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USB to 

RS-232/485/422 

Interface Converter

User manual

RND 405-0000

2

www.rnd-electronics.com

CAUTION: Read the instructions before using the 

device

Summary of Contents for 405-00002

Page 1: ...USB to RS 232 485 422 Interface Converter User manual RND 405 00002 www rnd electronics com CAUTION Read the instructions before using the device...

Page 2: ...g 4 communication methods Point to point four wire full duplex Point to multi point four wire full duplex Point to point two wire half duplex Point to multi point two wire half duplex When the convert...

Page 3: ...RS 485 interface devices Transmission distance RS 232 end no more than 5 meters USB end no more than 5 meters RS 485 422 end no more than 1200meters 9600bps when USB end no more than 5 meters Interfa...

Page 4: ...ication connection diagram When the mode is RS 232 DB9 Male PIN Output Signal RS 422 full duplex wiring RS 485 half duplex wiring 1 T R Transmitting A RS 485 A 2 T R Transmitting B RS 485 B 3 RXD Rece...

Page 5: ...5 EN EN When the mode is RS 485 422...

Page 6: ...ing F Check whether the transmitting indicator flashes when sending 2 Data loss or error A Check whether the data rate and format are consistent at both ends of the data communication equipment 8 Step...

Page 7: ...elect Update Driver Software In the pop up window select Browse Computer to find the driver software According to their own computer system select the appropriate driver software path the following ch...

Page 8: ...th a successful installation click close to use Windows10 system access may show a driver you need to update to a dedicated driver update the same way as the above installation 9 2 One click installat...

Page 9: ...d keep clicking Next to complete Mode change and configuration default is RS 232 mode As shown in the figure right click on the serial device and select Properties click Port Setting to change the mod...

Page 10: ...10 EN EN 2 RS 485 mode 3 RS 422 mode...

Page 11: ...11 EN EN 4 Serial port number configuration...

Page 12: ...www rnd electronics com...

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