Introduction
Overview
The OMG-ULTRA-SIOprovides 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 OMG-ULTRA-SIOprovides up to 500 volts DC of isolation.
What’s Included
The OMG-ULTRA-SIOis shipped with the following items. If any of these items are missing or damaged, contact the supplier.
∙OMG-ULTRA-SIOSerial I/O Adapter (P/N 3189 with isolation or P/N 3089 without isolation)
∙Software
Factory Default Settings
The OMG-ULTRA-SIOfactory 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-SIOusing factory default settings, refer to Installation on page 9.
For your reference, record installed OMG-ULTRA-SIOsettings below: