Digital Input Output Card DIG-64 Document Part Document Refe
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DIG-64
Digital Input Output Card
DIG-64
Document Part Document Reference: Document Issue Level: Manual covers PCBs identified:
0127-1005 DIG-64\.\127_1005.DOC DIG64 Issue (where digit)
rights reserved. part this publication reproduced, stored retrieval system, transmitted, form means, electronic, mechanical, photocopied, recorded otherwise, without prior permission, writing, from publisher. permission contact Blue Chip Technology. Information offered this manual correct time printing. Blue Chip Technology accepts responsibility inaccuracies. This information subject change without notice. trademarks registered names acknowledged.
Blue Chip Technology Limited Chowley Tattenhall Chester, Cheshire Telephone: 01829 772000 Facsimile: 01829 772001 website: www.bluechiptechnology.co.uk
Amendment History Issue Level Issue Date 1/6/98 5/8/98 9/11/00 Author Amendment Details First issue Minor typographical errors corrected. reference (ECN99/088)
Contents
INTRODUCTION.1 ABOUT MANUAL INSTALLING DIG-64.3 Base Address Interrupt Selection.4 Caution CONNECTION DETAILS Opto Isolator Inputs J3.6 Relay Outputs Digital Input/Output Ports DIGITAL INPUTS. Input Conditioning DIGITAL OUTPUTS. Caution PROGRAMMING DETAILS Addressing Programming Control Word Table Example Program.13 TECHNICAL SPECIFICATION. Electromagnetic Compatibility (EMC).16 Appendix NUMBERING SYSTEMS Binary Hexadecimal Numbers Base Address Selection Appendix MAPS PC/XT/AT Address Map.21 PC/XT Interrupt Map.22 PC/AT Interrupt Map.22 Channels.22 Appendix BOARD LAYOUT
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Introduction
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INTRODUCTION
DIG-64 PC-compatible card that provides user with digital opto-isolated inputs, relay outputs TTL-level digital input/outputs. card features user selectable base address interrupt level. addition field replaceable series resistance packs allow selection input voltage range. card fitted with "Polyswitch" resettable fuses protect each relay outputs volt volt feeds card. These "fuses" rupture their rating exceeded then heal themselves once power removed minutes This prevents unnecessary repair work when errors made during installation wiring.
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About Manual
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ABOUT MANUAL
This manual organised into four chapters, appendices. Each chapter covers different aspect using DIG-64. order best results from product, user urged read chapters, paying particular note Chapter which deals with initial installation card. appendices used reference time.
Chapter Explains configure card your computer user selectable links. Chapter Details connections from card. Chapter Gives details card' address mapping internal register details allowing user write custom software control card. Chapter Details card' technical specification. this section determine card' suitability particular application. Appendix Gives brief introduction Binary Hexadecimal numbering systems those unfamiliar with concepts. Appendix Lists IBM-PC address map, interrupt allocations should used along with Chapter when first installing card. Appendix Shows Printed Circuit Board layout.
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Chapter
Installation
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CHAPTER
INSTALLING DIG-64
Before installing card into your computer system, there number user-configurable links that must set. positioning these links will depend upon computer system into which card being fitted. Before fitting links card please read next section. unfamiliar with binary hexadecimal number systems primer included appendix.
Base Address
correct operation card host computer, range addresses that card will occupy must set. base address represents first address that card will use. DIG-64 requires total contiguous addresses (including base address) correct operation. Blue Chip Technology cards factory default base address hex. Check ensure that base address full range addresses free use. addresses free another range must chosen. guide, please information contained appendix assist choosing suitable base address. sure, refer your computer system handbook information relating other peripheral devices, possibly already installed (additional communications cards, parallel ports games ports etc.). addresses available then proceed Locate header pins (LK1). These pins marked "BASE ADDRESS". Each pair pins represents binary digit starting with pair pins marked with arrow. This pair pins represents lowest value (010 hex), subsequent pins represent increasing values. highest single base address link hex. select address, link position must left open. Placing link pair pins deselects that particular address.
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Chapter
Installation
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Example: select base address hex, links should follows:-
Figure Example Base Address Selection
Interrupt Selection
part link between DIG-64 host computer, interrupt signal occur when input changes state. application software then interrupt service calling device. interrupts essential enhance functionality card. default manufacturing setting that port going will generate interrupt selected interrupt line (LK2). interrupt required, link LK2. Other inputs "wire generated interrupts manufacturing build options. Please contact Sales Office further details. DIG-64 Interrupt Channels IRQ-2 with selection base addresses, chosen Interrupt Channel must free selected other peripheral system. Appendix used identify Interrupt Channels that normally already most systems which ones will probably free use. Check that selected channel free use. sure, refer your computer system handbook information relating other peripheral devices, possibly already installed (additional communications cards, parallel ports games ports etc.). Interrupt Channel chosen available DIG-64 then card Locate header pins labelled LK2. select interrupt, place link pair pins corresponding chosen Interrupt Request Channel. Only channel should selected, other pins must left open.
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Chapter
Installation
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Caution
mercury-wetted reed relays used, imperative that circuit board used vertical plane. This ensures that mercury pool inside relays correct position relative contacts. note that effect included issue level circuit boards. When card installed card should held vertically with gold fingers pointing down, then tapped gently hard surface. This ensures that pool mercury drops bottom reed capsule. Failure observe these precautions will result erratic operation relay contacts.
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Chapter
Connecting Board
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CHAPTER
CONNECTION DETAILS Opto Isolator Inputs
following table refers socket rear card (J3), which receives incoming signals opto-isolators. connector right when looking 'into' pins connector. inputs applied across pairs, polarity-sensitive.
SIGNAL volts volts Port Port Port Port Port Port Port Port Port Port Port Port Port Port Port Port volts
SIGNAL volts volts Port Port Port Port Port Port Port Port Port Port Port Port Port Port Port Port
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Relay Outputs
following table refers 40-way plug inner card (J4), which provides relay contact outputs. connector bottom right when looking 'into' pins connector with gold edge connector pointing down. port outputs uncommitted relay contacts across pairs, polarity-sensitive.
SIGNAL volts Port Port Port Port Port Port Port Port Port Port Port Port Port Port Port Port volts volts
SIGNAL Port Port Port Port Port Port Port Port Port Port Port Port Port Port Port Port volts volts
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Connecting Board
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External Relay Output Connector on-board relay outputs (available brought back-panel using optional cable connector assembly. This 37-way D-type connector mounted bracket, which connects When this used outputs follows:
SIGNAL volts Port Port Port Port Port Port Port Port Port Port Port Port Port Port Port Port volts volts
SIGNAL Port Port Port Port Port Port Port Port Port Port Port Port Port Port Port Port volts volts
Note transposition connector numbers.
Digital Input/Output Ports
Three additional connectors provided facilitate connection further digital signals levels only. These arranged follows: Port Port Port Port port bits Connector port bits Connector port bits Connector port bits Connector
connector details follows:
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Chapter
Connecting Board
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Digital Port header)
SIGNAL port port port port volts SIGNAL port port port port volts
Digital Port header)
SIGNAL port port port port volts port port port port volts SIGNAL port port port port volts port port port port volts
Digital Port (9-pin mini-DIN)
SIGNAL port port port port volts SIGNAL port port port port volts
View Mini-DIN Connector (from rear panel)
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DIGITAL INPUTS
input signals card bracket DIG-64 opto-isolated operation with either signal, regardless polarity. incoming signals isolated from power supplies also from each other. When input signal high enough cause within opto-isolator switch output will read logic ("0"). When input signal switch opto-isolator, output will read logic high ("1"). input signals applied between desired pair connections
Input Conditioning
resistor packs (RN2 RN4) provided front board condition input current suitable level opto-isolators. value these resistors must calculated ensure that current passed through opto-isolator limited 10mA. opto-isolator will drop 1.5V constantly.
REQUIRED RESISTANCE (INPUT VOLTAGE 1.5V) ohms
following table gives some common examples using preferred resistor values:
Input Voltage Resistor Value 330R (fitted standard) 820R
Note: resistors individual resistor elements 16-pin package. input conditioning resistor pack input port conditions input port
DIGITAL OUTPUTS
DIG-64 board provides user with volt-free contacts general control applications. relay contacts will handle voltages mains potential currents small voltages with current handling Amps, depending upon relay type. relays standard reed relays, mercury-wetted reed relays. operating program read back status drive relays. Note returned values inverse data written relays, i.e. written relay outputs then value returned will hex. Printed Circuit Boards issue level required reed relays with in-built backEMF suppression diode across relay coil. Printed Circuit Boards issue level later fitted with separate suppression diodes, permitting relays without in-built diodes.
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Chapter
Connecting Board
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Caution
mercury-wetted reed relays used, imperative that circuit board used vertical plane. This ensures that mercury pool inside relays correct position relative contacts. note that effect included issue level circuit boards. When card installed card should held vertically with gold fingers pointing down, then tapped gently hard surface. This ensures that pool mercury drops bottom reed capsule. Failure observe these precautions will result erratic operation relay contacts.
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Chapter
Programming Board
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CHAPTER
PROGRAMMING DETAILS Addressing
address maps DIG-64 shown below. card occupies total sixteen contiguous addresses which twelve used. Some address registers both read write.
Address Base Base Base Base Base Base Base Base Base Base Base Base
Read Function Write Function Opto inputs None Opto inputs None Relay feedback Relay outputs Relay feedback Relay outputs Port Input/Output Register Port Port Input/Output Register Port Port Input/Output Register Port None Control Register Port Input/Output Register Port Port Input/Output Register available Port Input/Output Register available None Control Register
Programming
DIG-64 µPD71055 (8255) devices, fitted standard. first device located address Base supports three 8-bit programmable input/output channels which connected ports second device located Base supports 8-bit programmable input/output channel. remaining 8-bit channels connected. Each channels assigned either input output. below further details. following table gives summary most commonly used control words'which must written control port configure each before using this board. operate modes (mode 0-2). first mode (mode provides simple three 8-bit ports. Data simply written read from specified port without handshaking. following Control Code Table assumes mode required. Mode enables transfer data from specified 8-bit port conjunction with strobes handshaking signals. mode data transferred bi-directional 8-bit port with handshakes (Port
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Programming Board
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Control Word Table
Control Word (Hex) Control Word (Decimal) Sets Port Output Output Output Output Output Output Output Output Input Input Input Input Input Input Input Input Sets Port Output Output Input Input Output Output Input Input Output Output Input Input Output Output Input Input Sets High Bits Port Output Output Output Output Input Input Input Input Output Output Output Output Input Input Input Input Sets Bits Port Output Input Output Input Output Input Output Input Output Input Output Input Output Input Output Input
Example Program
following program Microsoft Basic will test operation first channel each PIOs, providing link made between corresponding connectors.
P1=&H304 BASE FIRST &H308 BASE SECOND GOSUB &H308 &H304 GOSUB GOTO LOOP CONTINUOUSLY P1+3, &H8B P2+3, &H9B (P2) THEN PRINT ERROR, (P2) A=A+A THEN GOTO GOTO THEN PRINT FAILED, GOTO PRINT PASSED NEXT RETURN
above program runs continuously only stopped pressing control break keyboard.
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Chapter
Technical Specification
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CHAPTER
TECHNICAL SPECIFICATION
Number Opto-isolated Input Channels Number Relay contact pairs Number digital input/output channels Interrupt Signal Options (Default from port IRQ-2 inclusive
Input Characteristics inputs opto-isolated from computer Ground each other. Inputs either signals. Isolation Voltage Volts Voltage Input Range Min. Volts Max. Volts* Input Load Current 10ma Input* Depends series resistance packs fitted. Relay Contact Characteristics (Mercury Wetted Reed Relays) Switching voltage Switching current Carry current Contact rating Life expectancy Static contact resistance Contact material Operate time Release time volts Amps peak/AC resistive Amps peak/AC resistive watts peak/AC resistive 200x106 volt 10mA Mercury (16mg) 1.75mSecs mSecs
Note: recommend high voltage operation because limitations connectors used their presence within computer system.
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Chapter
Technical Specification
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Digital Input/Outputs Number Channels Signal Levels Outputs Logic Level Logic High Level Drive Current arranged bits Volt Logic Levels
Volts (min.) Volts (max.) 2.5mA Volts (min.) Volts (max.) -400µA (Logic Low) Vout Volts -400 (Logic High) Vout Volts (Logic Low) (Logic High)
Input Loading
Addresses Total Address Range Required Bytes Board Connections Opto-Isolated Inputs Relay Outputs Digital Input/Output type socket header header header mini (plus screen) 8-bit
Bus: Protection Relay Outputs
Raychem RXE110 rated 0.89 Amps 1.10Amps "Trips" seconds Amps Raychem RUE110 rated 0.91 Amps 1.10 Amps "Trips" seconds Amps
volt Outputs
Dimensions Length Height Width Board Overall
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Chapter
Technical Specification
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Electromagnetic Compatibility (EMC)
This product meets requirements European Directive (89/336/EEC) Amending Directives, eligible bear mark. been assessed whilst operating Blue Chip Technology Icon industrial However, because board installed variety computers, certain conditions have applied ensure that compatibility maintained. meets requirements industrial environment (Class product) subject those conditions. board must installed computer system that provides screening suitable industrial environment. recommendations made computer system manufacturer/supplier must complied with regarding earthing installation boards. board must installed with backplate securely screwed chassis computer ensure good metal-to-metal contact. Most problems caused external cabling boards. imperative that external cabling board totally screened, that screen cable connects metal bracket board hence earth. recommended that round,screened cables with braided wire screen used preference those with foil screen drain wire. metal connector shells that connect around full circumference screen; they superior those which connect screen simple "pig-tail". Standard ribbon cable will adequate unless contained wholly within cabinetry housing industrial Ensure that screen external cable bonded good earth both cable. Cables that connect externally boards levels should exceed metres length. This restriction does apply opto-isolated input/output connections. Failure observe these recommendations invalidate compliance.
Warning This Class product. domestic environment this product cause radio interference which case user required take adequate measures.
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Technical Specification
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Specification Blue Chip Technology Icon industrial fitted with this card meets following specification: Emissions 55022:1995 Radiated Conducted 50082-1:1997 incorporating: Electrostatic Discharge Radio Frequency Susceptibility Conducted Susceptibility Fast Burst Transients
Class Class
Immunity
61000-4-2 61000-4-3 61000-4-6 61000-4-4
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Appendix
Numbering Systems
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Appendix NUMBERING SYSTEMS Binary Hexadecimal Numbers
normal numbering system termed DECIMAL because there possible digits single column numbers. Decimal numbers also referred numbers having Base When counting, numbers increment units column from next increment resets units column carries over into next column. This indicates that there been full (the base number) counts units column. second column therefore termed "tens" column. more convenient when programming number system that provides clearer picture hardware operational register level. most common number systems used BINARY HEXADECIMAL. These systems provide alternative representation decimal numbers. binary number there only possible values result binary numbering often known Base When counting binary numbers, number increments units column from next increment units column reset carried over next column. This column indicates that full counts have occurred units column. second column termed "twos" column. Hexadecimal numbers have values followed letters also known system with Base With this counting system units increment from with decimal system, next count units column increments from then After units column resets next column increments from This indicates that sixteen counts have occurred units column. second column termed "sixteens" column.
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Appendix
Numbering Systems
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following table shows three systems indicate successive numbers
Decimal Base Binary Base Hexadecimal Base
Notice next higher column does increment until lesser right overflowed. Binary representation ideally suited where visual representation computer register data needed. Each column termed (from Binary digIT). Only five Bits shown above table. With larger numbers, more Bits required. Normally Bits arranged groups eight termed BYTES. definition there BITS BYTE. Each column) value. binary table above rightmost least significant column each digit value Each digit next column value next then following diagram illustrates this.
DECIMAL VALUE
determine decimal value binary pattern, decimal number each column containing binary "1".
DECIMAL VALUE BINARY NUMBER
above example shows binary pattern that equivalent Decimal. binary string defining Byte unwieldy. make less error prone, bits forming byte divided into groups bits, known NIBBLES. With four bits there
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Appendix
Numbering Systems
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possible numeric combinations (including zero). convenient method representing each nibble hexadecimal base system. When converting binary hex, byte divided into nibbles each represented single digit. This technique applied selection base address circuit board. following diagram illustrates construction number.
NIBBLE VALUE BINARY NUMBER
+-++-+ HEXADECIMAL: Hexadecimal upper nibble lower nibble resulting value Hex, since Decimal equals Hex.
Base Address Selection
Each column physically represented board pair pins. practice, boards cover range addresses (usually Decimal). Therefore order four bits included, higher order bits added. This gives address range following diagram shows typical pins.
Here link fitted denote binary logic "0", left open indicate binary logic "1". example shows base address setting Hex.
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Appendix
Maps
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Appendix MAPS PC/XT/AT Address
Address 000-01F 020-03F 040-05F 060-06F 070-07F 080-09F 0A0-0BF 0F8-0FF 1F0-1F8 200-207 278-27F 2F8-2FF 300-31F 360-36F 378-37F 380-38F 3A0-3AF 3B0-3BF 3C0-3CF 3D0-3DF 3F0-3F7 3F8-3FF Allocated Controller (8237A-5) Interrupt Controller (8259A) Timer (8254) Keyboard Controller (8742) Control Port CMOS RAM, Mask (Write) Page Register (Memory Mapper) Interrupt Controller (8259) Clear (80287) Busy Reset (80287) Numeric Processor Extension (80287) Hard Disk Drive Controller Reserved Reserved Parallel Printer Port Reserved Serial Port Reserved Reserved Parallel Printer Port Reserved SDLC Communications, Bisync Reserved Bisync Reserved Reserved Display Controller Diskette Drive Controller Serial Port
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Appendix
Maps
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PC/XT Interrupt
Number Allocated Parity Timer Keyboard Reserved Asynchronous Communications (Secondary) SDLC Communications Asynchronous Communications (Primary) SDLC Communications Fixed Disk Diskette Parallel Printer
PC/AT Interrupt
Level CTLR CTLR Allocated Parity Channel Check (Interrupt Controllers) Timer Output Keyboard (Output Buffer Full) Interrupt from CTLR Real-time Clock Interrupt Redirected (IRQ Reserved Reserved Reserved Co-processor Fixed Disk Controller Reserved Serial Port Serial Port Parallel Port Diskette Controller Parallel Port
Channels
Memory Refresh Spare Floppy Disk Drive Spare
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Appendix
Board Layout
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Appendix BOARD LAYOUT
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0127-1005
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