BlueChip ADC-42 Manuale utente
ADC-42
Digital and Analogue
Input/Output Module
User Manual
ADC-42
User Manual
Document Part N°0127-1014
Document Reference ADC-42\..\0127-1014.Doc
Document Issue Level 1.0
Manual covers PCBs identified ADC-42 Revision 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
Level Issue
Date Author Amendment Details
0.3 10.1.92 I.S First issue.
1.0 SEJ Window front cover and logo. See ECN
98/087
Contents
Blue Chip Technology Ltd. 01271014.doc
INTRODUCTION................................................................................1
1.0 SPECIFICATION..........................................................................1
1.1 Electrical Specification............................................................1
1.2 Physical Specification .............................................................2
Electromagnetic Compatibility (EMC).............................................2
EMC Specification .........................................................................3
2.0 USER ADJUSTMENTS................................................................4
2.1 Selecting the Base Address......................................................4
2.2 Port Map..................................................................................5
3.0 INPUT CONNECTIONS...............................................................6
Pin Detail.......................................................................................6
3.1 Pin Connections......................................................................7
4.0 USING THE ADC.........................................................................7
4.1 Analogue Inputs .......................................................................7
4.1.1 Analogue Input Options........................................................8
4.1.2 Example Program ...............................................................14
4.2 Analogue Outputs...................................................................15
4.3 Programmable Digital I/O......................................................16
4.4 Interrupts................................................................................21
APPENDIX A ...................................................................................24
APPENDIX B ...................................................................................26
PC/XT/AT Port Map .....................................................................26
APPENDIX C ...................................................................................28
PC/XT Interrupt Map....................................................................28
APPENDIX D ...................................................................................29
AT Interrupt Map..........................................................................29
Introduction
Blue Chip Technology Ltd. 01271014.doc
INTRODUCTION
The ADC card is a versatile 12 bit input and output subsystem, having both
analogue and digital capability.
The card can provide:
1. 24 Digital inputs or outputs.
2. 2 Channels of analogue output.
3. 16 Channels of single-ended analogue input.
or
8 Channels of differential analogue input.
4. Interrupt generator.
Specification Page 1
Blue Chip Technology Ltd. 01271014.doc Page 1
1.0 SPECIFICATION
1.1 Electrical Specification
i. Analogue Input
Number of channels 16 Single Ended
or 8 Differential
Resolution 12 Bit
Conversion Time 10 Microseconds
Input Ranges (uni-polar) 0-5V or 0-10V
Input Ranges (bi-polar) +/-2.5V, +/-5V, +/-10V
(Link Selectable)
Maximum Input Voltage 12V
ii. Analogue Output.
Number of Channels 2
Resolution 12 Bit
Output Range 0-10V
Maximum Load Current 5mA DC
iii. Programmable Digital I/O
Number of Channels 24
High Logic Levels 2.4V to 5.5V
Low Logic Levels 0V to 0.8V
Max Sink Current (Output) 1.7mA @ 0.45V
Max Source Current (0 & 3) -200uA @ 2.4V
Max Source Current (1, 2 & 4, 5) -1mA @ 2.4V
iv. Power Requirement
Power Requirement 5V DC @ 300mA
+/-12V @ 50mA
Power Dissipation 2.25W
Page 2Specification
Page 2Blue Chip Technology Ltd. 01271014.doc
1.2 Physical Specification
Height 107mm
Width 15mm
Depth 132mm
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.
• The board must be installed in a computer system which provides screening
suitable for the industrial environment.
• Any recommendations made by the computer system manufacturer/supplier
must be complied with regarding earthing and the installation of boards.
• 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.
• Most EMC problems are caused by the external cabling to boards. Analogue
boards fitted with IDC ribbon cable connectors on the metal mounting
bracket require particularly careful installation of the external cabling. It is
imperative that any external cabling to the board is totally screened, and that
the screen of the cable connects to the metal end bracket of the board and
hence to earth. The cabling must be totally screened; the type of ribbon
cable which is rolled to a round form with a braided wire screen is best.
Standard ribbon cable will not be adequate unless it is contained wholly
within the cabinetry housing the industrial PC. Keep the unscreened section
as short as possible. The mounting bracket of the board includes a captive
nut as an screen earth point. Connect the screen of the cable to this by the
shortest possible wire.
Indice
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