Emerson Vission 20/20 Operation And Service Manual page 185

Appendix B • Vission 20/20 Application Procedures
Figure B-13. Vission 20/20 Single Board Computer with USB to RS422/RS485 Convertor
The above photo shows a typical connection for using one of the USB ports (in this case P18) for Modbus RTU
serial communications. The USB port has a USB to RS422/RS485 convertor attached to it (VPN 3485C). One side
of the convertor attaches to the USB port. The green plug of the convertor would then be connected to the RS422
or RS485 network (network wiring is not shown).
Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 2.0
(VPN3485C) on USB port P18
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