TM S e a L IN K + 4 8 5 I U SER M AN UAL P a rt # 2 1 04 Sealevel Systems, Inc. PO Box 830 Liberty, SC 29657 USA Phone: (864) 843-4343 Fax: (864) 843-3067 www.sealevel.
Contents INTRODUCTION ........................................................................ 1 OVERVIEW......................................................................................1 WHAT’S INCLUDED ........................................................................1 INSTALLATION ......................................................................... 2 OPERATING SYSTEM INSTALLATION ...............................................2 SYSTEM INSTALLATION ........................................
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........................................................
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.
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.
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.
Installation 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.
Installation 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 menu under Programs, SeaCOM group.
Configuration Configuration Electrical Interface Selection The port on the SeaLINK+485I has the ability to be used in both half and full duplex RS-422/485 applications. This is selectable through 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, in the “ON” position, either enables, adds or connects, based on the function of the switch position listed below.
Configuration Switch Examples Please use the following examples to configure your adapter.
Technical Description Technical Description The SeaLINK+485I: utilizes a USB UART. This chip features programmable baud rate, data format, 128 byte Dual Port TX Buffer, and 384 byte Dual Port RX Buffer. The RS-422/485 transceiver supports data rates up to 921.6K baud. Features • Hot-Pluggable device • Does not require opening the case • No system resources are required (i.e.
Specifications Specifications Environmental Specifications Specification Temperature Range Humidity Range Operating 0º to 50º C (32º to 122º F) 10 to 90% R.H. Non-Condensing Storage -20º to 70º C (-4º to 158º F) 10 to 90% R.H. Non-Condensing Manufacturing • All Sealevel Systems Printed Circuit boards are built to UL 94V0 rating and are 100% electrically tested. These printed circuit boards are solder mask over bare copper or solder mask over tin nickel.
Appendix A – Troubleshooting Appendix A - Troubleshooting Serial Utility test software is supplied with the Sealevel Systems adapter and should be used in the troubleshooting procedures. Using this software and following these steps, most common problems can be eliminated. 1. If your adapter isn’t working, first check to make sure that USB support is enabled in the System BIOS and it is functioning properly in the operating system.
Appendix B – How To Get Assistance Appendix B - How To Get Assistance Please refer to Appendix A - Troubleshooting prior to calling Technical Support. 1. Read this manual thoroughly before attempting to install the adapter in your system. 2. When calling for technical assistance, please have your user manual and current adapter settings ready. If possible, please have the adapter connected in a computer ready to run diagnostic tests. 3. Please visit www.sealevel.
Appendix C - Electrical Interface Appendix C - Electrical Interface RS-422 The RS-422 specification defines the electrical characteristics of balanced voltage digital interface circuits. RS-422 is a differential interface that defines voltage levels and driver/receiver electrical specifications. On a differential interface, logic levels are defined by the difference in voltage between a pair of outputs or inputs.
Appendix C - Electrical InterfaceGround Loop Phenomenon Appendix D - Ground Loop Phenomenon What is Ground Loop? Ground loop Phenomenon occurs when two (or more) pieces of equipment are connected together with a common ground and a different ground potential exists at each location. This current can cause the connected equipment to experience noise that in turn causes data transmission errors. In extreme cases ground current can cause equipment malfunction or even destruction.
Appendix E - Asynchronous Communications Appendix E - Asynchronous Communications Serial data communications implies that individual bits of a character are transmitted consecutively to a receiver that assembles the bits back into a character. Data rate, error checking, handshaking, and character framing (start/stop bits) are pre-defined and must correspond at both the transmitting and receiving ends.
Appendix F – Silk Screen Appendix F - Silk-Screen 3.28 in 2.09 in 1.
Appendix G - Compliance Notices Appendix G - Compliance Notices Federal Communications Commission Statement FCC - This equipment has been tested and found to comply with the limits for Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
Warranty Warranty Sealevel Systems, Inc. provides a lifetime warranty for this product. Should this product fail to be in good working order at any time during this period, Sealevel Systems will, at it's option, replace or repair it at no additional charge except as set forth in the following terms. This warranty does not apply to products damaged by misuse, modifications, accident or disaster.
