W&T Electronics 34201, 34211, 38211, 38001, 36201 Manual Handbook

W&T

Manual

USB-Interfaces

Release 1.7
Model 34201, 34211

36201
38201, 38211
38001, 38011

40

W&T USB Interfaces

© 08/2009 by Wiesemann & Theis GmbH

Microsoft, MS-DOS and Windows are registered trademarks of
the Microsoft Corporation

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!

41

W&T

Subject to error and alteration

USB Interfaces

Wiesemann & Theis offers an entire family of USB interface
converters which are described on the following pages along
with their technical specifications 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 Homepage.

42

W&T USB Interfaces

Contents

Installation and Driver Software ............................................ 43

USB Interface Converter with USB power supply:

USB <> RS232 Interface Cable , #38001 ................................45

USB <> RS232 Interface Cable , #38011 ................................49

USB <> 20mA Interface, #34211 .......................................... 53

USB <> RS232/RS422/RS485 Interface, #38211 ....................57

USB Interface Converter with 24V power supply:

USB <> 20mA Interface, #34201 .......................................... 63

USB <> RS422/RS485 Interface, #36201 ............................... 67

USB <> RS232 Interface, #38201 .......................................... 73

43

W&T

Subject to error and alteration

USB Interfaces

Installation and Driver Software

Startup of USB devices has become a trouble-free procedure
thanks to automatic detection of newly connected hardware
offered in modern operating systems and by the mostly
automated process of driver installation.

Installing the hardware

The Interface is connected to the free USB port on a computer,
a USB hub or a USB device having hub functions using the
included USB cable.

In addition, the not USB powered Interfaces 34201, 36201 and
38201 must be connected to an external voltage source, since
the USB cannot itself provide the voltage of 12...24V required
to operate these interfaces.

The hot-plugging capability of USB makes it possible to
connect the Interface to the bus or unplug it again at any time.

Housing

The W&T USB Industry Interfaces are contained in a plastic
housing for mounting on standard rails according to EN 50022-

35.

To configure the RS485 / RS422 Interfaces, the enclosure must
be opened to set the mode type/termination DIL switches on
the interface module.

For this purpose we recommend threading a SUB-D connector
with connector body onto the Interface and use the threaded­on connector to assist in removing the housing cover from the
housing body.

1

44

W&T USB Interfaces

Driver software

With the exception of Linux, the serial USB interfaces can be
accessed under the various operating systems only by using
special drivers. These drivers are in a constant state of develop­ment with respect to their technical features as well as the
number and type of compatible operating systems.

For this reason, W&T makes the current drivers and software
installation guides available on the datasheet pages of our Web
site at http://www.wut.de.

The driver installs on Windows 98, Me, 2000, XP, 2003 and
Vista systems virtual COM Ports through which the serial ports
of the Interfaces can be accessed.

Detailed information about installation and configuration of the
drivers under the various operating systems is found on the
enclosed W&T Product CD.

For reasons of compatibility between the W&T USB
Interface convertors and current drivers which the new
Windows versions provide, as well as with Linux and
Apple OS X systems, all Interfaces carry the uniform
product ID 0x6001 effective immediately.

This means that older drivers which require product ID
0xCB68 for Interface models 38011 and 38211 will no
longer be used.

Of course you can also find the required Windows
drivers on the current product CD which is included
with each W&T USB Interface.

Older model 38011 and 38211 Interfaces can be
updated using a small tool. The tool can be found along
with a description of how to use it on the W&T home­page on the datasheet page for the respective
Interface.

1

45

W&T

Subject to error and alteration

USB Interfaces

USB <> RS232 Interface Cable, #38001

The 38001 Interface Cable allows bi-directional connection of
RS232 devices to computers having an USB port.

The Interface supports all signals present on the 9-pin RS232
port. The converter is contained in a 9-pin SUB-D plastic
housing.

Power supply

The interface cable does not require an additional external
power supply, but rather receives its power through the USB.
The current consumption is approx. 60mA.

ESD protection

All RS232 signal lines are protected against static discharge up
to a voltage of 15kV according to IEC 801-2, Level 4.

46

W&T USB Interfaces

Wiring configuration

The USB connection is implemented as a USB Type A male
connector with 2m of cable, and the RS232 connection as a DB9
DTE male connector. The pin assignments for the connector
can be found in the following table:

Pin# Function Direction

1 DCD input

2 RxD input

3 TxD output

4 DTR output

5 GND GND

6 DSR input

7 RTS output

8 CTS input

9 RI input

47

W&T

Subject to error and alteration

USB Interfaces

Wiring examples

RS232 wiring example with hardware handshake

RS232 wiring example with software handshake

DB25 male DTEDB9 male DTE

TxD

RxD

GND

RTS

CTS

DSR

DCD

DTR

RI

PC

3

2

7

5

4

20

8

6

RxD

TxD

GND

CTS

RTS

DTR

DCD

DSR

38001

3

2

5

7

8

6

1

4

9

USB USB

DTE Device

2

3

7

4

5

6

8

20

22

DB9 male DTE DB25 male DCE

TxD

RxD

GND

RTS

CTS

DSR

DCD

DTR

RI

TxD

RxD

GND

PC

DCE Device

2

3

7

38001

3

2

5

7

8

6

1

4

9

USB USB

DB9 male DTE

DB25 male DTE

TxD

RxD

GND

RTS

CTS

DSR

DCD

DTR

RI

RxD

TxD

GND

PC

DTE Device

3

2

7

38001

3

2

5

7

8

6

1

4

9

USB USB

DB9 male DTE DB25 female DCE

TxD

RxD

GND

RTS

CTS

DSR

DCD

DTR

RI

TxD

RxD

GND

RTS

CTS

DSR

DCD

DTR

RI

PC

DCE Device

38001

3

2

5

7

8

6

1

4

9

USB USB

48

W&T USB Interfaces

Technical Data

Standard baud rates: 300..115.200 baud
Settable baud rates: Depending on the application and

operating system, up to 1 MBaud

Baud rate: 3 MHz/n , n = 3..16383
Data bits: 7 or 8
Stop bits: 1 or 2
Parity: no, even, odd, mark, space
Supported signals: RxD, TxD, RTS, CTS,

DSR, DCD, DTR, RI
Galvanic isolation: none
ESD rating: up to 15kV per IEC 801-2, Level 4
Supply voltage: 5V DC via USB
Operating current draw: approx. 60mA
USB connector: 2m cable with USB type A plug
RS232 connector: 9-pin SUB-D plug with DTE pinout
Ambient temperature: Storage: -40..+70°C

Operating: 0..+60°C
Housing / Dimensions: 9-pin plastic SUB-D housing

50 x 33 x 15 mm
Weight: 150g
Included: USB <> RS232 Interface Cable

Product CD with driver software

49

W&T

Subject to error and alteration

USB Interfaces

USB <> RS232 Interface Cable 2, #38011

The 38011 Interface Cable 2 allows bi-directional connection
of RS232 devices to computers having an USB port.

The Interface supports all signals present on the 9-pin RS232
port. The converter is contained in a 9-pin SUB-D plastic
housing.

Power supply

The interface cable does not require an additional external
power supply, but rather receives its power through the USB.
The current consumption is approx. 20mA.

ESD protection

All RS232 signal lines are protected against static discharge up
to a voltage of 15kV according to IEC 801-2, Level 4.

50

W&T USB Interfaces

Wiring configuration

The USB connection is implemented as a USB Type A male
connector with 2m of cable, and the RS232 connection as a DB9
DTE male connector. The pin assignments for the connector
can be found in the following table:

Pin# Function Direction

1 DCD input

2 RxD input

3 TxD output

4 DTR output

5 GND GND

6 DSR input

7 RTS output

8 CTS input

9 RI input