1. Manuals
  2. Brands
  3. Measurement Computing Manuals
  4. Control Systems
  5. CIO-DAS1401/12
  6. User manual

Measurement Computing CIO-DAS1401/12 User Manual

Data acquisition & control boards
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
Measurement Computing CIO-DAS1401/12 User Manual

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the CIO-DAS1401/12 and is the answer not in the manual?

Questions and answers

Summary of Contents for Measurement Computing CIO-DAS1401/12

  • Page 1 Artisan Technology Group is your source for quality new and certified-used/pre-owned equipment SERVICE CENTER REPAIRS WE BUY USED EQUIPMENT • FAST SHIPPING AND DELIVERY Experienced engineers and technicians on staff Sell your excess, underutilized, and idle used equipment at our full-service, in-house repair center We also offer credit for buy-backs and trade-ins •...
  • Page 2 CIO-DAS1401/12, CIO-DAS1402/12, CIO-DAS1402/16 Data Acquisition & Control Boards User’s Manual Revision 7 November, 2000 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 3 When that happens, just return the board with an order for its replacement at only 50% of the list price. Measurement Computing Corp. does not need to profit from your misfortune.

  • Page 4: Table Of Contents

    9.1 CIO-DAS1401/12 and CIO-DAS1402/12 ........
  • Page 5 This page is blank Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 6: Introduction

    The installation and operation of all three of the CIO-DAS1400 series boards is very similar. Throughout this manual we use CIO-DAS1400 as a generic designation for the CIO-DAS1401/12, CIO-DAS1402/12 and CIO-DAS1402/16. When required due to the differences in the boards, the specific board name is used.

  • Page 7: Dma Level Select

    DMA LEVEL SELECT DMA level 1 or 3 may be selected. The default level is level 1 (Figure 3-2). There are other boards that use DMA levels. Some network boards do and so do some IEEE-488 interface boards. Check to see if you have other boards in your computer that use DMA channels 1 or 3.

  • Page 8: Pacer Edge Select

    PACER EDGE SELECT The original Keithley MetraByte DAS-1600 was designed such that A/D conversion was initiated on the falling (trailing) edge of the convert signal from the internal pacer. Neither the original DAS-16, TRIGGER EDGE SELECT nor any of the other DAS-16 derivations convert on the falling edge. We are not aware of any A/D JUMPER BLOCK Falling Edge A/D Trigger board that uses the falling edge to initiate the A/D conversion.

  • Page 9: Connector Pinouts

    4 CONNECTOR PINOUTS The CIO-DAS1400 analog connector is a 37-pin, “D”-connector accessible from the rear of the PC on the expansion back plate. The signals available are identical to the DAS-16, or optionally, an additional signal, SS&H OUT (Simultaneous Sample & Hold), is available at pin 26.

  • Page 10: Analog Connections

    5 ANALOG CONNECTIONS ANALOG INPUTS Analog signal connection is one of the most challenging aspects of applying a data acquisition board. If you are an electrical engineer you may wish to skip this section, but for many PC data acquisition users, the best way to connect your analog inputs may not be obvious.
  • Page 11 C H H igh C H H igh In p u t To A /D A m p Inp ut To A /D C H L ow A m p V cm C H L ow LL G N D V cm = V g 2 - V g 1 D iffe re n tia l LL G N D...

  • Page 12: System Grounds And Isolation

    SYSTEM GROUNDS and ISOLATION There are three possibilities when connecting a signal source to the CIO-DAS1400 board: The CIO-DAS1400 and the signal source may have the same (or common) ground. This signal source can be connected directly to the board. The CIO-DAS1400 and the signal source may have an offset voltage between their grounds (AC and/or DC).

  • Page 13: Wiring Configurations

    stays within +/-10V), This input is compatible with the CIO-DAS1400 and the system may be connected without additional signal conditioning. Fortunately, most systems fall in this category and have a small voltage differential between grounds. 5.2.5 Large Common Mode Voltages If the ground differential is large enough, the board’s +/- 10V common mode range will be exceeded (i.e.

  • Page 14: Common Ground / Differential Inputs

    using a differential input to measure a common ground signal source. However the reverse is not true. Figure 5-4 is a connection diagram for a common ground / single-ended input system. C H IN In p ut To A /D A m p LL G N D O ptional w ire...

  • Page 15: Common Mode Voltage, Greater Than +/-10V

    C H H igh G N D Inp ut To A /D A m p C H L ow LL G N D T he voltag e d ifferen tial A /D B o a rd be tw een th ese grounds , C o nn ector ad de d to th e m a xim um inp ut sign al m ust stay...

  • Page 16: Isolated Grounds / Single-Ended Inputs

    5.3.6 Isolated Grounds / Single-Ended Inputs Single-ended inputs can be used to monitor isolated inputs, though the use of the differential mode will increase you system’s noise immunity. The diagram below shows the recommended connections is this configuration. CH IN Inp ut To A /D A m p...

  • Page 17: Register Architecture

    CUSTOM SOFTWARE UTILIZING THE UNIVERSAL LIBRARY Most customers write custom software using Measurement Computing’s Universal Library. The Universal Library takes care of all the board I/O commands and lets you concentrate on the application part of the software. For additional information regarding using the Universal Library, please refer to the documentation supplied with the Universal Library FULLY INTEGRATED SOFTWARE PACKAGES (e.g.

  • Page 18: A/D Data & Channel Registers

    The registers and their functions are listed in Table 6-1. Each register has eight bits for either a byte of data or individual bit functions. Table 6-1. Register Addresses and Functions ADDRESS READ FUNCTION WRITE FUNCTION BASE A/D Data (Least significant four bits) Start A/D Conversion BASE + 1 A/D Data (Most significant byte)

  • Page 19: A/D Data & Channel Registers (Cio-Das1402/16)

    6.2.2 A/D Data & Channel Registers (CIO-DAS1402/16) BASE ADDRESS A/D 7 A/D 6 A/D 5 A/D 4 A/D 3 A/D 2 A/D 1 A/D 0 This register is read/write. READ On read, it contains the least significant eight digits of the analog input data. These eight bits of analog input data are combined with the eight bits of analog input data in BASE + 1, forming a complete 16-bit number.

  • Page 20: Status Registers

    BASE ADDRESS +3 (when written to) WRITE The upper four bits are ignored. The lower four bits are latched TTL outputs. Once written, the state of the inputs cannot be read back because a read back would read the separate digital input lines (see above). NOTE Since the digital inputs have multiple functions, use the digital input lines 0-3 with care when you are also using the A/D converter.

  • Page 21: Pacer Clock Control Register

    Table 6-2. Interrupt Coding INTERRUPT LEVEL None None DMA = 1, DMA transfers are enabled. DMA = 0, DMA transfers are disabled. Note that this bit only allows the CIO-DAS1400 to assert a DMA request to the PC on the DMA request level selected by the DMA switch on the CIO-DAS1400.

  • Page 22: Programmable Gain Control Register / Burst Rate

    PROGRAMMABLE GAIN CONTROL: Range and gain is controlled by bits G1 and G0. The codes have different meaning for each board in the DAS1400 family. Table 6-4. Range Control Codes BOARD CODE BIPOLAR RANGE UNIPOLAR RANGE CIO-DAS1401/12 +/-10V 0-10V +/-1V 0-1V +/-0.1V 0-0.1V +/-0.01V...

  • Page 23: Pacer Clock Data & Control Registers

    6.2.9 Pacer Clock Data & Control Registers 8254 COUNTER 0 DATA BASE ADDRESS +C hex 8254 COUNTER 1 DATA BASE ADDRESS +D hex 8254 COUNTER 2 DATA BASE ADDRESS +E hex The three 8254 counter/timer data registers are read/write. Because each counter can count as high as 64,535, it is clear that loading or reading the counter data is a multi-step process.

  • Page 24: Das1400 Mode Enable Register

    6.2.12 DAS1400 Mode Enable Register BASE ADDRESS +406 hex WRITE ONLY. DAS1400 mode enable. Writing 40 hex to this register enables the DAS1400 functions. Writing 0 to this register disables DAS1400 functions. On power-up or reset the DAS1400 functions are disabled. 6.2.13 Burst Status Register BASE ADDRESS + 407 hex READ ONLY.

  • Page 25: Analog Electronics

    8 ANALOG ELECTRONICS VOLTAGE DIVIDERS If you need to measure a signal whos span is greater than the input span of an analog or digital input, use a voltage divider to drop the voltage of the input signal to fall within the range values of the analog or digital input. A voltage divider takes advantage of Ohm's law, which states, Voltage = Current * Resistance ( V = I * R) and Kirkoff's voltage law which states,...

  • Page 26: Low-Pass Filters

    For attenuation greater than 5:1, no resistor should be less than 1K. The CIO-TERMINAL has the circuitry on board to create custom voltage dividers. The CIO-TERMINAL is a 16" by 4" screw terminal board with two 37 pin D type connectors and 56 screw terminals (12 - 22 AWG). Designed for table top, wall or rack mounting, the board provides prototype, divider circuit, filter circuit and pull-up resistor positions which you may complete with the proper value components for your application.

  • Page 27: Specifications

    9 SPECIFICATIONS CIO-DAS1401/12 and CIO-DAS1402/12 Analog Input Section A/D converter type ADS7800 successive-approximation Resolution 12 bits (1 in 4096) Programmable ranges CIO-DAS1401/12 ±10V, ±1V, ±0.1V, ±0.01V, 0 to 10V, 0 to 1V, 0 to 0.1V, 0 to 0.01V CIO-DAS1402/12 ±10V, ±5V, ±2.5V, ±1.25V, 0 to 10V, 0 to 5V, 0 to 2.5V, 0 to 1.25V...

  • Page 28: Cio-Das1402/16

    Counter Section Counter type 82C54 Configuration 3 down-counters, 16 bits each Counter 0 - Independent, user configurable Source: Programmable - Internal 100kHz or external (CTR0 Clock In) Gate: External (DIn2) Output: Available at user connector (CTR0 Out) Counter 1 - ADC Pacer Lower Divider Source: 1 or 10 MHz oscillator (jumper selectable) Gate: Tied to Counter 2 gate, programmable source.
  • Page 29 Integral Linearity error (Bipolar) ±1.5 LSB No missing codes guaranteed 16 bits Gain drift (A/D specs) ±7 ppm/°C Zero drift (A/D specs) ±2 ppm/°C Input leakage current 250 nA max Input impedance 10 MegOhms min Absolute maximum input voltage ±35V Digital Input / Output Digital Type Output...
  • Page 30 EC Declaration of Conformity We, Measurement Computing Corp., declare under sole responsibility that the product: CIO-DAS1400 ISA Bus, analog and digital I/O boards series Part Number Description 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.
  • Page 31 Measurement Computing Corporation 16 Commerce Boulevard, Middleboro, Massachusetts 02346 (508) 946-5100 Fax: (508) 946-9500 E-mail: info@measurementcomputing.com www. measurementcomputing.com Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 32 Artisan Technology Group is your source for quality new and certified-used/pre-owned equipment SERVICE CENTER REPAIRS WE BUY USED EQUIPMENT • FAST SHIPPING AND DELIVERY Experienced engineers and technicians on staff Sell your excess, underutilized, and idle used equipment at our full-service, in-house repair center We also offer credit for buy-backs and trade-ins •...

This manual is also suitable for:

Cio-das1402/12Cio-das1402/16

Table of Contents