Impulse 2104 User Manual
SeaLINK+485I
TM
USER MANUAL
Sealevel Systems, Inc. Phone: (864) 843-4343
PO Box 830 Fax: (864) 843-3067
Liberty, SC 29657 USA www.sealevel.com
M
Part # 2104
Contents
INTRODUCTION........................................................................ 1
OVERVIEW......................................................................................1
WHAT’S INCLUDED ........................................................................1
INSTALLATION......................................................................... 2
OPERATING SYSTEM INSTALLATION...............................................2
SYSTEM INSTALLATION ..................................................................2
ONFIGURATION ..................................................................... 6
C
ELECTRICAL INTERFACE SELECTION ..............................................6
SWITCH EXAMPLES.........................................................................7
TECHNICAL DESCRIPTION....................................................... 8
FEATURES....................................................................................... 8
CONNECTOR PIN ASSIGNMENTS (DB25 MALE)..............................8
SPECIFICATIONS ...................................................................... 9
ENVIRONMENTAL SPECIFICATIONS.................................................9
MANUFACTURING...........................................................................9
POWER CONSUMPTION ...................................................................9
MEAN TIME BETWEEN FAILURES (MTBF).....................................9
PHYSICAL DIMENSIONS ..................................................................9
APPENDIX A - TROUBLESHOOTING.......................................10
APPENDIX B - HOW TO GET ASSISTANCE ............................ 11
PPENDIX C - ELECTRICAL INTERFACE............................... 12
A
RS-422.........................................................................................12
RS-485.........................................................................................12
PPENDIX D - GROUND LOOP PHENOMENON ...................... 13
A
WHAT IS GROUND LOOP?.............................................................13
CABLING RECOMMENDATIONS.....................................................13
APPENDIX E - ASYNCHRONOUS COMMUNICATIONS ............ 14
A
PPENDIX F - SILK-SCREEN..................................................15
APPENDIX G - COMPLIANCE NOTICES.................................. 16
FEDERAL COMMUNICATIONS COMMISSION STATEMENT ..............16
EMC DIRECTIVE STATEMENT ......................................................16
WARRANTY............................................................................17
Figures
Figure 1- RS-422, 4 Wire RS-485 (Default).............................................7
Figure 2 - RS-485, 2 Wire with Echo........................................................7
Figure 3 - RS-485, 2 Wire No Echo..........................................................7
Figure 4 – SeaLINK+485I cabling example...........................................13
Figure 5 - Asynchronous Communications Bit Diagram .....................14
© Sealevel Systems, Inc.
SL9092 Revision 7/2006
Sealevel Systems, Incorporated. All rights reserved.
Introduction
Introduction
Overview
The Sealevel Systems SeaLINK+485I equips the PC with 1 isolated USB to
RS-422/485 Asynchronous serial port providing a versatile interface for
common RS-422/485 needs. The SeaLINK+485I connects through the PC’s
external USB port, so it does not require opening the computer case. Resources
such as IRQ’s and I/O addresses are also not utilized. It does require a system
that supports USB in hardware and operating system.
What’s Included
The SeaLINK+485I is shipped with the following items. If any of these items is
missing or damaged, contact the supplier.
• SeaLINK+485I Isolated USB to RS-422/485 Serial I/O Adapter
• USB Cable Part Number CA179 for Connecting to Upstream
Host/Hub
• Sealevel Software
Sealevel Systems SeaLINK+485I Page 1
Installation
Installation
Operating System Installation
Please note that you should install the software before the hardware.
Choose Install Software at the beginning of the CD and select the Serial I/O
software drivers and install SeaCOM.
System 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+485I can be connected to any Upstream Type “A” port either at
the PC host or an Upstream Hub. The SeaLINK+485I is hot-pluggable,
meaning there is no need to power down your computer prior to installation.
The SeaLINK+485I has an onboard 8 position dip switch that is used to
configure the interface. Prior to connecting the SeaLINK+485I, be sure to
configure this dip switch for your specific application. Please see the
Configuration section for more information. The SeaLINK+485I is defaulted to
RS-422 mode so changes are only required if you will be using the product in an
RS-485 application.
1. After installing the software connect SeaLINK+485I to an Upstream Host
or Hub.
This indicates that the system has recognized the new device and will now
proceed to locate a driver.
Sealevel Systems SeaLINK+485I Page 2
Installation
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.
Sealevel Systems SeaLINK+485I Page 3
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