Related Manuals for Fastcom RS-422
Summary of Contents for Fastcom RS-422
- Page 1 ™ A ASTCOM DAPTERS FASTCOM™: 422/2-PCI 1.5Mbaud Dual Channel RS-422/RS-485 Interface for PCI Bus Hardware Reference Manual Manufactured by: 9011 E 37th St N Wichita KS 67226-2006...
- Page 3 All rights reserved, including those to reproduce this document or parts thereof in any form without permission in writing from Commtech, Inc. FASTCOM and SMART14 are trademarks of Commtech, Inc. IBM is a registered trademark of International Business Machines Corporation.
- Page 4 REVISION NOTES REVISION PAGE NUMBER CHANGES MADE Changed warranty to 2 years Added link to installation manual Updated contact information Updated Fastcom Serial Settings Changed warranty period to lifetime...
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Page 5: Table Of Contents
Board Layout ........................5 INSTALLATION Installing the Hardware / Software................... 6 Testing the Installation..................... 6 FASTCOM SERIAL SETTINGS.................... 8 DB9 PIN DESCRIPTION ....................10 RS-422/485......................... 11 Termination Resistance....................12 TECHNICAL SUPPORT ..................... 13 APPENDIX A 16C850 UART Technical Data ..................14... -
Page 7: Ce" Certificate
Information Technology Equipment The Company COMMTECH, INC. declares under its own and full responsibility that the product " Fastcom: 422/2-PCI - Revision 1.0 " on which is attached this Certificate is compliant to the "89/336/EEC" Directive, amended by 92/31/EEC and 93/88/EEC. -
Page 9: Introduction
Windows NT and Windows 98. The two advanced UARTs on the Fastcom: 422/2-PCI are each capable of all standard baud rates plus a high-speed mode capable of up to an amazing 1.5 Mbaud. -
Page 10: Specifications / Features
INTERRUPT REQUIREMENTS: 1 (per board) FEATURES: New high performance 16C850 UARTS Standard on the Fastcom: 422/2-PCI, no extra charge All baud rates up to 1.5 Mbaud 128 byte FIFOs for improved throughput User programmable baud rate “Switchless” design Hardware control for 485 driver “Echo cancel”... -
Page 11: Board Layout
BOARD LAYOUT 16C850 UARTs CHANNEL 1 (DB9 CONNECTOR) TRANSMIT/RECEIVE LEDs CHANNEL 1 CHANNEL 2 CHANNEL 2 (DB9 CONNECTOR) PCI CONTROLLER PACKING LIST FASTCOM: 422/2-PCI CARD FASTCOM CD If an omission has been made, please call technical support for a replacement. -
Page 12: Installing The Hardware / Software
DB9 male plug, solder cup style, and two short pieces of 20 or 24 AWG stranded wire. This loop back plug can be used to test any RS-422 port. Jumper the pins together on the DB9 as illustrated below: TESTING YOUR FASTCOM ASYNC PCI PORT IN WINDOWS These instructions assume that you have already installed the card and have followed the installation instructions. - Page 13 IRQ (either Device or Driver Exclusive IRQ setting). Try a different PCI slot or disable the other offending device. 3. IRQ steering is enabled on Windows 98 and Windows is not assigning an IRQ to the Fastcom card. Try disabling IRQ steering or varying the options in Control Panel ->System ->Device Manager ->System Devices ->PCI Bus.
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Page 14: Fastcom Serial Settings
BaudTable (Win2K/XP) This table represents the standard baud rates that the Fastcom card will currently support. If you wish to use a non-standard baud, you may enter it into one of the boxes on the table and hit the tab key (do not hit enter, hitting enter will exit the program). - Page 15 INPUT FREQUENCY This is the calculated frequency required to generate the baud rate requested. When you click OK on the Fastcom Serial Settings page, this frequency is sent to the clock generator and the new baud rates will be available.
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Page 16: Db9 Pin Description
DB9 PIN DESCRIPTION The FASTCOM: 422/2-PCI features two RS-422/RS-485 channels, which are accessed through two DB9 connectors on the board. The following is a pin description of the DB9 connectors: PIN NO. SIGNAL NAME DIRECTION SIGNAL GROUND (GND) GROUND READY TO SEND + (RTS+) OUTPUT READY TO SEND –... - Page 17 Most engineers have worked with RS-232 devices at least once in their career. If you have never worked with RS-422 or RS-485 devices, you will be pleased to know that working with the FASTCOM: 422/2-PCI is not much different from working with an RS-232 device.
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Page 18: Termination Resistance
TERMINATION RESISTANCE In both the RS-422 and the RS-485 mode, the receiver end of the cable between two stations must be terminated with a resistor equal to the characteristic impedance of the wire. This is to prevent signal reflections in the wire and to improve noise rejection. -
Page 19: Technical Support
Commtech provides extensive technical support and application suggestions. Most of the problems that occur with the FASTCOM: 422/2-PCI can be corrected by double-checking the switch positions, your cables and your program. We recommend that you build the loop back plug that is described in the Programming section of this manual. -
Page 20: 16C850 Uart Technical Data
APPENDIX A 16C850 UART DATA...
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