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Summary of Contents for SeaLevel ISO-COMM
- Page 1 ISO-COMM USER MANUAL Sealevel Systems Inc. Telephone: (864) 843-4343 PO Box 830 Fax: (864) 843-3067 Liberty, SC 29657 USA www.sealevel.com...
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Page 2: Table Of Contents
Contents ................ 1 NTRODUCTION ..................1 VERVIEW ’ .................1 NCLUDED ............1 ACTORY EFAULT ETTINGS ................2 ETUP ..............2 DDRESS ELECTION ..............3 NABLE ISABLE IRQ S ................3 ELECTION ............4 NTERRUPT PTIONS E9..............6 EADERS ...............7 NTERFACE PTIONS RS-232 ..................7 RS-422 ..................7 Combined RS-232 and RS-422 ...........7 ................. - Page 3 Figure 8 - Headers E8 and E9 RS-485 Mode Enable ......6 Figure 9 - Four Port RS-232/RS-422 Configuration Table ....7 Figure 10 - Asynchronous Communications Bit Diagram....17 © Sealevel Systems, Inc. SL9149 Revision 7/2006 Sealevel Systems, Incorporated. All rights reserved.
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Page 4: Introduction
‘AT’ interrupts. Each port is independently addressable as COM1: through COM4:, or any other I/O address up to 3FF Hex. What’s Included The ISO-COMM is shipped with the following items. If any of these items are missing or damaged, contact the supplier. •... -
Page 5: Card Setup
Card Setup Card Setup The ISO-COMM contains several jumper straps which must be set for proper operation. Address Selection Each port on the ISO-COMM occupies 8 consecutive I/O locations. A DIP-switch is used to set the base address for these locations. Be careful when selecting the base address as some selections conflict with existing ports. -
Page 6: Port Enable / Disable
Card Setup Port Enable / Disable Each port on the ISO-COMM can be enabled or disabled with switch position 8 on the DIP-switch. The port is enabled with the switch ‘On’ or ‘Closed’ and disabled when ‘Off’ or ‘Open’. If any port is disabled, be sure to disable the interrupt request for that port by removing the IRQ jumper. -
Page 7: Interrupt Mode Options
Set that port block for ‘M’. This provides the pull-down resistor circuit that makes sharing of IRQs possible. If you are using more than one ISO-COMM or a compatible card in a bus you should only have one port set to ‘M’. The following example shows all four ports sharing a single IRQ. -
Page 8: Figure 6 - Header E5, Sharing Irqs With Another Adapter
Card Setup Set jumper to ‘S’ if you are using more than one ISO-COMM in a bus or you wish to completely remove the pull-down resistor for hardware compatibility. Setting the board in this configuration when it is not accompanied by a pull- down resistor will prevent the ports from triggering an interrupt. -
Page 9: Headers E8 And E9
"know how" to enable the driver when it is answering a poll. Failure to correctly set this jumper can cause transmitter contention problems preventing operation by any nodes on the network. Sealevel Systems communication software is compatible with this mode of operation. To enable the driver with RTS install jumpers at E9-A for port 1, E9-C for port 2, E8-A for port 3 and E8-C for port 4. -
Page 10: Interface Options
ISO-COMM series only one driver chip will be provided at either U33 or U34. Combined RS-232 and RS-422 On the four port ISO-COMM boards two ports of RS-232 and two ports of RS- 422 is possible, but it is complicated to configure. The configuration requires that you selectively bend (or float) pins on the DIP-resistor pack out of the socket. -
Page 11: Installation
Refer to the appropriate section of the Serial Utilities Software. System Installation The ISO-COMM can be installed in any of the PC expansion slots, but to access the ‘AT’ or (E)ISA IRQs (10, 11, 12, 15) the adapter must be installed in one of the 16 bit slots. -
Page 12: Technical Description
Technical Description Technical Description The Sealevel Systems ISO-COMM provides the PC with two or four additional ground isolated RS-422/485/232 or two or four non-isolated RS-422/485 serial ports for terminals, modems, printers, etc. 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. -
Page 13: Connector Pin Assignments
The most common way to do this is connect RTS to CTS and RI. Also, connect DCD to DTR and DSR. Terminating these pins, if not used, will help insure best performance from your adapter. Sealevel Systems ISO-COMM Page 10... -
Page 14: Specifications
Non-Condensing Non-Condensing Manufacturing • All Sealevel Systems Printed Circuit boards are built to U.L. 94V0 rating and are 100% electrically tested. These printed circuit boards are solder mask over bare copper or solder mask over tin nickel. Power Consumption Part #... -
Page 15: Appendixa - Troubleshooting
No two adapters can occupy the same I/O address. 3. Make sure the Sealevel Systems adapter is using a unique IRQ The IRQ is typically selected via an on-board header block. Refer to the section on Card Setup for help in choosing an I/O address and IRQ. - Page 16 3E8-3EF is typically reserved for COM3: • 2E8-2EF is typically reserved for COM4: 9. Remember Sealevel Systems diagnostic software when troubleshooting a problem. This will help eliminate any software issues and identify any hardware conflicts. Sealevel Systems ISO-COMM Page 13...
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Page 17: Appendixb - How T O Get Assistance
If possible, please have the adapter installed in a computer ready to run diagnostics. Sealevel Systems provides an FAQ section on its web site. Please refer to this to answer many common questions. This section can be found at http://www.sealevel.com/faq.htm... -
Page 18: Appendixc - Electrical Interface
0 (space) and -12 volts (-3 to -10 volts) denotes a binary 1 (mark). The RS-232 and the EIA/TIA-574 specification defines two type of interface circuits, Data Terminal Equipment (DTE) and Data Circuit-Terminating Equipment (DCE). The Sealevel Systems adapter is a DTE interface. RS-422 The RS-422 specification defines the electrical characteristics of balanced voltage digital interface circuits. -
Page 19: Rs-485
(Tx+ to Rx+ and Tx- to Rx-). Four wire mode allows full duplex data transfers. RS-485 does not define a connector pin-out or a set of modem control signals. RS-485 does not define a physical connector. Sealevel Systems ISO-COMM Page 16... -
Page 20: Appendixd - Asynchronous Communications
Common methods are called (E)ven Parity or (O)dd Parity. Sometimes parity is not used to detect errors on the data stream. This is referred to as (N)o parity. Sealevel Systems ISO-COMM Page 17... - Page 21 The data rate and communication parameters for asynchronous communications have to be the same at both the transmitting and receiving ends. The communication parameters are baud rate, parity, number of data bits per character, and stop bits (i.e. 9600,N,8,1). Sealevel Systems ISO-COMM Page 18...
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Page 22: Appendixe - Silk -Screen
Appendix E - Silk-Screen Appendix E - Silk-Screen 4.2" 13.33" 3.9" Sealevel Systems ISO-COMM Page 19... -
Page 23: Appendixf - Schematic
Appendix F - Schematic Appendix F - Schematic Sealevel Systems ISO-COMM Page 20... - Page 24 Appendix F - Schematic Sealevel Systems ISO-COMM Page 21...
- Page 25 Appendix F - Schematic Sealevel Systems ISO-COMM Page 22...
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Page 26: Appendixg - Compliance Notices
Always use cabling provided with this product if possible. If no cable is provided or if an alternate cable is required, use high quality shielded cabling to maintain compliance with FCC/EMC directives. Sealevel Systems ISO-COMM Page 23... -
Page 27: Warranty
Sealevel Systems assumes no liability for any damages, lost profits, lost savings or any other incidental or consequential damage resulting from the use, misuse of, or inability to use this product. Sealevel Systems will not be liable for any claim made by any other related party.
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