COMM+8™ USER MANUAL Part #3420 Sealevel Systems, Inc. PO Box 830 Liberty, SC 29657 USA Telephone: (864) 843-4343 Fax: (864) 843-3067 www.sealevel.
Contents INTRODUCTION ........................................................................ 1 OVERVIEW......................................................................................1 WHAT’S INCLUDED ........................................................................1 FACTORY DEFAULT SETTINGS ........................................................1 CARD SETUP ............................................................................ 3 ADDRESS SELECTION......................................
FEDERAL COMMUNICATIONS COMMISSION STATEMENT ..............19 EMC DIRECTIVE STATEMENT ......................................................19 WARRANTY ............................................................................ 20 Figures Figure 1 - Address Selection Table ...........................................................3 Figure 2 - DIP-switch Illustration.............................................................3 Figure 3 - Headers E1 to E8 (IRQ15 selected) .................................
Introduction Introduction Overview The Sealevel Systems COMM+8 provides the PC with eight RS-232 asynchronous ports. The COMM+8 allows for connection to any device utilizing the RS-232 electrical interface, such as modems, data-entry terminals, and plotters. What’s Included The COMM+8 is shipped with the following items. If any of these items is missing or damaged, contact the supplier.
Introduction For your reference, record installed COMM+8 settings below: Port # Port 1 Port 2 Port 3 Port 4 Port 5 Port 6 Port 7 Port 8 Base Address IRQ E12 The following table illustrates the port assignments for the Factory Default setting.
Card Setup Card Setup The COMM+8 contains several jumper straps that must be set for proper operation. Address Selection The COMM+8 occupies 64 I/O locations and can be addressed two different ways. If header E11 is set to the “Switch” position the COMM+8 occupies 64 consecutive I/O locations and the DIP-switch is used to set the base address for these locations. The starting address for these 64 I/O locations must be on a 64-byte boundary i.e.: Hex 200, 240, 280, or 2C0.
Card Setup “PAL” Addressing If header E11 is set to the “PAL” position, the board can be addressed at a customized location. Using the “PAL” option will allow you to obtain COM1: - COM4: addresses, XENIX COM: addresses, or any other standard or nonstandard address configuration. Using the “PAL” feature is a very cost-effective means of solving complex addressing problems. For more information on implementing the “PAL” option, please contact Sealevel Systems Technical Support.
Card Setup Interrupt Mode Options The COMM+8 will allow each port to have an independent interrupt level or share an interrupt with another port on the adapter. The COMM+8 will even share interrupts with a compatible port that is located on another adapter. The COMM+8 can operate in three interrupt modes. Header E9 determines the interrupt mode for Ports 1-4 and header E10 determines the interrupt mode for ports 5-8. “N” indicates the (N)ormal, single interrupt per port mode.
Card Setup Set all jumpers to “S” if you are using more than one COMM+8 in a bus or you wish to completely remove the pull-down resistor for hardware compatibility. Setting the COMM+8 in this configuration when it is not accompanied by a pull-down resistor will prevent the ports from triggering an interrupt.
Card Setup DIV1 DIV4 To select the maximum data rate (460.8K bps) place the jumper in the divide by 1 (silk-screen DIV1) position. Figure 8 - Clocking Mode ‘Divide By 1’ Baud Rates and Divisors for the ‘Div1’ mode The following table shows some common data rates and the matching data rates you should choose if using the adapter in the ‘Div1’ mode. For this Data Rate 1200 bps 2400 bps 4800 bps 9600 bps 19.2K bps 57.6 K bps 115.2 K bps 230.4K bps 460.
Installation Installation Operating System Installation For Windows Users Start by choosing Install Software at the beginning of the CD. Choose Asynchronous COM: Port Software, SeaCOM. Other Operating Systems Refer to the appropriate section of the Serial Utilities Software. System Installation The COMM+8 can be installed in any 16-bit PC expansion slot. The COMM+8 contains several jumper straps for each port that must be set for proper operation prior to installing the COMM+8 into the computer. 1. 2. 3.
Technical Description Technical Description The Sealevel COMM+8 provides 8 additional serial ports for terminals, modems, printers, etc. The COMM+8 utilizes the 16554 UART chip. This chip features programmable baud rate, data format, interrupt control and a 16 byte FIFO.
Technical Description DB-25 Connector Pin Assignments (DB-25 Male) Signal GND TD RTS DTR RD CTS DSR DCD RI Name Ground Transmit Data Request To Send Data Terminal Ready Receive Data Clear To Send Data Set Ready Data Carrier Detect Ring Indicator Pin # 7 2 4 20 3 5 6 8 22 Mode Output Output Output Input Input Input Input Input Figure 9 - DB-25 Connector Pin Assignments DB-9 (EIA-574 DTE) (DB-9 Male) Signal GND TD RTS DTR RD CTS DSR DCD RI Name Ground Transmit Data Request To Send Data Terminal Ready R
Technical Description DB-78 Connector Pin Assignments (DB-78 Female) Port # TD RD RTS CTS DTR DSR DCD RI GND 1 36 37 17 16 35 18 38 15 34 2 12 11 31 32 13 30 10 33 14 3 27 28 8 7 26 9 29 6 25 4 3 2 22 23 4 21 1 24 5 5 75 76 56 55 74 57 77 54 73 6 51 50 70 71 52 69 49 72 53 7 66 67 47 46 65 48 68 45 64 8 42 41 61 62 43 60 40 63 44 Figure 11 - DB-78 Connector Pin Assignments Technical Note: Please terminate any control signals that are not going to be used.
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 Power Consumption Supply line Rating +12 VDC 110 mA -12 VDC 130 mA +5 VDC 320 mA Mean Time Between Failures (MTBF) Greater than 150,000 hours. (Calculated) Physical Dimensions Board length 7.0 inches (17.78 cm) Board Height including Goldfingers 4.
Appendix A - Troubleshooting Appendix A - Troubleshooting Serial Utility test software is supplied with the Sealevel Systems adapter and will be used in the troubleshooting procedures. By using this software and following these simple steps, most common problems can be eliminated without the need to call Technical Support. 1. Identify all I/O adapters currently installed in your system. This includes your on-board serial ports, controller cards, sound cards etc.
Appendix A - Troubleshooting 8. 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 typically reserved for COM3: 2E8-2EF is typically reserved for COM4: Always use the Sealevel Systems diagnostic software when troubleshooting a problem.
Appendix B – How To Get Assistance Appendix B - How To Get Assistance Please refer to Troubleshooting Guide prior to calling Technical Support. 1. Begin by reading through the Trouble Shooting Guide in Appendix A. If assistance is still needed please see below. 2. When calling for technical assistance, please have your user manual and current adapter settings. If possible, please have the adapter installed in a computer ready to run diagnostics. 3.
Appendix C - Electrical Interface Appendix C - Electrical Interface RS-232 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 between Data Terminal Equipment and Data CircuitTerminating Equipment Employing Serial Binary Data Interchange” The mechanical implementation of RS-232 is on a 25 pin D sub connector.
Appendix D - Asynchronous Communications 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/stop bits) are pre-defined and must correspond at both the transmitting and receiving ends.
Appendix E - Silk-Screen Appendix E - Silk-Screen 3.9" 7.0" 4.
Appendix F - Compliance Notices Appendix F - Compliance Notices Federal Communications Commission Statement FCC - This equipment has been tested and found to comply with the limits for a 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 limited lifetime warranty. 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.
