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Omega Engineering CIO-DAC08 manual

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Table of contents for the manual

  • Page 1

    CIO-DAC16 and CIO-DAC08 User’s Manual Revision 4 October, 2000[...]

  • Page 2

    MEGA-FIFO, the CIO prefix to data acquisition board model numbers, the PCM prefix to data acquisition board model numbers, PCM-DAS08, PCM-D24C3, PCM-DAC02, PCM-COM422, PCM-COM485, PCM-DMM, PCM-DAS16D/12, PCM-DAS16S/12, PCM-DAS16D/16, PCM-DAS16S/16, PCI-DAS6402/16, Universal Library , Insta Cal, Harsh Environment Warranty and Measurement Computing C[...]

  • Page 3

    Table of Contents 12 5 SPECIFICATIONS ............................................ 9 4.1 Control & Data Registers ..................................... 9 4 ARCHITECTURE .............................................. 8 3.10 Connector Diagram ......................................... 7 3.9 Signal Connection .......................................[...]

  • Page 4

    This page is blank.[...]

  • Page 5

    1 INTRODUCTION The CIO-DAC16 is a 16 channel analog output board. The CIO-DAC08 is an eight channel analog output board. The analog outputs are dual-DAC AD7273s with each output buffered by an OP07. The CIO-DAC family is compatible with MetraByte's DDA-06 but lacks digital outputs. Software designed for the DDA-06 will operate the analog outpu[...]

  • Page 6

    3 HARDWARE INSTALLATION 3.1 Initial Board Setup The CIO-DAC## has one bank of gain switches for each analog output channel, one base address switch, a simultaneous update jumper for each DAC pair, a “power-up state” selection jumper and one wait state jumper block which must be set before installing the board in your computer. The Insta Cal cal[...]

  • Page 7

    Table 3-1. PC I/O Addresses SERIAL PORT 3F8-3FF EGA 2B0-2BF FLOPPY DISK 3F0-3F7 PARALLEL PRINTER 270-27F SERIAL PORT 3E8-3EF ALT BUS MOUSE 23C-23F CGA 3D0-3DF BUS MOUSE 238-23B EGA 3C0-3CF EXPANSION UNIT (XT) 210-21F PARALLEL PRINTER 3BC-3B B GAME CONTROL 200-20F MDA 3B0-3BB HARD DISK (AT) 1F0-1FF SDLC 3A0-3AF 80287 NUMERIC CO-P (AT) 0F0-0FF SDLC 3[...]

  • Page 8

    3.3 Wait State Jumper The CIO-DAC## boards have a wait state jumper which can enable an on-board wait state generator. A wait state is an extra delay injected into the processor's clock via the bus. This delay slows down the processor when the processor addresses the CIO-DAC## board so that signals from slow devices (chips) will be valid. Figu[...]

  • Page 9

    . Figure 3-3. Simultaneous Update Jumper 3.5 Analog Output Range Switches The analog output voltage range of each channel can be set with a set of five ganged DIP switches. The switch blocks are located on the board below the calibration potentiometers. The switch blocks are labeled 0 to 15 (0 to 7 on the CIO-DAC08) and individual switches are labe[...]

  • Page 10

    To set a channel to a particular range, read the switch positions as UP or DN (down) from left to right in the row beside the range you desire. For example, the ±5V range is: UP>DN>DN>UP>DN. 3.6 Installing the CIO-DAC## in the Computer Turn the power off. Remove the cover of your computer. Please be careful not to dislodge any of the c[...]

  • Page 11

    3.9 Signal Connection The analog outputs of the CIO-DAC## are two-wire hookups. A signal, labeled D/A # OUT on the connector diagram below, and a Low Level Ground (LLGND). The low level ground is an analog ground and is the ground reference which should be used for all analog hookups. Possible analog output ranges are: 0 to 2.5V 0 to 5V 0 to 10V Un[...]

  • Page 12

    3.10 Connector Diagram The CIO-DAC## connector is a 37-pin D-type connector accessible from the rear of the PC through the expansion backplate. The connector accepts female 37-pin D type connectors, such as those on the C37FF-2, 2 foot cable with connectors. If frequent changes to signal connections or signal conditioning is required, refer to the [...]

  • Page 13

    4 REGISTER ARCHITECTURE The CIO-DAC## is a simple board to understand. All control and data is read/written with simple I/O read and write commands. No interrupt or DMA control software is required. Thus, the board's functions are easy to control directly from BASIC, C or PASCAL. 4.1 Control & Data Registers The CIO-DAC16 has 32 analog out[...]

  • Page 14

    In summary form, the registers and their function are listed in the following table. Each register has eight bits which can constitute a byte of data or eight individual read/write functions. The CIO-DAC08 has 8 pairs of register (Base + 0 through Base + 15) and the CIO-DAC16 has 16 pairs of register (Base + 0 through Base + 31). Table 4-2. Registe[...]

  • Page 15

    4.2 Output Transfer Functions To program a DAC, you must select the output you desire in volts, then apply a transfer function to that value. The transfer function for code = output is: The UNIPOLAR transfer function of the DAC is: FSV / 4096 * CODE = OutV or CODE = OutV / FSV * 4096 For Example: If the range is 0 to 5V, and you desire a 2V output [...]

  • Page 16

    5 SPECIFICATIONS POWER CONSUMPTION CIO-DAC16 +5V supply 435 mA typical, 525 mA m ax +12V supply 140 mA typical, 180 mA m ax − 12V supply 80 mA typical, 105 mA max CIO-DAC08 +5V supply 435 mA typical, 525 mA m ax +12V supply 75 mA typical, 98 mA max − 12V supply 52 mA typical, 68 mA m ax ANALOG OUTPUT D/A type AD7237 Resolution 12 bits Number of[...]

  • Page 17

    Update DACs individually or simultaneously (jumper-selectable by pairs) DAC output state on power up and reset undefined ENVIRONMENTAL Operating temperature range 0 to 70°C Storage temperature range − 40 to 100°C Humidity 0 to 90% non-condensing 13[...]

  • Page 18

    For your notes. 14[...]

  • Page 19

    EC Declaration of Conformity 8 Channel analog output board CIO-DAC08 16 Channel analog output board CIO-DAC16 Description Part Number 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 follo[...]

  • Page 20

    OMEGA Engineering Inc. One OMEGA Drive , Stamford , Ct 06801 ( 800 ) 872-9436 E-mail: info@ omega .com www. omega .com[...]