Instruction/ maintenance manual of the product OMG-COMM8-A Omega Engineering
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Contents I NTRODUCTION ..................................................................... 1 O VERVIEW ................................................................................. 1 W HAT ’ S I NCLUDED ........................................
A PPENDIX E - 3421 A DDENDUM .......................................... 17 A PPENDIX F - S ILK -S CREEN .................................................. 1 A PPENDIX G - C OMPLIANCE N OTICES ................................ 19 F EDERAL C OMMUNICATIONS C OMMISSION S TATEMENT .
Introduction Omega Engineering OMG-COMM8-A Page 1 Introduction Overview The Omega Engineering OMG-COMM8-A provides the PC with eight RS -232 asynchronous ports. The OMG-COMM8-A allows for connection to any device utilizing the RS -232 electrical interface, such as modems, data -entry terminals, and plotters.
Introduction Omega Engineering OMG-COMM8-A Page 2 To install the OMG-COMM8-A using factory default settings, refer to the Installation section of this manual.
Card Setup Omega Engineering OMG-COMM8-A Page 3 Card Setup The OMG-COMM8-A contains several jumper straps that must be set for proper operation. Address Selection The OMG-COMM8-A occupies 64 I/O locations and can be addressed two different ways.
Card Setup Omega Engineering OMG-COMM8-A Page 4 The following illustration shows the correlation between the DIP-switch setting and the address bits used to determine the base address. In the example below, address 280 (Factory Default) is selected as a base.
Card Setup Omega Engineering OMG-COMM8-A Page 5 IRQ Selection The OMG-COMM8-A has an interrupt selection jumper that corresponds to each port that may have to be set prior to use. The software you are using with the board will determine which interrupts, if any are to be used.
Card Setup Omega Engineering OMG-COMM8-A Page 6 Interrupt Mode Options The OMG-COMM8-A will allow each port to have an independent interrupt level or share an interrupt with another port on the adapter. The OMG-COMM8-A will even share interrupts with a compatible port that is located on another adapter.
Card Setup Omega Engineering OMG-COMM8-A Page 7 Set jumpers to “ S ” for shared interrupt mode on all blocks sharing an IRQ except one. Set that port block for “ M ”. This provides the pull-down resistor circuit that makes sharing of IRQ possible.
Installation Omega Engineering OMG-COMM8-A Page 8 Installation The OMG-COMM8-A can be installed in any of the full size PC expansion slots, but to access the “AT” or (E )ISA IRQs (10, 11, 12, 15) it must be installed in one of the 16 bit slots.
Technical Descri ption Omega Engineering OMG-COMM8-A Page 9 Technical Description The Sealevel OMG-COMM8-A provides 8 additional serial ports for terminals, modems, printers, etc. The OMG-COMM8-A utilizes the 16550 UART chip. This chip features programmable baud rate, data format, interrupt control and a 16 byte FIFO.
Technical Descri ption Omega Engineering OMG-COMM8-A Page 10 DB-25 Connector Pin Assignments Signal Name Pin # Mode GND Ground 7 TD Transmit Data 2 Output RTS Request To Send 4 Output DTR Data Termina.
Specifications Omega Engineering OMG-COMM8-A Page 11 Specifications Environmental Specifications Specification Operating Storage Temperature Range 0º to 50º C (32º to 122º F ) -20º to 70º C (-4º to 158º F) Humidity Range 10 to 90% R.H. Non -Condensing 10 to 90% R.
Appendix A - Troubleshooting Omega Engineering OMG-COMM8-A Page 12 Appendix A - Troubleshooting A Serial Utility Diskette is supplied with the Omega Engineering adapter and will be used in the troubleshooting procedures.
Appendix A - Troubleshooting Omega Engineering OMG-COMM8-A Page 13 6. The following are known I/O conflicts: • The 278 and 378 settings may conflict with your printer I/O adapter.
Appendix B - How To Get Assistance Omega Engineering OMG-COMM8-A Page 14 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.
Appendix C - Electrical Interface Omega Engineering OMG-COMM8-A Page 15 Appendix C - Electrical Interface RS -2 32 Quite possibly the most widely used communication standard is RS -232. This implementation has been defined and revised several times and is often referred to as RS -232-C/D/E or EIA/TIA -232-C/D/E.
Appendix D - Asynchronous Communications Omega Engineering OMG-COMM8-A Page 16 Appendix D - 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.
Appendix E – 3421 Addendum Omega Engineering OMG-COMM8-A Page 17 Appendix E - 3421 Addendum The OMG-COMM8-A can be equipped with a higher speed oscillator and the Startech 16C654 UART. This UART has a significantly larger FIFO (64 bytes as opposed to the 16 of the 16C554).
Appendix F - Silk-Screen Omega Engineering OMG-COMM8-A Page 18 Appendix F - Silk-Screen 4.2" 8.0" 3.9".
Appendix G - Compliance Notices Omega Engineering OMG-COMM8-A Page 19 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.
Warranty Omega Engineering OMG-COMM8-A Page 20 Warranty Omega Engineering, Inc. warrants this product to be in good working order for a period of one year from the date of purchase.
An important point after buying a device Omega Engineering OMG-COMM8-A (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Omega Engineering OMG-COMM8-A yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Omega Engineering OMG-COMM8-A - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Omega Engineering OMG-COMM8-A you will learn all the available features of the product, as well as information on its operation. The information that you get Omega Engineering OMG-COMM8-A will certainly help you make a decision on the purchase.
If you already are a holder of Omega Engineering OMG-COMM8-A, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Omega Engineering OMG-COMM8-A.
However, one of the most important roles played by the user manual is to help in solving problems with Omega Engineering OMG-COMM8-A. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Omega Engineering OMG-COMM8-A along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
