Measurement-computing CIO-DAS08-PGH User Manual

CIO-DAS08-PGHCIO-DAS08-PGMCIO-DAS08-PGLAnalog Input & Digital I/O.Revision 9October, 2000

3.1.2 Differential InputsDifferential inputs measure the voltage between two distinct input signals. Within a certain range (referred to as the common

Before moving on to the discussion of grounding and isolation, it is important to explain the concepts of common mode, andcommon mode range (CM Range)

If you measure reasonably stable AC and DC voltages, your system has an offset voltage between the grounds category. Thisoffset is referred to as a Co

3.1.9 Board and Signal Source Have Isolated GroundsSome signal sources will already be electrically isolated from the board. Figure 3-4 shows a typic

3.2.2 Common Ground / Differential InputsThe use of differential inputs to monitor a signal source with a common ground is a acceptable configuration

3.2.5 Common Mode Voltage > +/-10V The CIO-DAS08-PGx will not directly monitor signals with common mode voltages greater than +/-10V. You will ei

3.2.6 Isolated Grounds / Single-Ended InputsSingle-ended inputs can be used to monitor isolated inputs, though the use of the differential mode will i

4: REGISTER ARCHITECTURE 4.1 CONTROL & DATA REGISTERSThe CIO-DAS08-PGx is controlled and monitored by writing to and reading from eight consec

4.2 A/D DATA REGISTERBASE ADDRESS (Read / Write)0000A/D12 LSBA/D11A/D10A/D901234567READOn read, it contains the least significant four digits of the

MUX 2 to MUX 0 is the current multiplexer channel. The current channel is a binary coded number between 0 and 7 .WRITE = CONTROLBASE + 2 (Read / Writ

© Copyright 2000 Measurement Computing Corp.HM CIO-DAS08PGx.lwpYour new Measurement Computing product comes with a fantastic extra — Management commit

There are fewer ranges available for the CIO-DAS08-PGL. Gains of 2, 4 & 8 are often called binary gains. These ranges are notavailable on the Met

4.5 COUNTER LOAD & READ REGISTERSCOUNTER 0BASE ADDRESS + 4 (Read / Write)D0D1D2D3D4D5D6D701234567COUNTER 1BASE ADDRESS + 5 (Read / Write) D0D1D2D3

BCD = 1 then counter data is 4-decade Binary Coded Decimal. (9,999 max)4.7 COUNTER/TIMER The 82C54 counter/timer chip (Figure 4-1) may be used for eve

4.8 DIGITAL INPUTThe digital inputs are simple TTL level lines. They feed into an 8-bit register which has other on-board signals fed into it. Theres

4.10 TRIGGER & INTERRUPT LOGICThe trigger logic on the CIO-DAS08-PGx is quite simple. Pin 24 of the 37 pin connector is an input to a flip-flop wh

5: SPECIFICATIONS Power consumption+5V: 900 mA typical, 1125 mA maxAnalog input sectionA/D converter type AD574Resolution 12 bitsNumber of channe

Counter sectionCounter type 82C54Configuration 3 down-counters, 16 bits eachCounter 0 - independent, user configurableSource: user connector (Counter

EC Declaration of ConformityWe, Measurement Computing Corp., declare under sole responsibility that the product:DescriptionPart NumberCIO-DAS08-PGxto

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TABLE OF CONTENTS215: SPECIFICATIONS ...204.10 TRIGGER & INTERRUP

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1: INTRODUCTION There are three versions of the CIO-DAS08-PGx board, CIO-DAS08-PGL, CIO-DAS08-PGH and CIO-DAS08-PGM. (TheCIO-DAS08-PGM duplicates

1.2 HARDWARE INSTALLATION1.2.1 Base AddressThe base address of the CIO-DAS08-PGx is set by switching a bank of DIPswitches on the board (Figure 1-1).

The following table shows some typical interrupt assignments on a PC. The CIO-DAS08-PGx use interrupt levels 2 through 7.The levels most often availa

2: SIGNAL CONNECTION 2.1 CONNECTOR DIAGRAMThe analog connector is a 37-pin, D-type connector accessible from the rear ofthe PC through the expansi

3: ANALOG CONNECTIONS 3.1 ANALOG INPUTSPrior to jumping into actual connection schemes, you should have at least a basic understanding of Single-Ended