Advantech PCL-746+ User manual

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

8PCL-746+ User's Manual
Initial Inspection
Depending on the option you ordered, you should find (in addition to
this manual) the following items inside the shipping container:
PCL-746+
•OnePCL-746+ 4-portserial card(with 16C550 orcompatible UART)
•One30-cmmale DB-37to fourmaleDB-25cable
Wecarefully inspected the PCL-746+ mechanically and electrically
before we shipped it. It should be free of marks and scratches and in
perfect working order on receipt.
As you unpack the PCL-746+, check it for signs of shipping damage
(damaged box, scratches, dents, etc.). If it is damaged or it fails to meet
specifications, notify our service department or your local sales
representative immediately. Also notify the carrier. Retain the shipping
carton and packing material for inspection by the carrier. After inspec-
tion we will make arrangements to repair or replace the unit.
When you handle the PCL-746+, remove it from its protective packag-
ing by grasping the rear metal panel. Keep the anti-vibration packing.
Whenever you remove the card from the PC, store it in this package for
protection.
Warning! Discharge your body’s static electric charge by
touching the back of the grounded chassis of the
system unit (metal) beforehandling theboard.You
should avoid contact with materials that hold a static
charge such as plastic, vinyl and styrofoam. Handle
the board only by its edges to avoid static damage to
its integrated circuits.Avoid touching the exposed
circuitconnectors.

Chapter 2 Hardware Installation 9
PCL-746+ Switch and Jumper Layout

10 PCL-746+ User's Manual
Jumper settings
This section tells how to set the jumpers to configure your card. It
gives the card default configuration and your options for each jumper.
How to set jumpers
You configure your card to match the needs of your application by
setting jumpers. A jumper is the simplest kind of electric switch. It
consists of two metal pins and a small metal clip (often protected by a
plastic cover) that slides over the pins to connect them. To “close” a
jumper you connect the pins with the clip. To “open” a jumper you
remove the clip. Sometimes a jumper will have three pins, labeled 1, 2
and 3. In this case you would connect either pins 1 and 2 or 2 and 3.
You may find pair of needle-nose pliers useful for setting the jumpers.
If you have any doubts about the best hardware configuration for
your application, contact your local distributor or sales representative
before you make any changes.
Card Configuration
Each port of the PCL-746+ card has two associated status jumper
groups which require configuring prior to use. One group is to select
eitherRS-232 or RS-422/RS-485 communication protocols. Theother
group selects RS-422 or RS-485. You will then need to select the cards
appropriate I/O address and IRQ.
OpenOpen
OpenOpen
Open ClosedClosed
ClosedClosed
Closed Closed 2-3Closed 2-3
Closed 2-3Closed 2-3
Closed 2-3

Chapter 2 Hardware Installation 11
Default Settings
The board will be shipped in the RS-232 mode (Enhanced), all the
jumpers on the 12*3 pin jumper will be set to the upper position, this is
the cards default setting. The PCL-746+ DIP switch and jumper default
settings are as shown below:
PCL-746+ Default Configuration
Jumper Default Function
Port1 RS-232
Port2 RS-232
Port3 RS-232
Port4 RS-232
JP4 IRQ12
S1 Address300H
S5 Interruptregister280H
Protocol Selection
Firstly you have to decide which mode each port will be operating in,
RS-232, RS-422 or RS-485. You can configure each port to operate in a
different mode if required. Each port has to be individually setup by
selecting the correct jumper configurations on two jumper groups, one
pair for each port. These consist of a 12*3 pin jumper (RS-232) and a
1*3pinjumper(RS-422/RS-485).
Note:The second (RS-422/RS-485) jumper group is ineffective
when the main jumper group is configured to operate in
theRS-232 mode.
RS-232 or RS-422/RS-485 Mode Selection
Should you wish to configure the PCL-746+ to operate in the RS-232
mode, then the upper two pins of the 12*3 pin jumper should be
connected. For RS-422/ RS-485 mode selection, the bottom two pins of
the 12*3 pin jumper should be connected as shown below.

12 PCL-746+ User's Manual
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
RS-232 mode
1 2 3 4 5 12
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
RS-422/RS-485 mode
1 2 3 4 5 12
Port 4
Port 1
Port 4
Port 1
RS-422/RS-485 Mode Selection
ForeitherRS-422orRS-485modeselectionthe1*3pinjumpersfor
each port have to be configured. For RS-422 configuration the upper
two pins of the 3-pin jumper should be connected. A 2-pin jumper is
used for Tx control. Closing the jumper initiates Tx automatic flow
control. An open jumper means that Tx is always on. For RS-485
configuration the bottom two pins of the 3-pin jumper should be
connected. The 2-pin jumper is always closed as shown below.

Chapter 2 Hardware Installation 13
I/O Address and Interrupt Setup
Next you will need to select an IRQ (interrupt request) number and an
I/O base address for the PCL-746+.
Mode Setup (S5)
The cards base address can be setup using S5. Please note that the
first DIP switch is for mode setting as shown below.
Standard Mode
In this mode each of the four ports can be setup as the address or the
IRQchannel individually.
Port1 CH1 Base Address AAA, CH1IRQM
Port2 CH2 Base Address BBB, CH2IRQN
Port3 CH3 Base Address CCC, CH3IRQO
Port4 CH4 Base Address DDD, CH4IRQP
Enhanced Mode
In this mode all four ports share the same IRQ and continue to use the
cards designated IRQ address. This mode also utilizes an interrupt
status register designed to indicate which serial port has generated an
interrupt. This speeds up interrupt processing resulting in a greater
throughput for each multi-port card.

14 PCL-746+ User's Manual
Port1 CH1 Base Address AAA, CH1IRQM
Port2 CH2 Base Address BBB, CH1IRQM
Port3 CH3 Base Address CCC, CH1IRQM
Port4 CH4 Base Address DDD, CH1IRQM
In the above table the base address is set by S1~S4 and the IRQ
channel number set by the IRQ select jumper JP4 (see page 15).
I/O Base Address (S1~S4)
Select an address which is not already in use by another card in the
system. Ifyou are installing morethanonePCL-746+cardinyour
system,setthecardstodifferentbaseaddresses. DIPswitches S1~S4
control the card(s) base address, as shown:
S1~S4(DIPSwitch Figure)
Card base address (S1~S4)
Base address A3 A4 A5 A6 A7 A8 A9
100H l l l l l ¡ l
108H ¡ l l l l ¡ l
110H l ¡ l l l ¡ l
l
l
l
300H (CH1) l l l l l ¡ ¡
308H (CH2) ¡ l l l l ¡ ¡
310H (CH3) l ¡ l l l ¡ ¡
318H (CH4) ¡ ¡ l l l ¡ ¡
l
l
l
3F8H ¡¡¡¡¡¡¡
¡= Off l= On *= default
**
**
*
**
**
*
**
**
*
**
**
*

Chapter 2 Hardware Installation 15
Standard Mode IRQ Selection (JP1~JP4)
In this mode each of the four ports can have the IRQ channel set
individually. For each port, select an IRQ which is not already in use
by another card in the system. The map of jumpers and ports is shown
below:
Port 1 j JP4
Port 2 j JP3
Port 3 j JP2
Port 4 j JP1
Enhanced Mode IRQ Selection (JP4)
Select an IRQ which is not already in use by another card in the
system.If you areinstallingmorethanonePCL-746+,set them to a
different IRQnumber.Jumper bank JP4 controlsthe card IRQ.Simply
place the jumper on the required interrupt level as shown in the
followingfigure.
JP4IRQ12(default)
o o o o o o o o o
o o o o o o o o o
o
o
15 12 11 10 9 7 5 4 3

16 PCL-746+ User's Manual
Interrupt Status Register Setup (S5)
This feature on the PCL-746+ is utilized in the enhanced mode only.
When data arrives at one of the four ports, it will generate an interrupt
in the interrupt register. The PC software can read this and identify
immediately which port generated the interrupt. This saves time and
makes programming easier. When a data bit of the interrupt status
register is set to 0, the corresponding channel is selected to generate
an interrupt. If the bit is 1, then no interrupt is generated.
DIP switch S5 controls the cards interrupt status register, as shown in
the following figure and table:
S5280H(default)
Interrupt status register S5
Bit Function
0Port 1
1 Port 2
2 Port 3
3 Port 4
4NotUsed
5 NotUsed
6 NotUsed
7 NotUsed
The user may change the interrupt status address via S5. Please note
that the address decoder will occupy a continuous 16 bytes of area
related to the switch setting. For example, if you set the switch to
010H, then the address 010H to 01FH will all be decoded. The various
DIP Switch settings (S5) for the Interrupt status register are as follows:

Chapter 2 Hardware Installation 17
S5DIP switch settings000H to 110H