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Overview 

 

The interface adapter IA250 is designed 
to connect USB communication ports  
and half-duplex networks of RS485 
devices or devices (transmitters)  
with RS232 interface. The two  
IA250 interfaces are optically isolated. 

 

 

 

Declaration of Conformity 

 

The undersigned hereby declares,  
on behalf of COMECO Inc.,  
that this device has been manufactured 
in compliance with standards  
EN 61000 and EN 61010,  
and meets the requirements  
of Directives 73/23/EEC and 89/336/EEC. 

 

Vladimir Sakaliyski 

 

 

CEO  
COMECO Inc. 

 

 
 

Waste Disposal 

 

 

 

Do not dispose of  
electronic devices  
together with  
household waste 
material!

 

If disposed of within European Union,  
this product should be treated  
and recycled in accordance with the laws 
of your jurisdiction implementing 
the WEEE Directive 2002/96  
on the Waste Electrical and Electronic 
Equipment. 

 

 
 

Operating 

 

 

 

 

 

 

Driver installation 

 

Connect the adapter  
to USB PC port  
via cable K8 or an analogue.

 

 

Wait for a prompting 
to install a driver  
to appear on the PC screen.

 

 

Following the instructions  
on the screen,  
install the driver either  
from the CD provided  
or downloaded  
from www.ftdichip.com.

 

Operating with transmitters 

 

Connect the adapter  
with the transmitter 
through the proper cable  
(K1U or K2U).

 

 

Run "TraCon" v2.0 or higher 
and follow its instructions.

 

Operating in RS485 network 

 

Connect IA250 to the network 
using an appropriate cable,  
bearing in mind 
the locations of the signals  
on the RJ25 connector 
pin-outs.

 

 

To build the network,  
adhere to the sample structure 
shown on the left. 

 

Run "PolyMonitor" program  
and follow its instructions.  

 

At the start of transmission 
to RS485 network, 
the IA250 adapter 
automatically switches 
to transmission mode. 

 

 

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