SeaLevel SeaLINK+485 User manual

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© Sealevel Systems, Inc. 2102 Manual | SL9090 8/2021
SeaLINK+485
User Manual | 2102

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© Sealevel Systems, Inc. 2102 Manual | SL9090 8/2021
Contents
CONTENTS............................................................................................................................................................................................................................2
INTRODUCTION...................................................................................................................................................................................................................3
BEFORE YOU GET STARTED..............................................................................................................................................................................................4
INSTALLATION & CONFIGURATION................................................................................................................................................................................5
CONFIGURATION.................................................................................................................................................................................................................9
TECHNICAL DESCRIPTION...............................................................................................................................................................................................11
SPECIFICATIONS...............................................................................................................................................................................................................12
APPENDIX A – TROUBLESHOOTING.............................................................................................................................................................................13
APPENDIX B – HOW TO GET ASSISTANCE..................................................................................................................................................................14
APPENDIX C – ELECTRICAL INTERFACE......................................................................................................................................................................15
APPENDIX D – ASYNCHRONOUS COMMUNICATIONS.............................................................................................................................................16
APPENDIX E – COMPLIANCE NOTICES .........................................................................................................................................................................17
WARRANTY ........................................................................................................................................................................................................................18

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© Sealevel Systems, Inc. 2102 Manual | SL9090 8/2021
Introduction
Overview
The Sealevel Systems SeaLINK+485 equips the PC with 1 USB to RS-530/422/485 Asynchronous serial
port providing a versatile interface for common RS-530/422/485 needs. The advantage of this product over
more traditional approaches is that it doesn’t require opening the computer case, nor does it require
resources such as I/O ports or IRQ’s. It does require a system that supports USB both in terms of hardware
and operating system.

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© Sealevel Systems, Inc. 2102 Manual | SL9090 8/2021
Before You Get Started
What’s Included
The SeaLINK+485 is shipped with the following items. If any of these items is missing or damaged, contact
the supplier.
•SeaLINK+485 USB to RS-530/422/485 Serial I/O Adapter
•USB Cable Part Number CA179 for Connecting to Upstream Host/Hub
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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© Sealevel Systems, Inc. 2102 Manual | SL9090 8/2021
Installation & Configuration
Software Installation
Windows 98/ME/2000/XP/Vista™ Operating Systems
1. Begin by locating, selecting, and installing the correct software from the Sealevel software driver
database.
2. Select the Part Number (2102) for your device from the listing.
3. Click the ‘Install Drivers’ button.
4. The setup file will automatically detect the operating environment and install the proper
components.
To confirm that the SeaCOM driver has been successfully installed, click on the ‘Start’ button, and then
select ‘All Programs’. You should see the ‘SeaCOM’ program folder listed.
You are now ready to proceed with connecting the 2102 to your system. Refer to the Hardware
Installation section for details.
Windows NT is not USB aware and thus cannot support this
device.

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© Sealevel Systems, Inc. 2102 Manual | SL9090 8/2021
Physical Installation
The screen captures below are taken from a Windows 98 installation. Your particular operating system
may differ slightly from what is shown based on your version of windows.
The SeaLINK+485: can be connected to any Upstream Type “A” port either at the PC host or an Upstream
Hub. The SeaLINK+485 is hot-pluggable, meaning there is no need to power down your computer prior to
installation. The SeaLINK+485: requires no user hardware configuration since there are no jumpers present
on the card.
1. Connect SeaLINK+485 to an Upstream Host or Hub.
This indicates that the system has recognized the new device and will
now proceed to locate a driver.

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© Sealevel Systems, Inc. 2102 Manual | SL9090 8/2021
Since you have already installed the software by running “Setup”, simply
click “Next” to proceed. The drivers that were installed during setup will
automatically be used to configure the adapter for use.
Windows has now located a driver and installed the software. After the
driver has been located click “Finish”. You should see one more “New
Hardware Found”, indicating the actual port being created. If you view
your systems Device Manager at this point, you should have a new “COM”
port in the Port (COM & LPT) Device Class. It should look similar to the
screen shot on the following page.

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© Sealevel Systems, Inc. 2102 Manual | SL9090 8/2021
You can access your new COM: port by using the assigned COM: identifier
shown above. In this case, it is COM5: but this assignment will vary from
system to system. At this point, the hardware is recognized. To verify
operation use Sealevel Systems supplied WinSSD diagnostic utility.
WinSSD can be found in the Start, Programs group.

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© Sealevel Systems, Inc. 2102 Manual | SL9090 8/2021
Configuration
Electrical Interface Selection
The port on the SeaLINK+485 has the ability to be used as RS-530/422/485, RS-422 or 2 wire RS-485.
This is selectable via the DIP-switch SW1. The chart below describes each of the switch position’s
function. Please refer to the following page for switch setting examples. Switch SW1 ON enables, adds,
and connects. SW1 position OFF disables, removes, and disconnects.
SW1 Function
1RS-485 Two Wire Auto Enable/Disable
2Echo Enable/Disable
3Adds or removes the 120 ohm termination
4
Adds or removes the 1K ohm pull-up resistor in the RS-422/RS-485 receiver circuit
(Receive data only)
5
Adds or removes the 1K ohm pull-down resistor in the RS-422/RS-485 receiver circuit
(Receive data only)
6Connects the TX+ to RX+ for RS-485 two wire operation
7Connects the TX- to RX- for RS-485 two wire operation
8Not Used

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© Sealevel Systems, Inc. 2102 Manual | SL9090 8/2021
Switch Examples
Please use the following examples to configure your adapter.
ON
1 2 3 4 5 6 7 8
OFF
RS-530/422
OFF
ON
RS-485
1 2 3 4 5 6 7 8
OFF
ON
RS-485
1 2 3 4 5 6 7 8
OFF
Figure 1 – RS-530/422 4 Wire 485 (Default)
Figure 2 – RS-485, 2 Wire with Echo
Figure 3 – RS-485, 2 Wire No Echo