Owner's manual
Introduction
Sealevel’s SeaLINK® 2123 USB to serial interface adapter offers an easy way to
connect a DB9 serial device to a USB port. All configuration and electrical interface
selections are handled through the driver, eliminating the need 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) with the electrical interface settings
maintained locally, allowing the host computer to be repaired or upgraded without
reconfiguring the serial ports. Additionally, the 2123 can be configured at one
computer and deployed to other computers.
Sealevel SeaCOM USB software drivers and utilities make installation and
operation easy for Windows 98SE, ME, 2000, XP, and Vista operating systems.
Once the software is installed, plug the 2123 into an available USB port and the
serial port is recognized as a standard COM port by the host system enabling
compatibility with legacy software. Serial data rates to 921.6K bps are supported.
To prevent accidental cable disconnection, the 2123 integrates a patent-pending
SeaLATCH locking USB port, which is fully compatible with standard USB cables.
When used with the included USB cable with a SeaLATCH USB type B connector,
the metal thumbscrew provides a secure connection to the device. Standard
operating temperature range is 0°C to 70°C and extended temperature range (-40°C
to +85°C) is optional. Status LEDs display electrical interface selection and serial
data activity.
Features
Serial port is software configurable for RS-232, RS-422, and two-wire or four-
wire RS-485
Electrical interface settings maintained across multiple computers
High speed UART with 128-byte Tx FIFO and 384-byte Rx FIFO
Automatic hardware RS-485 enable/disable
DB9M connector – serial port supports data rates to 921.6K bps
Powered by USB host connection
Full modem control signals implemented in RS-232 mode
Status LEDs indicate power, electrical interface, and serial data activity
Flexible mounting options
DIN rail clips are available as an option
© Sealevel Systems, Inc.
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SeaLINK.SC User Manual