Word Pro - HM PC104
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1. 6 10 Switch 1 200h 512d and switch 7 08 2 100h 256d Added together they equal 300h 768 decimal Figure 3 1 Base Address Switches 300h Shown Certain addresses are used by the PC others are free and may be used by the PC104 DI48 and other expansion boards We recommend that BASE 300h 768D be tried first Refer to Table 3 1 below for PC I O addresses 2 Table 3 1 I O Addresses HEX FUNCTION HEX FUNCTION RANGE RANGE 000 00F 8237 DMA 1 2C0 2CF EGA 020 021 8259 PIC 1 2D0 2DF EGA 040 043 8253 TIMER 2E0 2E7 GPIB AT 060 063 8255 PPI XT 2E8 2EF SERIAL PORT 060 064 8742 CONTROLLER AT 2F8 2FF SERIAL PORT 070 071 CMOS RAM amp NMI MASK AT 300 30F PROTOTYPE CARD 080 08F DMA PAGE REGISTERS 310 31F PROTOTTYPE CARD 0A0 0A1 8259 PIC 2 AT 320 32F HARD DISK XT OA0 0AF NMI MASK XT 378 37F PARALLEL PRINTER OCO ODF 8237 2 AT 380 38F SDLC OFO OFF 80287 NUMERIC CO P AT 3A0 3AF SDLC 1F0 1FF HARD DISK AT 3B0 3BB MDA 200 20F GAME CONTROL 3BC 3BF PARALLEL PRINTER 210 21F EXPANSION UNIT XT 3C0 3CF EGA 238 23B BUS MOUSE 3D0 3DF CGA 23C 23F ALT BUS MOUSE 3E8 3EF SERIAL PORT 270 27F PARALLEL PRINTER 3F0 3F7 FLOPPY DISK 2B0 2BF EGA 3F8 3FF SERIAL PORT The PC104 DI48 BASE switch may be set for address in the range of 000 3FC so it should not be hard to find a free a2. This page is blank 1 0 INTRODUCTION The PC104 DI48 is designed to have the best quality and lowest cost of any digital input board The PC104 DI48 conforms to the connector pin specification of all the PC104 DIO48 digital boards and CIO Dxx48 96 and 192 family digital boards so may be used in place of one another without changing cabling or connectors These products are supported by Universal Library programming library 2 0 SOFTWARE INSTALLATION The board has a variety of switches and jumpers to set before installing the board in your computer By far the simplest way to configure your board is to use the InstaCal program provided as part of your software package InstaCal will show you all available options how to configure the various switches and jumpers as applicable to match your application requirements and will create a configuration file that your application software and the Universal Library will refer to so the software you use will automatically know the exact configuration of the board Please refer to the Extended Software Installation Manual regarding the installation and operation of InstaCal The following hard copy information is provided as a matter of completeness and will allow you to set the hardware configuration of the board if you do not have immediate access to InstaCal and or your computer Details for setting of the switches are in the following section 3 0 HARDWARE INSTALLATION 3
3. buffer that senses eight input pins The ports are arranged in sets of three with an intervening N A not used address area This scheme allows compatibility with software written to control 82C55 based boards when the 82C55 is used as all inputs On those boards every fourth address contains a control register The first address or BASE ADDRESS is determined by setting the base address switches on the board To read data from an input register a byte is read representing the status of all eight digital input lines The individual bits are decoded as a 0 or a 1 Data read from registers must be analyzed to determine which bits are on or off The registers and their function are listed on the following table Each register has eight bits of data ADDRESS READ FUNCTION WRITE FUNCTION BASE 0 Port 1A Data None BASE 1 Port 1B Data None BASE 2 Port 1C Data None BASE 3 None BASE 4 Port 2A Data None BASE 5 Port 2B Data None BASE 6 Port 2C Data None BASE 7 None PORTS IA and 2A DATA BASE ADDRESS 0 and 4 7 6 5 4 3 2 1 0 A7 A6 A3 A4 A3 A2 Al A0 PORTS IB and 2B DATA BASE ADDRESS 1 and 5 7 6 5 4 3 2 1 0 B7 B6 B5 B4 B3 B2 B1 BO PORTS IC and 2C DATA BASE ADDRESS 2 and 6 7 6 5 4 3 2 1 0 C7 C6 C5 C4 C3 C2 CI CO POWER CONSUMPTION 5V Supply 12V Supply 12V
4. volts when off and 24 volts when on you cannot connect that directly to a digital input The voltage must be dropped to 5 volts max when on The attenuation is 24 5 or 4 8 Using the equation above if R2 is IK R1 4 8 1 x 1000 3 8K Remember that a TTL input is on when the input voltage is greater than 2 5 volts NOTE The resistors RI and R2 are going to dissipate power in the divider circuit according to the equation W P x R Current D Voltage Resistance The higher the value of the resistance R1 R2 the less power dissipated by the divider circuit Here is a simple rule For attenuation of lt 5 1 no resistor should be less than 10K For attenuation of 5 5 1 no resistor should be less than IK 7 4 LOW PASS FILTERS DE BOUNCE INPUTS A low pass filter is placed on the signal wires between a signal and an A D board It prevents frequencies greater than the cut off frequency from entering the A D board s digital inputs The cut off frequency is that frequency above which no variation of voltage with respect to time may enter the circuit For example if a low pass filter had a cut off frequency of 30 Hz the kind of interference associated with line voltage 60 Hz would be mostly filtered out but a signal of 25 Hz would pass with less attenuation Also in a digital circuit a low pass filter is often used to remove contact bounce noise signals from a switch or a relay contacts A simple low pass filter can be c
5. 1 BOARD SETUP The PC104 DI48 is setup at the factory with BASE ADDRESS 300h 768 decimal Open your PC after turning off the power and install the board Leave the address switches as they were set at the factory or refer to the information below to change the settings After the board is installed and the computer is closed up turn power on PC104 DI48 is a dedicated 48 line digital input board built up of logic chips There are no control registers The input pins present a single LSTTL load 3 2 BASE ADDRESS The PC104 DI48 employs the PC bus for power communications and data transfer As such it draws power from the PC monitors the address lines and control signals and responds to it s I O address It receives and places data on eight data lines Base address is the most important user selectable item of the PC104 DI48 The base address is the starting location that software reads from when communicating with the PC104 DI48 DIP switches Figures 3 1 and 4 2 are used to set the base address 0 Each switch position corresponds to one of the PC bus address lines By placing the switch down the address decode logic adds that value to the base address A base address is constructed by SW HEX calculating the HEX or decimal 1 200 number which will be the address T2 3049 BF 2 100 the board will respond to For fi i a a a m 3 80 example in Figure 3 1 switches MWA i i 4 40 and 2 are down all others are up 5 20
6. PC104 D148 User s Manual Wa N Ya AV Da MEASUREMENT COMPUTING Revision 3 September 2000 Your new Measurement Computing product comes with a fantastic extra Management committed to your satisfaction Thank you for choosing a Measurement Computing product and congratulations You own the finest and you can now enjoy the protection of the most comprehensive warranties and unmatched phone tech support It s the embodiment of our mission To provide data acquisition hardware and software that will save time and save money Simple installations minimize the time between setting up your system and actually making measurements We offer quick and simple access to outstanding live FREE technical support to help integrate MCC products into a DAQ system Limited Lifetime Warranty Most MCC products are covered by a limited lifetime warranty against defects in materials or workmanship for the life of the product to the original purchaser unless otherwise noted Any products found to be defective in material or workmanship will be repaired replaced with same or similar device or refunded at MCC s discretion For specific information please refer to the terms and conditions of sale Harsh Environment Program Any Measurement Computing product that is damaged due to misuse or any reason may be eligible for replacement with the same or similar device for 50 of the current list price I O boards face some harsh environments some h
7. Supply DIGITAL INPUT Digital Type Configuration Number of channels Input High Input Low Miscellaneous ENVIRONMENTAL Operating Temperature Storage Temperature Humidity 6 0 SPECIFICATIONS 250 mA typical 325 mA max None None Input 74LS373 6 banks of 8 bits each input only 48 inputs 2 0 volts min 7 volts absolute max 0 8 volts max 0 5 volts absolute min Locations provided for installation of pull up or pull down resistors 0 to 70 C 40 to 100 C 0 to 90 non condensing 7 0 ELECTRONICS AND INTERFACING This short introduction to the electronics most often needed by digital I O board users covers a few key concepts 7 1 UNCONNECTED INPUTS FLOAT Unconnected inputs will float If you are using the PC104 DI48 board for input and have unconnected inputs ignore the data from those lines For example if you connect bit AO and not bit Al do not be surprised if Al stays low stays high or tracks AO It is unconnected and so is unspecified The input buffer is not malfunctioning In the absence of a pull up pull down resistor any input to a PC104 DI48 which is unconnected is unspecified You do not have to tie input lines and unconnected lines will not affect the performance of connected lines Just make sure that you mask out any unconnected bits in software An alternative to masking inputs is to define the state of unused inputs by using pull up or pull down resistors There are locations on
8. acing to high voltages The most convenient way to use solid state relays is to purchase a Solid State Relay Rack SSR Racks are available from Measurement Computing Corp 7 3 VOLTAGE DIVIDERS An alternative method of measuring a signal which varies over a range greater than the input range of a digital input is to use a voltage divider When correctly designed it can drop the voltage of the input signal to a safe level the digital input can accept Ohm s law states Voltage Current x Resistance Kirkoff s law states The sum of the voltage drops around a circuit will be equal to the voltage drop for the entire circuit In a voltage divider the voltage across one resistor in a series circuit is proportional to the total resistance divided by the one resistor see formula below The object in a voltage divider is to choose two resistors having the proportions of the maximum voltage of the input signal to the maximum allowed input voltage The formula for attenuation is Attenuation R1 R2 R2 For example if the signal varies between 0 and 20 2 10K 10K volts and you wish to measure that with an analog 10K input with a full scale range of O to 10 volts the attenuation A is 2 1 or just 2 R1 A 1 x R2 For a given attenuation pick a resistor and call it R2 the use this formula to calculate R1 Digital inputs often require the use of voltage dividers For example if you wish to measure a digital signal that is at 0
9. arsher than the boards are designed to withstand Contact MCC to determine your product s eligibility for this program 30 Day Money Back Guarantee Any Measurement Computing Corporation product may be returned within 30 days of purchase for a full refund of the price paid for the product being returned If you are not satisfied or chose the wrong product by mistake you do not have to keep it These warranties are in lieu of all other warranties expressed or implied including any implied warranty of merchantability or fitness for a particular application The remedies provided herein are the buyer s sole and exclusive remedies Neither Measurement Computing Corporation nor its employees shall be liable for any direct or indirect special incidental or consequential damage arising from the use of its products even if Measurement Computing Corporation has been notified in advance of the possibility of such damages Trademark and Copyright Information Measurement Computing Corporation InstaCal Universal Library and the Measurement Computing logo are either trademarks or registered trademarks of Measurement Computing Corporation Refer to the Copyrights amp Trademarks section on mecdag com legal for more information about Measurement Computing trademarks Other product and company names mentioned herein are trademarks or trade names of their respective companies 2000 Measurement Computing Corporation All rights reserved No part of thi
10. ddress area for you PC104 DI48 If you are not using IBM prototyping cards or some other board which occupies these addresses then 300 3 1F HEX are free to use Addresses not specifically listed such as 390 39F are not reserved and may be available Check your computer for other boards which may use I O addresses 4 0 CABLING 4 1 INTRODUCTION The PC104 DI48 connector is a standard 50 pin header connector Figure 4 2 A cable with mating connectors C50FF can be purchased from Measurement Computing Corporation 4 2 CONNECTOR DIAGRAM The PC104 DI48 connector is a 50 pin header type connector GND 45V PC1 BIT 0 ee PC1 BIT 1 PC1 BIT 2 PC1 BIT 3 PC1 BIT 4 0 PC1 BIT 5 PC1 BIT 6 0 PC1 RIT 7 PB1 BITO ee PBI BIT 1 PB1 BIT 2 eo PB1Bi13 PORT1 PB1 BIT 4 ee ppipits BASE 0 1 2 PB1 BIT 6 ee PB1 BIT7 PAI BIT O ee PAI BIT 1 PAI BIT 2 0o PA BIT 3 PAI BIT 4 ee PA1 BIT 5 PAI BIT 6 ee PAI BIT7 PE2BITO 24 23 PCBT U PC2 BIT 2 ee PC2 BIT 3 PC2 BIT 4 ee PC2 BIT 5 PC2 BIT 6 ee PC2 BIT 7 PB2 BIT 0 PB2 BIT 1 PB2 BIT 2 PB2BIT3 PORT PB2 BIT 4 ee PB2 BIT 5 BASE 4 5 6 PB2 BIT 6 ee PB2 BIT 7 PA2 BIT 0 8o PA2 BIT 1 PA2 BIT 2 ee PA2 BIT 3 PA2 BIT 4 ee PA2 BIT 5 PA2 BIT6 ee PA2 BIT 7 Figure 4 1 50 Pin Connector BASE ADDRESS SWITCHES Figure 4 2 Base Address Switches and Pin 1 Locations 5 0 DATA REGISTERS Each PC104 DI48 is composed of parallel input chips Each address has one input
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12. onstructed from one resistor R and one capacitor C The cut off frequency is determined according to the formula Fe 1 Where T 3 14 27RC R ohms C farads R 1 Fc cut off frequency in cycles second 2n C Fe 10 EC Declaration of Conformity We Measurement Computing Corp declare under sole responsibility that the product Part Number Description PC104 D148 Digital input board to which this declaration relates meets the essential requirements is in conformity with and CE marking has been applied according to the relevant EC Directives listed below using the relevant section of the following EC standards and other normative documents EU EMC Directive 89 336 EEC Essential requirements relating to electromagnetic compatibility EU 55022 Class B Limits and methods of measurements of radio interference characteristics of information technology equipment EN 50082 1 EC generic immunity requirements IEC 801 2 Electrostatic discharge requirements for industrial process measurement and control equipment IEC 801 3 Radiated electromagnetic field requirements for industrial process measurements and control equipment IEC 801 4 Electrically fast transients for industrial process measurement and control equipment Carl Haapaoja Director of Quality Assurance Measurement Computing Corporation 10 Commerce Way Suite 1008 Norton Massachusetts 02766 508 946 5100 Fax 508 946 9500 E mail inf0
13. s publication may be reproduced stored in a retrieval system or transmitted in any form by any means electronic mechanical by photocopying recording or otherwise without the prior written permission of Measurement Computing Corporation Notice Measurement Computing Corporation does not authorize any Measurement Computing Corporation product for use in life support systems and or devices without prior written consent from Measurement Computing Corporation Life support devices systems are devices or systems that a are intended for surgical implantation into the body or b support or sustain life and whose failure to perform can be reasonably expected to result in injury Measurement Computing Corporation products are not designed with the components required and are not subject to the testing required to ensure a level of reliability suitable for the treatment and diagnosis of people HM PC104 DI48 lwp Table of Contents 1 0 INTRODUCTION 2 0 SOFTWARE INSTALLATION 3 0 HARDWARE INSTALLATION 3 1 BOARD SETUP 3 2 BASE ADDRESS 4 0 CABLING 4 1 INTRODUCTION 4 2 CONNECTOR DIAGRAM 5 0 DATA REGISTERS 6 0 SPECIFICATIONS 7 0 ELECTRONICS AND INTERFACING 7 1 UNCONNECTED INPUTS FLOAT 000000 ce aes 7 2 TTL TO SOLID STATE RELAYS 00 0o 7 3 VOLTAGE DIVIDERS 7 4 LOW PASS FILTERS DE BOUNCE INPUTS
14. the board for installation of these resistors marked RN1 through RN6 The location associated with FIRST PORT A the port at Base 0 is RN1 The location for FIRST PORT B the port at Base 1 is RN2 FIRST PORT C Base 2 is RN3 SECOND PORT A Base 4 is RN4 SECOND PORT B Base 5 is RN5 SECOND PORT C Base 6 is RN6 A 10Kohm eight resistor SIP has all its resistors connected on one end to a single common pin The common pin is marked with a dot and is at one end of the SIP The other ends connect to eight in line pins The SIP can be installed to pull up or pull down At each location there are 10 holes in a line One end of the line is marked HI the other end LO The eight holes in the middle are connected to the eight lines of a port A B or C To pull up lines orient the SIP with the common pin dot in toward the HI end to pull down install the resistor with the common pin in the LO hole Carefully solder the SIP in place A resistor value of 10K is recommended Use other values only if you have determined the necessity for doing so 7 2 TTL TO SOLID STATE RELAYS Many applications require digital inputs monitor AC and DC voltages High AC and DC voltages cannot be applied directly by the TTL digital lines Solid State Relays such as those available from Measurement Computing Corp allow control and monitoring of high AC and DC voltages and provide 400V isolation Solid State Relays SSRs are recommended for interf
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