Omega Vehicle Security ISA RS-422 - Manual (Page 5)

Introduction
OMG-ULTRA-SIO Page 1
Introduction
Overview
The OMG-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 t he possible destruction
of communications interfaces. The isolated OMG-ULTRA-SIO provides up to
500 volts DC of isolation.
What’s Included
The OMG-ULTRA-SIO is shipped with the following items. If any of these items
are missing or damaged, contact the supplier.
•
OMG-ULTRA-SIO Serial I/O Adapter (P/N 3189 with isolation or
P/N 3089 without isolation)
•
Software
Factory Default Settings
The OMG-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 OMG-ULTRA-SIO using factory default settings, refer to
Installation on page 9.
For your reference, record installed OMG-ULTRA-SIO settings below:
Port # Base Address IRQ Electrical Specification