Impulse 3189 - Manual (Page 4)

Introduction
Sealevel Systems ULTRA-SIO Page 1
Introduction
Overview
The Sealevel Systems Ultra-SIO provides the PC with two additional ground isolated RS-422/485 (P/N 3189) or
two non-isolated RS-422/485 (P/N 3089) serial ports for terminals, modems, printers, etc. Isolation is important in
installations where the equipment being connected to the PC is either far from the PC, or on a different power
transformer circuit. Ground loop current is a commonly neglected and misunderstood phenomenon that leads to data
loss and the possible destruction of communications interfaces. The isolated Ultra-SIO provides up to 500 volts DC
of isolation.
What’s Included
The Ultra-SIO is shipped with the following items. If any of these items are missing or damaged, contact the
supplier.
• Ultra-SIO Serial I/O Adapter (P/N 3189 with isolation or P/N 3089 without isolation)
• Sealevel Software CD
Factory Default Settings
The Ultra-SIO factory default settings are as follows:
Port # Base Address IRQ Electrical Specification
Port 1 3E8 5 RS-422
Port 2 2E8 10 RS-422
To install the Ultra-SIO using factory default settings, refer to Installation on page Error! Bookmark not defined..
For your reference, record installed Ultra-SIO settings below:
Port # Base Address IRQ Electrical Specification