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Problem and Resolution 

 
Data communication failure 

1.

 

Make sure USB interface connection is correct. 

 

2.

 

Make sure RS-485/RS-422 output interface 

connection is correct.  

3.

 

Make sure power supply is OK. 

4.

 

Make sure the wire terminal connection is OK. 

 

5.

 

Make sure the pilot lamp flashes when receiving.  

6.

 

Make sure the pilot lamp flashes when sending. 

 

Data missing or incorrect 

Check to see whether if the data rate and format at both 

ends of the communication equipment are consistent. 

 

Содержание GM-482422

Страница 1: ...charge with a protection voltage of 600W on each line for lightning surge surge voltage or transient over voltage possibly caused by other electrical sources In this case the USB to serial converter will maintain the high speed transmission of RS 422 or RS 485 interface ensured by the tiny capacitance between the poles RS 422 and RS 485 Interfaces RS 422 and RS 485 interfaces with a DB9 male conne...

Страница 2: ...r can connect 32 RS 422 or RS 485 interface equipment Transmission Distance RS 485 422 port 1 2km 921600bps 300bps USB port No more than 5 meters Interface Protection 600W lightning strike and surge protection and 15KV ESD protection Interface form USB port A type male interface RS 485 422 port 5 pin connection pole Signal Indication 3 LED s for Power PWR Send TXD and Receive RXD Transmission medi...

Страница 3: ...Diagrams USB to RS 422 Conversion RS 422 point to point 4 wires full duplex RS 422 point to multipoint 4 wires full duplex USB to RS 485 Conversion RS 485 point to point 2 wires half duplex RS 485 point to multipoint 2 wires half duplex ...

Страница 4: ...rface connection is correct 3 Make sure power supply is OK 4 Make sure the wire terminal connection is OK 5 Make sure the pilot lamp flashes when receiving 6 Make sure the pilot lamp flashes when sending Data missing or incorrect Check to see whether if the data rate and format at both ends of the communication equipment are consistent ...

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