SeaLevel SeaLINK/PC.SC User manual

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© Sealevel Systems, Inc. 2128 Manual | SL9206 6/2021
SeaLINK/PC.SC
User Manual | 2128

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© Sealevel Systems, Inc. 2128 Manual | SL9206 6/2021
Contents
CONTENTS...........................................................................................................................................................2
BEFORE YOU GET STARTED ...............................................................................................................................4
INSTALLATION & CONFIGURATION...................................................................................................................7
HARDWARE DESCRIPTION ...............................................................................................................................15
ELECTRICAL SPECIFICATIONS.........................................................................................................................16
TECHNICAL SPECIFICATIONS..........................................................................................................................18
APPENDIX A –TROUBLESHOOTING................................................................................................................19
APPENDIX B –HOW TO GET ASSISTANCE .....................................................................................................20
APPENDIX C –ELECTRICAL INTERFACES ......................................................................................................21
APPENDIX D –ASYNCHRONOUS COMMUNICATIONS ..................................................................................22
APPENDIX E –CAD DRAWINGS - 2128............................................................................................................23
APPENDIX F - COMPLIANCE NOTICES ............................................................................................................24
WARRANTY ........................................................................................................................................................25

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© Sealevel Systems, Inc. 2128 Manual | SL9206 6/2021
Introduction
Sealevel’s SeaLINK® 2128 is a single-port embedded USB to multi-interface serial adapter intended for
mounting directly to a computer chassis, eliminating the need for an external converter, and providing a
clean, professional installation. All configuration and electrical interface selections are handled through the
driver, so you never need to open the enclosure to set jumpers or switches. The serial port is software
configurable for RS-232, RS-422, and RS-485 with the electrical interface settings maintained locally,
allowing the host computer to be repaired or upgraded without reconfiguring the serial port.
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 2128 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.
The 2128 includes a standard sized PC bracket and ships with an internal USB cable (Item# CA260) that is
compatible with many EBX and larger sized motherboards with 0.1" USB header connectors. For EPIC and
smaller sized motherboards, an internal USB cable with a 2mm header connector (Item# CA383) is
available as an option. Standard operating temperature range is 0°C to 70°C and extended temperature
range (-40°C to 85°C) is optional.
Features
•Serial port is software configurable for RS-232, RS-422, and two-wire or four-wire RS-485
•High speed UART with 128-byte Tx FIFO and 384-byte Rx FIFO
•Automatic hardware RS-485 enable/disable
•One 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
•Includes 14” internal USB header cable (Item# CA260)

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© Sealevel Systems, Inc. 2128 Manual | SL9206 6/2021
Before You Get Started
What’s Included
The SeaLINK/PC.SC is shipped with the following items. If any of these items are missing or damaged,
please contact Sealevel for replacement.
•2128 –USB to RS-232/422/485 Single Port Serial Interface Adapter
•CA260 –Internal USB Header Cable, 14” in Length
Advisory Conventions
Warning
The highest level of importance used to stress a condition where damage could result to the
product or the user could suffer serious injury.
Important
The middle level of importance used to highlight information that might not seem obvious or a
situation that could cause the product to fail.
Note
The lowest level of importance used to provide background information, additional tips, or other
non-critical facts that will not affect the use of the product.

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Optional Items
Depending upon your application, you are likely to find one or more of the following items useful. All items
can be purchased from our website (http://www.sealevel.com) or by calling our sales team at 864-843-
4343.
Cables
Internal USB Cable for 2mm Box Headers
(Item# CA383)
The CA383 cable has a 1x4 2mm Molex connector for
connecting to Sealevel embedded USB products. The
other end has a 1x4 2mm box header connector found
on very small motherboards.
Internal USB Cable for 2mm Molex Connectors
(Item# CA382)
The CA383 cable has a 1x4 2mm Molex connector for
connecting to Sealevel embedded USB products. The
other end has a 1x4 2mm Molex connector compatible
with Sealevel embedded USB hubs and other devices.
DB9F to DB25M (RS-232) Extension Cable
(Item# CA177)
The CA177 is a standard AT-style RS-232 modem cable
with a DB9F connector on one end and a DB25M
connector on the other. This cable is 72 inches in length.
DB9F to DB9M Extension Cable
(Item# CA127)
The CA127 allows users to extend a DB9 cable up to six
feet. The connectors are pinned one-to-one, so the cable
is compatible with any device or cable that has DB9
connectors.

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Terminal Blocks
Adapters and Converters
Terminal Block –DB9F to 9 Screw Terminals
(Item# TB05)
The TB05 terminal block breaks out a DB9 connector to
nine screw terminals to simplify field wiring of serial
connections including RS-422 and RS-485 networks. The
TB05 is designed to connect directly to Sealevel DB9
serial cards or any cable with a DB9M connector.
Terminal Block –Dual DB9F to 18 Screw Terminals
(Item# TB06)
The TB06 terminal block breaks out dual DB9
connectors to 18 screw terminals to simplify field wiring
of serial connections including RS-422 and RS-485
networks. The TB06 is designed to connect directly to
Sealevel dual port DB9 serial cards or any cable with
DB9M connectors.
DB9F to RJ45 Modular Adapter
(Item# RJ9S8)
The RJ9S8 is a DB9 female to RJ45 adapter. It can be
configured without tools, and it is an excellent choice for
using available infrastructure wiring.

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© Sealevel Systems, Inc. 2128 Manual | SL9206 6/2021
Installation & Configuration
SeaCOM Software Installation
Windows 98/ME/2000/XP/Vista™ Operating Systems
Do not install the Adapter in the machine until the software has been fully installed.
1. Begin by locating, selecting, and installing the correct software from the Sealevel software
driver database.
2. Select the Part Number (2128) for your device from the listing.
3. Click the ‘Download Now’ button ‘SeaCOM for Windows V3.75.’
4. The setup file will automatically detect the operating environment and install the proper
components.
LINUX INSTALLATION
Refer to Linux Archives - Sealevel. This link contains valuable information on installing your serial
adapter in the various Linux releases. Also included is a series of files explaining proper Linux syntax and
typical Linux serial implementations.
For additional software support, please call Sealevel Systems’ Technical Support, [phone]. Our
technical support is free and available from 8:00AM-5PM Eastern Time, Monday through Friday. For
email support contact: supp[email protected].
3RD PARTY SOFTWARE SUPPORT
For the most up to date information on third party software support, please visit
https://www.sealevel.com/support/3rd-party-software-support/.

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© Sealevel Systems, Inc. 2128 Manual | SL9206 6/2021
Hardware Installation
Do not connect the device to a USB port on your motherboard until the software has been
successfully installed.
The 2128 requires no user hardware configuration and can be installed in any spare PC bracket location.
To install the 2128, locate an available PC slot in your system. Remove the blank plate and install the 2128
and secure the screw or tab (included with your system). Alternately, the bracket can be removed, and the
board can be panel mounted. Connect the embedded USB cable to the board and plug into an available
USB header connector on the motherboard.
The following instructions were tested with Windows XP and may vary based on your version of Windows.
Once the device has been installed, power up the system. The Found New Hardware wizard will appear
first for the root hub and then for each port that you are installing. Follow the instructions on the following
page to finish installation.
The installation will repeat twice for each COM port (twice on single port devices). This is a
limitation in the way Windows installs USB serial devices.
1. A ‘Found New Hardware’ alert will appear above the system tray (the single port model name will
be “SeaLINK/PC.SC”).
2. The ‘Found New Hardware Wizard’ will appear.

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3. Choose ‘No, not this time’ and click ‘Next’ to proceed.
4. Choose ‘Install the software automatically’ and click ‘Next’ (the single port model name will be
“SeaLINK/PC.SC”).
5. The ‘Hardware Wizard’ will search for the proper drivers; however, it may be interrupted by a message
stating that the hardware has not passed Windows certification. Click on ‘Continue Anyway’.
All SeaCOM software and drivers have been fully tested by Sealevel. Clicking ‘Continue anyway’
will not harm your system.

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© Sealevel Systems, Inc. 2128 Manual | SL9206 6/2021
6. The appropriate drivers for your SeaLINK device and version of Windows will be installed as shown
(the single port model name will be “SeaLINK/PC.SC”).
7. Click ‘Finish’ to complete the installation of your hardware (the single port model name will be
“SeaLINK/PC.SC”).
8. The ‘Found New Hardware Wizard’ appears a second time; repeat steps 4-8.
9. When the ‘Found New Hardware’ alert informs you that your hardware is installed and ready to use,
you can proceed with verifying the installation to check functionality and/or locate the COM port
assignments, if necessary.