ISO COMM2.PCI USER MANUAL TM Part # 7203 Sealevel Systems, Inc P.O. 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 FACTORY DEFAULT SETTINGS ........................................................1 CARD SETUP ............................................................................ 2 ELECTRICAL INTERFACE SELECTION .......................
APPENDIX E - ASYNCHRONOUS COMMUNICATIONS ............ 15 APPENDIX F - SILK-SCREEN ................................................. 16 APPENDIX G - COMPLIANCE NOTICES ................................. 17 FEDERAL COMMUNICATIONS COMMISSION STATEMENT...............17 EMC DIRECTIVE STATEMENT ......................................................17 WARRANTY ............................................................................ 18 Figures Figure 1- RS-232 ..................................................
Introduction Introduction Overview The Sealevel Systems ULTRA COMM+2I.PCI is a two channel isolated PCI Bus serial I/O adapter for the PC and compatibles. Utilizing the Exar 16C850 UART with its industry leading 128 byte FIFOs, it provides two field selectable RS-232/422/485 serial ports supporting data rates up to 460.8K bps (RS-422/485). Configure both ports as RS-232 for standard serial COM: port requirements. Choose the RS-422 mode for long distance device connections up to 5000ft.
Card Setup Card Setup Electrical Interface Selection Each port on the ULTRA COMM+2I.PCI has the ability to be used as RS-232, RS-422 or RS-485. This is selectable via two DIP-switches, SW1 & SW2. Please use the following examples to configure your adapter.
Card Setup 2-Wire RS-485 NO Echo ON OFF 1 2 3 4 5 6 7 8 9 10 1 2 3 T P P L L E Figure 5 - RS-485, 2-wire without Echo Line Termination Typically, each end of the RS-485 bus must have line-terminating resistors (RS-422 terminates at the receive end only). A 120-ohm resistor is across each RS-422/485 input in addition to a 1K-ohm pull-up/pull-down combination that biases the receiver inputs. Switches SW1 and SW2 allow the user to customize this interface to their specific requirements.
Card Setup RS-485 Enable Modes RS-485 is ideal for multi-drop or network environments. RS-485 requires a tri-state driver that will allow the electrical presence of the driver to be removed from the line. The driver is in a tri-state or high impedance condition when this occurs. Only one driver may be active at a time and the other driver(s) must be tri-stated. The output modem control signal Request To Send (RTS) is typically used to control the state of the driver.
Card Setup Clock Modes The ULTRA COMM+2I.PCI employs a unique clocking option that allows the end user to select from divide by 4 and divide by 1 clocking modes. These modes are selected at switches SW3 & SW4. To select the Baud rates commonly associated with COM: ports (i.e. 2400, 4800, 9600, 19.2, … 115.2K Bps) set switch position 2 to the ‘On’ position (silk-screen D4). To select the maximum data rate (460.8K bps) set switch position 1 to the ‘On’ position (silk-screen D1).
Card Setup Baud Rates and Divisors for the ‘Div1’ mode The following table shows some common data rates and the rates you should choose to match them 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 460.8K bps Choose this Data Rate 300 bps 600 bps 1200 bps 2400 bps 4800 bps 14.4K bps 28.8K bps 57.6K bps 115.
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 ULTRA COMM+2I.PCI can be installed in any of the PCI expansion slots and contains several jumper straps for each port that must be set for proper operation. 1. 2. 3. 4. 5. 6. 7. Turn off PC power.
Technical Description Technical Description The Sealevel Systems ULTRA COMM+2I.PCI provides a PCI interface adapter with 2 isolated asynchronous serial ports providing a versatile interface, field selectable as RS-232 for modems, printers and plotters, as well as RS-422/485 for industrial automation and control applications. Isolation is important in installations where the equipment being connected to the PC is either far from the PC, or on a different power transformer circuit.
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 A Serial Utility Diskette is supplied with the Sealevel Systems 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 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 B - How To Get Assistance Appendix B - How To Get Assistance 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. Sealevel Systems provides an FAQ section on its web site. Please refer to this for many commonly asked questions.
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 or EIA/TIA-232. The IBM PC computer defined the RS-232 port on a 9 pin D sub connector and subsequently the EIA/TIA approved this implementation as the EIA/TIA-574 standard.
Appendix C – Electrical Interface RS-485 RS-485 is backwardly compatible with RS-422; however, it is optimized for partyline or multi-drop applications. The output of the RS-422/485 driver is capable of being Active (enabled) or Tri-State (disabled). This capability allows multiple ports to be connected in a multi-drop bus and selectively polled. RS-485 allows cable lengths up to 4000 feet and data rates up to 10 Megabits per second. The signal levels for RS-485 are the same as those defined by RS-422.
Appendix D - Asynchronous Communications 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 the extreme this 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 4.2" 6.5" Sealevel Systems ULTRA COMM+2I.
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.
