RB8 Data Acquisition Card User Manual
Contents
1. 01270197 doc Page 7 Page 8 Electromagnetic Compatibility EMC 5 2 ELECTROMAGNETIC COMPATIBILITY EMC This product meets the requirements of the European EMC Directive 89 336 EEC and is eligible to bear the CE mark It has been assessed operating in a Blue Chip Technology Icon industrial PC However because the board can be installed in a variety of computers certain conditions have to be applied to ensure that the compatibility is maintained It meets the requirements for an industrial environment Class A product subject to those conditions e The board must be installed in a computer system which provides screening suitable for the industrial environment e Any recommendations made by the computer system manufacturer supplier must be complied with regarding earthing and the installation of boards e The board must be installed with the backplate securely screwed to the chassis of the computer to ensure good metal to metal i e earth contact e Most EMC problems are caused by the external cabling to boards It is important that any external cabling to the board is totally screened and that the screen of the cable connects to earth at both ends of the cable It is recommended that round screened cables with a braided wire screen are used in preference to those with a foil screen and drain wire With the terminal block connection to the card there is no space available for an earth point on the board mounting bracket It is re2. A to F It is also known as a system with the Base 16 With this counting system the units increment from 0 to 9 as with the decimal system but at the next count the units column increments from 9 to A and then B C and so on up to F After F the units column resets to 0 and the next column increments from 0 to 1 This indicates that sixteen counts have occurred in the units column The second column is termed the sixteen s column Page 10 01270197 doc Blue Chip Technology Ltd Appendix A Page 11 The following table shows how the three systems indicate successive numbers Decimal Binary Hexadecimal Base 2 Base 16 Notice how the next higher column does not increment until the lesser one to its right has overflowed Binary representation is ideally suited where a visual representation of a computer register or data is needed Each column is termed a BIT from Binary digIT Only five Bits are shown in the above table With larger numbers more Bits are required Normally Bits are arranged in groups of eight termed BYTES By definition there are 8 BITS per BYTE Each Bit or column has a value In the binary table above the rightmost or least significant column each digit has a value of 1 Each digit in the next column has a value of 2 the next 4 then 8 and so on The following diagram illustrates this B n v7 OUT hh cA 8 et at DECIMAL VALUE_ 128 64 32 16 5 fea gt Blue Chip Technology
3. Ltd 01270197 doc Page 11 Page 12 Appendix A To determine the decimal value of a binary pattern add up the decimal number of each column containing a binary 1 BIT No BTNo Zell 6 DECIMAL VALUE ts et o BINARY NUMBER The above example shows the binary pattern that is equivalent to 198 pecimal The binary string defining a Byte can be unwieldy To make it less error prone the 8 bits forming a byte are divided into two groups of 4 bits known as NIBBLES With four bits there are 16 possible numeric combinations including zero A convenient method of representing each nibble is to use the hexadecimal base 16 system When converting binary to hex the byte is divided into nibbles each represented by a single hex digit This technique is applied to the selection of the base address for the circuit board The following diagram illustrates the construction of a hex number BIT No NIBBLE VALUE BINARY NUMBER HEXADECIMAL C 6 Hexadecimal upper nibble 1x8 1x4 0x2 0x1D 12 lower nibble 0x 8 1x4 1x2 0x1 6 The resulting value is C6 pex since 12 pecima equals C pex Page 12 01270197 doc Blue Chip Technology Ltd Appendix A Page 13 Base Address Selection Each column can be physically represented on the board by a pair of pins In practice the boards cover a range of addresses usually 16 pecima Therefore the low order four bits are not included but two higher order bits are a
4. closed contacts at the output connector This selection is made by user selectable links The operating program can read back the status of the relay contacts thereby checking that the relay contact has actually operated as instructed The card occupies only one I O location which is both a read and write address A write to this location sets the desired relay s while a read from this address returns the contact status Connection to the card is by screw terminals which facilitates easy connection to the user Blue Chip Technology Ltd 01270197 doc Page 1 Page 2 Installation 2 0 INSTALLATION 2 1 Setting the Base Address The base address selection for the card is made by links on the header block JP9 There are ten address line selections on the block ranging from 200 pex to 001 pex Address 200 pex is at the left hand side of the jumper block An address line is selected if there is NO link present on the pins To select an address of 300 gx for example all links except 200 H and 100 H should be fitted The RB 8 card is set to 300 pgx prior to leaving the factory JP9 40 20 10 08 04 200 100 80 02 01 Diagram Showing Address Selector Header Example shows address 300 Hex 2 2 Setting the Relay Power on State The RB 8 can be set as to which contacts will power up in the normally open or normally close
5. RATION usa a a 3 3 1 Selecting a Relay By Software uesnsssssnnnsnnnnnnnennnnnnnnnnn nenn 3 3 2 Reading the Contact Status eeen eerren 3 4 0 USER CONNECTIONS 4444044424400nnnnnnnnnnnnnnnennnnnnnnnnnnnenn 5 5 0 SPECIFICATION un ae ae engere 6 HSIHLECHNICAalz ee ee ae east 6 5 2 ELECTROMAGNETIC COMPATIBILITY EMO 8 EMG SpeCIfCAtlom sans nee esinie 9 APPENDICES 4 aan einer 10 Appendix A NUMBERING SYSTEMS nneenennnn 10 Binary and Hexadecimal Numbers 244444ss444 nennen 10 Base Address Selection uusss44444nnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn 13 APPENDIX B PC MAPS ccccceeeeeeeeeeeeeeeeeeeeaeeeesecaeeeesenneeeeeees 14 PC XT AT I O Address Map 222444440Hnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn 14 PC XT Interrupt Map 24444ssnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn nn 15 PC AT Interrupt Map 44444sssnnnnsnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnannnnn nn 16 DMA Channels een 16 Blue Chip Technology Ltd 01270197 doc Introduction Page 1 1 0 INTRODUCTION The Blue Chip Technology RB 8 board provides the user with eight volt free contacts for use in general control applications The relay contacts will handle voltages up to mains potential at low currents or small voltages with a current handling up to 2 Amps The board has the facility to power up with various combinations of normally open and normally
6. RB 8 Eight Channel Relay Output Card Blue chf Technology User Manual RB 8 User Manual Document Part N 0127 0197 Document Reference RB 8 0127 0197 Doc Document Issue Level 2 2 Manual covers PCBs identified RB 8 Rev B All rights reserved No part of this publication may be reproduced stored in any retrieval system or transmitted in any form or by any means electronic mechanical photocopied recorded or otherwise without the prior permission in writing from the publisher For permission in the UK contact Blue Chip Technology Information offered in this manual is correct at the time of printing Blue Chip Technology accepts no responsibility for any inaccuracies This information is subject to change without notice All trademarks and registered names acknowledged Blue Chip Technology Ltd Chowley Oak Tattenhall Chester Cheshire CH3 9EX Telephone 01829 772000 Facsimile 01829 772001 Amendment History Issue Issue Amendment Details Level Date 12 4 95 2 1 28 2 96 EGW Addition of EMC information to Technical Specification new front sheet Errors corrected Doc ref was RB81040 Filename was RB 8 doc Part number added 2 2 09 12 97 SEJ Window front cover and logo See ECN 97 144 Contents 1 0 INTRODUCTION een 1 Z0 INSTALLAT O N inre 4 0 RR 2 2 1 Setting the Base Address 0 cceeeeceeeeeeeeeeeeeeeeneteeeeeeeeeeeeetaaaes 2 2 2 Setting the Relay Power on State 2 3 0 OPE
7. commended that the screen be connected to the metal body of the PC and hence earth by the shortest possible pig tail The BCT Icon chassis has these available adjacent to the expansion area Unscreened cable will not be adequate unless it is contained wholly within the cabinetry housing the industrial PC and carefully routed Page 8 01270197 doc Blue Chip Technology Ltd Electromagnetic Compatibility Page 9 e To ensure that the board meets the industrial radiated field immunity of 10 V metre the cable should also be fitted with a ferrite clamp on the external cable as close possible to the connector The preferred type is the Chomerics clip on style type H8FE 1004 AS e Ensure that the screen of the external cable is bonded to a good RF earth at the remote end of the cable Failure to observe these recommendations may invalidate the EMC compliance Warning This is a Class A product In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures EMC Specification A Blue Chip Technology Icon industrial PC fitted with this card meets the following specification Emissions EN 55022 1995 Radiated Class A Conducted Class A amp B Immunity pr EN 50082 2 1991 incorporating Electrostatic Discharge TEC 801 2 1984 Performance Criteria A Radio Frequency Susceptibility TEC 801 3 1984 Performance Criteria A Fast Burst Transients IEC 801 4 1988 Perfor
8. d state on an individual contact basis This selection is made by the handbag type links on the card Each link consists of three positions the middle one of each being the common pin The pins to either side of the common pin are marked NO and NC normally open and normally closed To set a particular contact pair to say normally open place a link between the common centre pin and the pin marked NO Each set of relay contacts should be set to the required state prior to installing the card into the host computer Page 2 01270197 doc Blue Chip Technology Ltd Operation Page 3 3 0 OPERATION 3 1 Selecting a Relay By Software Switching the relays by software is a matter of writing the correct bit pattern to the base address The following BASIC example demonstrates this assuming that the base address is set to 300 pgx 10 INPUT SELECT RELAY TO SWITCH gt RS 20 IF RS 0 THEN VALUE 0 rem all relays off 30 IF RS 1 THEN VALUE 1 rem bit 0 40 IF RS 2 THEN VALUE 2 rem bit 1 50 IF RS 3 THEN VALUE 4 rem bit 2 60 IF RS 4 THEN VALUE 8 rem bit 3 70 IF RS 5 THEN VALUE 16 rem bit 4 80 IF RS 6 THEN VALUE 32 rem bit 5 90 IF RS 7 THEN VALUE 64 rem bit 6 100 IF RS 8 THEN VALUE 128 rem bit 7 110 OUT amp H300 VALUE rem send value to switch relay on 150 GOTO 10 This simple program allows single relays to be switch on and serves to illustrate the relationship between a single relay and its corresponding bit in t
9. dded This gives an address range of 0 to 3F0 mex The following diagram shows a typical set of pins BASE A ee Bone Po o lO lol lo lo 200 100 80 40 20 10 Here a link is fitted to denote a binary or logic 0 or left open to indicate a binary or logic 1 The example shows a base address setting of 300 tex Blue Chip Technology Ltd 01270197 doc Page 13 Page 14 Appendix B APPENDIX B PC MAPS PC XT AT I O Address Map Address 000 01F 020 03F 040 05F 060 06F 070 07F 080 09F OAO OBF OFO OF1 OF8 OFF 1FO 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 Page 14 Allocated to DMA Controller 1 8237 A 5 Interrupt Controller 1 8259 A Timer 8254 Keyboard Controller 8742 Control Port B RTC and CMOS RAM NMI Mask Write DMA Page Register Memory Mapper Interrupt Controller 2 8259 Clear NPX 80287 Busy Reset NPX 80287 Numeric Processor Extension 80287 Hard Disk Drive Controller Reserved Reserved for Parallel Printer Port 2 Reserved for Serial Port 2 Reserved Reserved Parallel Printer Port 1 Reserved for SDLC Communications Bisync 2 Reserved for Bisync 1 Reserved Reserved Display Controller Diskette Drive Controller Serial Port 1 01270197 doc Blue Chip Technology Ltd Appendix B Page 15 PC XT Interrupt Map Number Allocat
10. ed to NMI Parity 0 Timer 1 Keyboard 2 Reserved 3 Asynchronous Communications Secondary SDLC Communications 4 Asynchronous Communications Primary SDLC Communications 5 Fixed Disk 6 Diskette 7 Parallel Printer Blue Chip Technology Ltd 01270197 doc Page 15 Page 16 Appendix B PC AT Interrupt Map Level Allocated to CPU NMI Parity or I O Channel Check CTLR1 CTLR2 Interrupt Controllers IRQ 0 Timer Output 0 IRQ 1 Keyboard Output Buffer Full IRQ 2 Interrupt from CTLR 2 IRQ 8 Real time Clock Interrupt IRQ 9 S w Redirected to INT OAH IRQ 2 IRQ 10 Reserved IRQ 11 Reserved IRQ 12 Reserved IRQ 13 Co processor IRQ 14 Fixed Disk Controller IRQ 15 Reserved IRQ 3 Serial Port 2 IRQ4 Serial Port 1 IRQ5 Parallel Port 2 IRQ 6 Diskette Controller IRQ7 Parallel Port 1 DMA Channels 0 Memory Refresh 1 Spare 2 Floppy Disk Drive 3 Spare Page 16 01270197 doc Blue Chip Technology Ltd
11. he value sent to the card Since each relay is controlled by an individual bit within the data sent to the card any one or any number of relays can be switched on or off simply by writing the correct bit pattern to the board s base address 3 2 Reading the Contact Status The RB 8 card permits the user to read back in software the status of each relay contact This is not a signal generated from a logic holding register but a logic level produced by a second contact set This allows a software program to test the physical status of the contacts to test for relay failure Blue Chip Technology Ltd 01270197 doc Page 3 Page 4 Operation The relay status is determined by a software read to the board address The following example illustrates this 120 RSTAT INP amp H300 rem read relay address 130 RNUM 255 RSTAT determine relay number active LOW 140 PRINT RELAY CURRENTLY OPERATED RNUM These two programs may be combined to demonstrate a relay Set and confirmatory Read operation Page 4 01270197 doc Blue Chip Technology Ltd Connections Page 5 4 0 USER CONNECTIONS The user connections to the card are made by pins on the connector or optional screw terminals at the rear of the board These terminals may carry voltages up to mains potential therefore care must be exercised Using voltages as high as this on the rear of a PC card is not generally to be recommended Pin Contact 6 Be 9 Connectio
12. mance Criteria A Blue Chip Technology Ltd 01270197 doc Page 9 Page 10 Appendix A APPENDICES Appendix A NUMBERING SYSTEMS Binary and Hexadecimal Numbers The normal numbering system is termed DECIMAL because there are ten possible digits 0 to 9 in any single column of numbers Decimal numbers are also referred to as numbers having a Base 10 When counting the numbers increment in the units column from 0 up to 9 The next increment resets the units column to 0 and carries over 1 into the next column This 1 indicates that there has been a full ten the base number counts in the units column The second column is therefore termed the tens column It is more convenient when programming to use a number system that provides a clearer picture of the hardware at an operational or register level The two most common number systems used are BINARY and HEXADECIMAL These two systems provide an alternative representation to decimal numbers For a binary number there are only 2 possible values 0 or 1 and as a result binary numbering is often known as Base 2 When counting in binary numbers the number increments the units column from 0 to 1 At the next increment the units column is reset to 0 and 1 is carried over to the next column This column indicates that a full two counts have occurred in the units column Now the second column is termed the twos column Hexadecimal numbers may have 16 values 0 to 9 followed by the letters
13. n Pinouts Note Pin 1 is left hand most connection nearest to the edge connector Blue Chip Technology Ltd 01270197 doc Page 5 Page 6 5 0 SPECIFICATION Specification Eight channel relay contact closure opening upon software command Contact status read back operating on actual contacts not control bits Contacts individually selectable for Normally Open NO or Normally Closed NC state at power up 5 1 Technical Relay Contact Specifications Maximum Contact Carry Current Maximum Switching Current Maximum Recommended Voltage Maximum Contact Power Rating Contact Bounce Time Contact Response Time Contact Resistance Contact Life operations Power Consumption Address Overhead Read Write Connections To Card Page 6 01270197 doc See graph on following page 3 Amp 2 Amp DC 1 Amp AC 125 Volts DC 100 Volts AC 60 VA 600 Watts Make 0 5 mSec Break 0 5 mSec Make 5 mSec Break 5 mSec 50 mOhm Electrical 500 000 At Full Load Mechanical 50 000 000 1 8 Watts maximum All Relays On 1 Address 16 Way Male Connector Additional Plug In Screw Connector Available Blue Chip Technology Ltd Specification Page 7 Maximum Carrying Current Maximum Switching Current DC CONTACT CURRENT Amps Max Switching Current AC 0 50 100 150 200 250 CONTACT VOLTAGE Diagram Showing Relay Contact Rating Hatched area indicates recommended maxima Blue Chip Technology Ltd
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