Advantech PCL-746+ Manuale utente
Part No. 2000746001 4th Edition
Printed in Taiwan May 2001
Copyright Notice
This documentation and the software included with this product are
copyrighted 2001 by Advantech Co., Ltd. All rights are reserved.
Advantech Co., Ltd. reserves the right to make improvements to the
products described in this manual at any time without notice.
No part of this manual or software may be reproduced, copied,
translated or transmitted, in any form or by any means without the
prior written permission of Advantech Co., Ltd. Information provided
in this manual is intended to be accurate and reliable. However,
Advantech Co., Ltd. assumes no responsibility for its use, nor for any
infringements of rights of third parties which may result from its use.
Acknowledgments
PC-LabCard is a trademark of Advantech Co., Ltd. IBM, PC and
PC/XT/AT are trademarks of International Business Machines
Corporation.MS-DOS,MASM,QuickBASIC,MicrosoftCandMS-
PASCAL are trademarks of Microsoft Corporation. Intel is a trademark
of Intel Corporation. Turbo C and Turbo PASCAL are trademarks of
Borland International.
Contents
Chapter 1 Introduction ............................................ 1
Description............................................................................. 2
Chapter 2 Hardware Configuration ......................... 7
Initial Inspection ................................................................... 8
PCL-746+ Switch and Jumper Layout ............................... 9
Jumper settings................................................................... 10
Card Configuration ............................................................. 10
Protocol Selection ............................................................... 11
I/O Address and Interrupt Setup ..................................... 13
Chapter 3 Installation ............................................. 21
Card installation .................................................................. 22
Chapter 4 Software Installation
For UNIX Users ....................................... 23
SCO UNIX/XENIX.............................................................. 24
Chapter 5 Wiring .................................................... 27
Wiring.................................................................................... 28
RS-232signal wiring ............................................................28
RS-422signal wiring ............................................................30
RS-485Signal wiring ............................................................31
Appendix A Connector Pin Assignments .................. 33
Appendix B PC I/O Address Reference ..................... 37
APPENDIX B PC I/O Address Usage ............................ 38
Chapter 1 Introduction 1
1
Introduction
CHAPTER
2PCL-746+ User's Manual
Description
The PCL-746+ is a four port serial communication interface card. Each
portcan be configured individually to either RS-232, RS-422 orRS-485
using on-board jumpers.
ThePCL-746+'s four 16C550UARTs(on-chip 16-byte FIFO buffers)
make serial I/O more reliable. By buffering data into 16-byte packets
before putting it on the bus the UARTs drastically reduce the CPU
load. This makes the PCL-746+ especially suitable for high speed serial
I/O applications under MS Windows.
The PCL-746+ supports two operation modes: standard mode and
enhanced mode. In standard mode each of the four ports can be set up
individually as either the address or the IRQ channel. In enhanced
mode, all four ports can be set to share the same IRQ. When an on-
board interrupt occurs the interrupt status register indicates which
port has generated it. The shared interrupt can be set to most common
(extended ) AT interrupts. This simplifies programming, speeds up
interrupt processing and frees up interrupts for other devices.
In RS-485 mode, the PCL-746+ automatically senses the direction of
incoming data and switches its transmission direction accordingly.
Therefore no handshaking signal (e.g. RTS signal) is necessary. This
feature lets you simply and quickly build an RS-485 network with just
two wires. More importantly, application software previously written
for half duplex RS-232 environments, can be maintained without need
formodification.
Chapter 1 Introduction 3
Features
•Fourindependent RS-232, RS-422 or RS-485 serialports
•Eachport is individually configurableto RS-232, RS-422 or RS-485
(Jumper selectable)
•16C550UARTsforPCL-746+
•Speed up to 115 Kbps
•CompleteRS-232 modem-control signals
•Up to two cards for a total of eight ports in one system
•Interruptsjumper selectable, IRQ 3, 4, 5,7, 9, 10, 11, 12 or15
•On-board interrupt status register for greater throughput
•Compatiblewith standard PC ports: COM1, COM2, COM3 or COM4
•RS-422or RS-485 modesjumper selectable
•Automatic data flow control in RS-485 mode
•Supports2-wire or4-wire RS-422/RS-485 operation
•Space reserved for terminator resistor
•Space reserved for optional surge protection on all port lines
(RS-422/RS-485modeonly)
•LED indicators on each port indicate data flow
•Compatible with Arnet 4-port cards supporting SCO UNIX/XENIX
4PCL-746+ User's Manual
Applications
•Interface to PLC, barcode reader, scale, POS
•Interfaceto modem, mouse, plotter,printer, BBS
•RS-232terminalinterfaces
•Multi-drop communication networks
•Long-distance serial links
•Multi-user operating systems
•Laboratory data collection and process control
Specifications
Board
•Numberofports:4
•Protocolselection:RS-232,RS-422 orRS-485 (jumperselectable)
•UART:PCL-746+:4x16C550(16byteFIFO)
•BaseI/O addressselection:From 100Hto 3C0H
•IRQselection: 3, 4,5, 7,9, 10,11, 12or 15
•Interruptstatusregister: From000H to3F0H
•Databits:5,6,7,8
•Parity: Even, odd or none
•Stopbits:1,1.5,2
•Powerconsumption:+5V,800mAtypical,1.5Amax.
±12V,60mAtypical,120mAmax.
•Operatingtemperature: 32to 122oF(0 to 50oC)
•Dimensions:185mmx98mm
•Weight:150g
Chapter 1 Introduction 5
RS-232 Interface
•Signals:TxD,RxD,RTS,CTS,DTR,DSR,DCD,RI,GND
•Mode: Asynchronous full duplex, point-to-point
•Maxdatarate:115Kbps
•Maxdatadistances:50feet(15.2meters)
RS-422 Interface
•Signals:
TxD+,TxD-,RxD+,RxD-,RTS+,RTS-,CTS+,CTS-,GND
•Mode: Asynchronous full duplex, point-to-point
•Maxdatarate:115Kbps
•Maxdatadistances:4000feet(1220meters)
RS-485 Interface
•Signals: DATA+, DATA-, GND
•Mode:Halfduplex,multi-drop
•Maxdatarate:115Kbps
•Maxdatadistances:4000feet(1220meters)
Connectors
•30-cmmaleDB-37to fourmaleDB-25 cable
•Weight: 250 g
6PCL-746+ User's Manual
Chapter 2 Hardware Installation 7
2
Hardware
Configuration
CHAPTER
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