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Summary of Contents for SeaLevel ULTRA COMM+422
- Page 1 ™ ULTRA COMM+422 USER’S MANUAL Part Number 3440 Sealevel Systems, Inc Phone: (864) 843-4343 155 Technology Place Fax: (864) 843-3067 P.O. Box 830 www.sealevel.com Liberty, SC 29657...
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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 ................4 UMPER ELECTIONS IRQ Selection ................4 ................5 NTERRUPT ODES RS-485 E ..............6 NABLE ODES Interface Mode Examples J1D –... - Page 3 Figure 11 - Headers J1E - J4E, Line Termination..........9 Figure 12 - Clocking Mode 'Divide By 4’............10 Figure 13 - Clocking Mode 'Divide By 2’............10 Figure 14 - Clocking Mode 'Divide By 1’............10 Figure 15 - Asynchronous Communications Bit Diagram......23 © 1998c Sealevel Systems, Incorporated. All rights reserved.
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Page 5: Introduction
The Sealevel Systems ULTRA COMM+422 provides the PC with four additional RS-422/485 serial ports for terminals, modems, printers, etc. The unique feature of the ULTRA COMM+422 is the ability to be RS-485 compatible without the need for special software or drivers. This ability is especially useful in Windows, Windows NT, and OS/2 environments where the lower level I/O control is abstracted from the application program. -
Page 6: Card Setup
Each port on the ULTRA COMM+422 occupies eight consecutive I/O locations. A DIP-switch is used to set the base address for these locations. The ULTRA COMM+422 has a unique addressing scheme that allows it to be completely compatible with Sealevel Systems’ older four port RS-422/485 interface adapter (p/n 3067) and provide for the ability to select address combinations more commonly used. -
Page 7: Figure 2 - Address Selection Table
XXXX where X = a non-selectable address bit. 1 2 3 4 5 6 7 Port # Connector Location Address Example (Base=2E0) Base+0 2E0-2E7 Base+8 2E8-2EF Base+16 2F0-2F7 Base+24 2F8-2FF Figure 3 - Port to Connector Table Sealevel Systems ULTRA COMM+422 Page 3... -
Page 8: Jumper Selections
Any two or more ports can share a common IRQ by placing the jumpers on the same IRQ setting and setting the appropriate selections at J1A through J4A. Consult your particular software for IRQ selection. If no interrupt is desired, remove the jumper. Sealevel Systems ULTRA COMM+422 Page 4... -
Page 9: Interrupt Modes
N S M Figure 5 - Header J1A & J2A, Shared IRQ Mode Set the jumper to ‘S’ if you are using more than one ULTRA COMM+422 in a bus or to completely remove the pull-down resistor for hardware compatibility. -
Page 10: Rs-485 Enable Modes
Some communication software packages refer to RS-485 as RTS enable or RTS block mode transfer. One of the unique features of the ULTRA COMM+422 is the ability to be RS- 485 compatible without the need for special software or drivers. This ability is especially useful in Windows, Windows NT, and OS/2 environments where the lower level I/O control is abstracted from the application program. -
Page 11: Interface Mode Examples J1D - J4D
Interface Mode Examples J1D – J4D Figure 6- Headers J1D- J4D, RS-422 Figure 7 - Headers J1D- J4D, RS-485 ‘Auto’ Enabled, with ‘No Echo’ Figure 8 - Headers J1D- J4D, RS-485 ‘Auto’ Enabled, with ‘Echo’ Sealevel Systems ULTRA COMM+422 Page 7... -
Page 12: Interface Mode Examples J1D - J4D (Continued)
Card Setup Interface Mode Examples J1D – J4D (continued) Figure 9 - Headers J1D- J4D, RS-485 ‘RTS’ Enabled, with ‘No Echo’ Figure 10 - Headers J1D- J4D, RS-485 ‘RTS’ Enabled, with ‘Echo’ Sealevel Systems ULTRA COMM+422 Page 8... -
Page 13: Line Termination
ULTRA COMM+422 adapters are configured in an RS-485 network, only the boards on each end should have jumpers T, P & P ON. Refer to the following table for each position’s operation: Name Function Adds or removes the 1K ohm pull-down resistor in the RS-422/RS-485 receiver circuit (Receive data only). -
Page 14: Clock Modes
Card Setup Clock Modes The ULTRA COMM+422 employs a unique clocking option that allows the end user to select from divide by 4, divide by 2 and divide by 1 clocking modes. These modes are selected at Headers J1C through J4C. -
Page 15: Baud Rates And Divisors For The 'Div1' Mode
For this Data Rate Choose this Divisor 1200 bps 2400 bps 4800 bps 9600 bps 19.2K bps 38.4K bps 57.6K bps 115.2K bps 230.4K bps 460.8K bps Sealevel Systems ULTRA COMM+422 Page 11... -
Page 16: Baud Rates And Divisors For The 'Div2' Mode
If your communications package allows the use of Baud rate divisors, choose the appropriate divisor from the following table: For this Data Rate Choose this Divisor 1200 bps 2400 bps 4800 bps 9600 bps 19.2K bps 38.4K bps 57.6K bps 115.2K bps 230.4K bps Sealevel Systems ULTRA COMM+422 Page 12... -
Page 17: Installation
Installation Installation The ULTRA COMM+422 can be installed in any of the PC expansion slots. The ULTRA COMM+422 contains several jumper straps for each port that must be set for proper operation. 1. Turn off PC power. Disconnect the power cord. -
Page 18: Technical Description
Instruments 16C750 UARTs, that provide deeper FIFOs (32 bytes) and enhanced clocking features. A second version of the ULTRA COMM+422, p/n 3441 is available without the auto enable feature for a reduced price. If point to point RS-422 or RTS enabled RS-485 operations are desired, this option should be considered. -
Page 19: Interrupts
Every main sub-system in the PC has it’s own interrupt, frequently called an IRQ (short for Interrupt ReQuest).. In these early days of PC’s Sealevel Systems decided that the ability to share IRQs was an important feature for any add-in I/O card. Consider that in the IBM XT the available IRQs were IRQ0 through IRQ7. -
Page 20: Why Use An Isp
287, 28F… etc.). The ULTRA COMM+422 will allow any one of the available locations to be read to obtain the value in the status register. All four status ports on the ULTRA COMM+422 are identical, so any one of the four can be read. -
Page 21: Connector Pin Assignments
Request To Send Negative Output Receive Data Positive Input Receive Data Negative Input CTS+ Clear To Send Positive Input CTS- Clear To Send Negative Input DB-37 Connector Pin Assignments Port # RTS- CTS- RTS+ CTS+ Sealevel Systems ULTRA COMM+422 Page 17... -
Page 22: Specifications
IPC 610-A Class-III standards are adhered to with a 0.1 visual A.Q.L. and 100% Functional Testing. • 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. -
Page 23: Appendixa - Troubleshooting
No two adapters can occupy the same I/O address. 3. Make sure the Sealevel Systems adapter is using a unique IRQ. While the Sealevel Systems adapter does allow the sharing of IRQs, many other adapters (i.e. SCSI adapters & on-board serial ports) do not. The IRQ is typically selected via an on-board header block. - Page 24 9. Please refer to your included diskette for any post production manual updates and application specific information. 10. Always Sealevel Systems diagnostic software when Troubleshooting a problem. This will eliminate the software issue from the equation. Sealevel Systems ULTRA COMM+422 Page 20...
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Page 25: Appendixb - How T O Get Assistance
If possible, please have the adapter installed in a computer ready to run diagnostics. 3. Sealevel Systems maintains a Home page on the Internet. Our home page address is www.sealevel.com. The latest software updates, and newest manuals are available via our FTP site that can be accessed from our home page. -
Page 26: Appendixc - Electrical Interface
(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 ULTRA COMM+422 Page 22... -
Page 27: Appendixd - Asynchronous Communications
The communication parameters are baud rate, parity, number of data bits per character, and stop bits (i.e. 9600,N,8,1). Sealevel Systems ULTRA COMM+422 Page 23... -
Page 28: Appendixe - Silk -Screen
Appendix E - Silk-Screen Appendix E - Silk-Screen 4.2" 8.0" 3.9" Sealevel Systems ULTRA COMM+422 Page 24... -
Page 29: Appendixf - 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 ULTRA COMM+422 Page 25... -
Page 30: 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.
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