Omega Engineering OMG-COMM8-A manual

Contents I NTRODUCTION ..................................................................... 1 O VERVIEW ................................................................................. 1 W HAT ’ S I NCLUDED ..................................................................... 1 F ACTORY D EFAULT S ETTINGS .......................................[...]

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 ............. 19 EMC D IRECTIVE 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. What’s Included The OMG-COMM8-A is shi[...]

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. For your reference, record installed OMG-COMM8-A settings below: Port # Base Address IRQ Port 1 Port 2 Port 3 Port 4 Port 5 Port 6 Port 7 Port 8 The following table shows which port is connec[...]

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. If header E1 is set to the “Switch” position the OMG- COMM8-A occupies 64 consecutive I/O locations [...]

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. ON OFF 123456 7 A12 A6 Figure 2 - DIP-switch Illustration Note: Setting the switch “On?[...]

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. The DOS serial port interface software does not use interrupts, while in[...]

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. The OMG-COMM8-A can operate in three interrup[...]

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. If you are using more than one OMG-COMM8-A or a compatible adapter in a bus you should only ha[...]

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. The OMG-COMM8-A contains several jumper straps for each port that must be set for proper operation pr[...]

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. Features • Eight RS-232 Port[...]

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 Terminal Ready 20 Output RD Receive Data 3 Input CTS Clear To Send 5 Input DSR Data Set Ready 6 Input DCD Data Carrier Detect 8 Input RI Ring Indicator 22 In[...]

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.H. Non -Condensing Manufacturing • IPC 610-A Class-III standards are adhered[...]

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. By using this diskette and following these simple steps, most common problems can be eliminated without the need to call Technica[...]

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. • 3B0 cannot be used if a Monochrome adapter is installed. • 3F8-3FF is typically reserved for COM1: • 2F8-2FF is typically reserved for COM2: • 3E8-3EF is typi[...]

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. 2. When calling for technical assistance, please have your user manual an[...]

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. It is defined as “ Interface betwe[...]

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. Data rate, error checking, handshaking, and character framing (start[...]

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). The OMG-COMM8-A equipped in this manner can be ordered as the part number [...]

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. These limits are designed to provide reasonable protection agains[...]

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. Should this product fail to be in good working order at any time during this period, Omega Engineering will, at it's option, replace or repair it at no additional [...]