Instruction Manual
  Introduction 
Sealevel Systems SeaLINK+485I Page 1 
Introduction 
Overview 
The Sealevel Systems SeaLINK+485I equips the PC with 1 isolated USB to 
RS-422/485 Asynchronous serial port providing a versatile interface for 
common RS-422/485 needs. The SeaLINK+485I connects through the PC’s 
external USB port, so it does not require opening the computer case. Resources 
such as IRQ’s and I/O addresses are also not utilized. It does require a system 
that supports USB in hardware and operating system. 
What’s Included 
The SeaLINK+485I is shipped with the following items. If any of these items is 
missing or damaged, contact the supplier. 
•  SeaLINK+485I Isolated USB to RS-422/485 Serial I/O Adapter 
•  USB Cable Part Number CA179 for Connecting to Upstream 
Host/Hub 
•  Sealevel Software 










