W&T 33001 Manuale utente

USB-Isolatoren

valid for:

#33001 USB-Isolator 1kV

#33204 USB-Isolator 4kV

Release 06/2020

Manual

Installation, Startup and Application

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!

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

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.

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.

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

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.

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

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.

#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.

#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.

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