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Subject : 
The way to connect RS-232 to RS485 converter to control US3344I
Description : 
I am looking for a converter from RS232 to RS485 to be connected to US3344I. 
Control System (RS232) --> ATEN RS232 to RS485 --> (RS485) US3344I 
Solution : 
You could use IC485S to connect with US3344I.  Below is the pin assignment.
If you use a PC to control, you could use UC4852/UC4854 with USB port to connect the PC and use RS485 to connect US3344I. 
Related FAQ : 
RS232 Commands
US3344i-How to use PC to send RS422/485 command to US3344i?
Adding Custom RS232(HEX) command
RS232 (Serial) commands script
US3344I / the port switch behavior

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