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Chapter 2: Overview
2. Overview
2.1 Introduction
The USB to Multi RS-232/422/485 Interface Converter (IC292A) provides an easy
way to connect up to four DB9 serial devices to a single USB port. All
configuration and electrical interface selections are handled through the driver, so
you don’t have to open the enclosure to set jumpers or switches. The serial port is
software configurable for RS-232, RS-422, or RS-485 (full- and half-duplex).
The IC293A software drivers and utilities make installation and operation easy for
Windows
®
98SE, ME, 2000, XP, and Windows Vista
®
operating systems. Once the
software is installed, plug the interface converter into an available USB port. Each
serial port is recognized as a standard COM port by the host system enabling
compatibility with legacy software. Serial data rates to 921.6 kbps are supported.
To prevent accidental cable disconnection, the interface converter integrates a
patent-pending high-retention locking USB port that is fully compatible with
standard USB cables. When used with the included USB cable with a high-
retention USB type B connector, the metal thumbscrew provides a secure
connection to the device. Standard operating temperature range is 32 to 158° F
(0 to 70° C) and extended temperature range is -4 to +185° F (-40° C to +85°
C). Status LEDs display electrical interface selection and serial data activity for each
port.
2.2 Features
• Each port is individually software configurable for RS-232, RS-422, and two-wire
or four-wire RS-485.
• Maintains electrical interface settings across multiple computers.
• Includes high-speed UART with 128-byte Tx FIFO and 384-byte Rx FIFO.
• Automatically enables/disables hardware RS-485.
• DB9M connector serial port supports data rates to 921.6 kbps.
• Powered by USB host connection.
• Implements full modem control signals in RS-232 mode.
• Status LEDs indicate power, electrical interface, and serial data activity for each
port.