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1. Software installation under Windows*  

Connect 

Expert Opto Bridge 0404 

to the USB port of your 

PC. Now the enclosed FTDI driver can be installed. Insert the 
CD ROM 

Drivers, Tools & Manuals

 into the CD drive of the PC 

or download the latest driver version from: 

www.gude.info/nc/support/downloads

 

Follow the screen dialogue of the installation program. A 
detailed installation guide can be found at  

www.gude.info/wiki

2. Operations under Windows*

After successfull installation of the software, the RS232 
interface will be displayed as virtual COM port. Now the 
appliance can be connected to the serial interface of 

Expert 

Opto Bridge 0404

. In addition to the data lines (receiver 

and transmitter lines), two handshake lines are supported 
in both directions (RTS/CTS). The LED on 

Expert Opto Bridge 

0404

 serves as status monitor for data transmission RxD 

and TxD. The pin configuration of the serial plug is DTE 
compliant.  

For data transmission between two identical interfaces, 
please deploy a null-modem. All functions of 

Expert Opto 

Bridge 0404 

are possible without external power supply. 

*  Windows Server 2003/2008/2012 (x32/x64),  

  

    Windows XP (x32), Vista, 7/8/10 (x32/x64)

Bedienungsanleitung / 
Manual

Expert Opto Bridge 0404

USB-/RS232-Wandler mit  
galvanischer Trennung

USB/RS232 interface transmit-
ter with galvanic isolation

                                                                

3. Support

Our Windows software contains a help file. There you 
find detailed information on features and operations of 

Expert Opto Bridge 0404

 as well as a FAQ list. Under 

www.

gude.info/nc/support/downloads

 

the latest FTDI driver is 

available for download. For further questions, please have 
a look at 

www.gude.info/wiki

 or feel free to contact our 

service team. 

4. Attributes

Features

• 

Overvoltage protection by galvanic isolation

• 

Isolation voltage max. 2500 V

• 

Serial input voltage 

 

 -15 V to -6 V for logical 1  

 

+15 V to +6 V for logical 0

• 

Data transfer rate up to 115.000 Baud

• 

Easy installation through virtual COM port

• 

In addition to the data lines (receiver and transmitter 
lines), two handshake lines are supported in both 
directions (RTS/CTS) 

• 

For Windows and Linux systems (from Kernel 2.6)

• 

LED status monitor for RxD/TxD

• 

Developed and manufactured in Germany 

Electrical Connections

• 

Serial interface RS232 (Sub-D plug, 9-pin) for device 
connection (power supply through USB interface) 

• 

Cable with USB-A plug for PC connection 

• 

USB 2.0 full speed (12 Mbit/s) 

Technical Details

• 

Plastic case, LxHxD: 77 x 24 x 42 mm

• 

Weight: ca. 55 g

• 

Cable length: ca. 40 cm

• 

Operating temperature: 0 - 50 °C 

• 

Storage temperature: -20 - 70 °C

• 

Relative humidity: 0 - 95 % (non-condensing 
environment) 

RS232 side

USB side

RxD
TxD
RTS
CTS
GND

Pin configuration of 

Expert Opto Bridge 0404

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