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RS-422/485 SERIAL INTERFACE PLUS, 4-PORT
2. Introduction
2.1 Overview
The RS-422/485 Serial Interface Plus, 4-Port provides the PC with four
additional RS-422/485 serial ports for terminals, modems, printers, etc. The
Card is RS-485 compatible without special software or drivers. This ability is
especially useful in Windows
®
, Windows NT, and OS/2
®
environments where
the lower-level I/O control is abstracted from the application program. This
ability means that you can effectively use the Card in an RS-485 application
with existing standard RS-232 software drivers.
2.2 What’s Included
The Card is shipped with the following items. If any of these items
are missing or damaged, contact the supplier.
• RS-422/485 Serial Interface Plus, 4-Port Card
• DB37 to four DB9 “Spider Cable”
• (2) serial utility software diskettes: (1) for 32-bit Windows
®
,
(1) for DOS and Windows
®
3.1x,
• This User’s Manual
2.3 Factory-Default Settings
The factory-default settings are as follows:
Table 2-1. Factory Default Settings.
Port # Base Address IRQ Electrical Specifications
Port 1 3F8 4 RS-422
Port 2 2F8 3 RS-422
Port 3 3E8 4 RS-422
Port 4 2E8 3 RS-422