cables.
The USB-Isolator may only be used in enclosed and dry areas. The
device should not be exposed to high ambient temperatures or not
operated near heat sources. Please note the restrictions regarding
the maximum ambient temperature.
The power supply unit used to supply the respective USB-Isolator
must guarantee a safe separation of the low voltage side from the
grid in accordance with EN62368-1 and have „LPS“ characteristics.

7
Safety Instructions
Subject to error and alteration
EMC
Only shielded cables may be used for connecting the Isolators.
In this case the Isolators meet the noise immunity limits for
industrial applications and the stricter emissions limits for
households and small businesses. Therefore there are no EMC-
related limitations with respect to the usability of the devices in
such environments.
The complete declarations of conformity for the devices described in
this manual can be found on the respective Internet data sheet page
on the W&T homepage at http://www.wut.de

8
Introduction
3. Introduction
USB interfaces in stationary computers unfortunately have the basic
drawback of having no galvanic isolation for the signal lines.
In many applications in the consumer world this limitation is irre-
levant, since the USB devices connected to the PC are generally
supplied through the bus and do not have any reference to a second
ground or to the ground conductor.
In the areas of measurement reading, process control or for example
medical technology, galvanic isolation of the connected devices is
mandatory in order to prevent ground loops on the USB line.
Wiesemann & Theis therefore offers USB Isolators which are descri-
bed on the following pages along with their technical specications
and wiring examples.
For up-to-date information on new developments on the Internet, go
to http://www.wut.de or the e-mail short infos available from the W&T
Interface Club, which you can sign up for at the W&T Hompage.

9
#33001
Subject to error and alteration
4. USB Isolator, 1kV, #33001
Function
The Wiesemann & Theis USB-Isolator #33001 provides galvanic
isolation for low-speed and full-speed USB connections with an
isolation voltage of at least 1000V DC. The Isolator eliminates
ground loops and prevents current from owing between the
connected devices and the supply lines of the USB caused by
potential differences. The Isolatoris simply inserted into the
existing USB connection and powered by an external power supply.
Supply voltage
The USB Isolator requires an external power supply for powering
the galvanically isolated Isolator side and a bus-powered terminal
device.
A suitable wall mount adaptor is included with the Isolator. In
principle any 5V DC power supply with a USB output can be used as
long as it provides an output current of at least 0.5A.
The supply voltage is brought to the Isolator side through a mini-
USB socket. The socket is marked on the Isolator as „Power
Connector.“ An appropriate adapter cable for connecting the power
supply is also included with the Isolator.
1NOTE
The USB A plug on the power cable must never be connected to a
second USB port on the USB host or hub which is connected to the
upstream port of the Isolator. Such a connection would jumper the
galvanic isolation and make it ineffective. A galvanically isolated
voltage source is therefore absolutely mandatory.

10
#33001
Display elements
The Isolator includes two green LEDs for indicating the correct
supply voltage for the Isolator. The Power IN LED indicates correct
power for the upstream side of the Isolator from the USB host or
hub, whereas the Power Out LED indicates the voltage of the
downstream side.
Speed switching
The USB-Isolator #33001 supports USB devices operating in full-
speed mode at 12 MBit/s or low-speed mode at 1,5 MBit/s. Two
small switches on the side of the Isolator labeled „Low Speed“ and
„Full Speed“ are used to switch between the two speeds.
Each switch congures the upstream and downstream side of the
Isolator.

11
#33001
Subject to error and alteration
1Note
A speed conversion is not possible by the Isolator, so that both
switches must always be in the same position. A different setting
for both ports will prevent data transmission.
The factory default setting for the Isolator is Full Speed mode.
Wiring example
Power adaptor 5V, 1A
min. 1kV galvanic isolation

12
#33001
Technical data
Isolation voltage: min. 1kV DC
Coupling capacitor: 10nF
USB speed: Full Speed (12MBit/s),
Low Speed (1.5 MBIt/s)
Power supply:
Upstream-Port: USB-supplied
Downstream-Port: 5V DC using included power supply
Current draw:
Upstream-Port: max. 8 mA
Downstream-Port: max. 8 mA plus
current draw of the USB slave
USB connections:
Upstream-Port: USB A plug with 20 cm cable
Downstream-Port: USB A socket integrated in housing
Ambient temperature:
Isolator: Storage: -40..+70°C,
Operating: 0..+70°C
Power supply: Storage: -40..+70°C,
Operating: 0..+40°C
Humidity: 5..90% relative humidity
(non-condensing)
Housing: Plastic compact housing,
55 x 30 x 16 mm
Weight: approx. 35 g
Scope of delivery: USB Isolator
USB power supply 5V / 1A
power cable, Mini-USB, 5-pin

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#33204
Subject to error and alteration
5. USB Isolator Industry, 4kV, #33204
Function
The Wiesemann & Theis USB-Isolator Industry #33204 galvanically
isolates low-speed and full-speed USB connections with an
isolation voltage of at least 4000V DC. The Isolator thereby
prevents unwanted current which could otherwise ow between the
connected devices over the data and supply lines of the USB. The
Isolator is simply inserted into the existing USB line.
Power supply of the insulator
The USB-Isolator #33204 is generally powered by the USB host and
supplies the connected terminal device through an integrated DC-
DC converter with power.
Only when connecting bus-powered terminal devices which draw
more than 300mA from the USB is use of an additional power
supply necessary. Power is then provided via a 5.5/2.1mm plug to
the underside of the device housing on the upstream side of the
Isolator.
This measure ensures galvanic isolation for all powering options:
the terminal device always receives its voltage through the
integrated DC-DC converter, which features an isolation voltage of
min. 6 kV.
A suitable plug-in power supply unit is included with the isolator. In
principle, however, any 5V DC power supply unit with USB output
can be used, which supplies a sucient output current and which
has the characteristics described in the safety instructions.
1NOTE
When using a 5V power supply unit with a hollow plug, its polarity
must be observed: outer contact = „+“, middle contact = „-“. Otherwi-
se the internal fuse of the isolator will be destroyed.

14
#33204
Isolator output voltage
The output voltage VBus from the W&T USB-Isolator 33204 is
brought to the galvanically isolated side of the module through a
multi-stage L-C lter.
These additional components signicantly reduce the noise
generated by the integrated DC-DC converter on the supply voltage
of the secondary-side USB.
The ltered output voltage means the Isolator is also useful for
connecting high-quality audio equipment having a USB port for
connecting to a computer.
The maximum output current of the Isolator is 1A.
Display elements
The Isolator features a pair of LEDs each for the upstream and
downstream port, located near the respective connector.
The „Power“ LED of the pair indicates correct supply voltage to the
associated Isolator port, whereas the „Full Speed“ LED indicates the
set speed of the Isolator.

15
#33204
Subject to error and alteration
Speed conguration
The USB-Isolator #33204 supports USB devices that operate in full
speed mode at 12 MBit/s or low speed at 1.5 MBit/s.
Switching between both speed is accomplished by means of
two plug-in jumpers located inside the Isolator. One jumper each
congures the upstream and downstream side of the Isolator.
If the jumper is plugged into the position labeled „Low Speed“, the
corresponding Isolator terminal runs at 1.5 MBit, whereas the port
in the other position of the jumper runs at full speed.

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#33204
Since low speed devices are uncommon, the USB Isolator model
33204 is factory set to full speed mode.
1NOTE
A speed conversion is not possible by the Isolator, so that both
jumpers must always be in the same position. A different setting for
both ports will prevent data transmission.
Wiring example

17
#33204
Subject to error and alteration
Technical data
Isolation voltage: min. 4kV DC
(both for using USB for power
and an external power supply)
Air and creepage path: > 8mm
Coupling capacitor: 4,4nF
USB speed: Full Speed (12 MBit/s),
Low Speed (1.5 MBit/s)
Power supply: generally from the USB host over
the bus or for high loads from an
external 5V power supply
Max. output current: with USB supply: 0,3 A
with enclosed power supply: 0,5 A
with suitable power supply: 1A
USB connections:
Upstream port: USB B socket
Downstream port: USB A socket
Ambient temperature: Storage: -40..+70°C
Operating: 0..+60°C
Humidity: 5..90% relative humidity
(non-condensing)
Housing: Small plastic housing,
105x75x45mm
Weight: approx. 200 g
Scope of delivery: USB Isolator Industry, 4 kV
USB cable USB-A / USB-B,
USB power supply 5V / 1A with
power cable USB-A / coax plug

Wiesemann & Theis GmbH
Porschestr. 12
D-42279 Wuppertal
Mail [e-mail]
Web www.WuT.de
Tel. [phone]
Fax [phone]