ComputerBoards CIO-DAS801 Manual Download Page 5

1:  INSTALLATION

1.1  INTRODUCTION

This manual covers two boards, the CIO-DAS801 and the CIO-DAS802.  These two boards are identical except for the programmable
input ranges available.  The CIO-DAS802 offers more choices in the range from 10 volts to 0.625 volts, but the CIO-DAS801 offers a
wider range of choices from 10 volts down to 0.01 volts.

This manual will refer to both boards as CIO-DAS80# except in cases where these differences apply.

1.2  SOFTWARE INSTALLATION

Before you open your computer and install the board, install and run InstaCal, the installation, calibration and test utility included with
your board. InstaCal will guide you through switch and jumper settings for your board. Detailed information regarding these settings
can be found below. Refer to the Software Installation manual for InstaCal installation instructions.

1.3  HARDWARE INSTALLATION

There are two banks of switches and two jumpers to set on the CIO-DAS80# before installing your board into your computer.

1.

BASE ADDRESS SWITCH.  A base address must be chosen and selected via on-board switches.

2.

INPUT SELECT SWITCHES.  Analog inputs are differential or single-ended.  You may choose either on a channel-by-channel
basis.  The set of DIP switches on the board, labeled S2, 0 through 7, correspond to the channels 0 to 7 of the analog inputs.

3.

INTERRUPT SELECT JUMPER.  In order to take advantage of high speed transfers, you must provide the board with an inter-
rupt that is not used by other devices in your computer.  Use the IR jumper to select an interrupt level between 2 and 7 or to dis-
able interrupts (X).

4.

WAIT STATE JUMPER.  A wait state jumper allows you to slow down a (future) computer bus that is too fast for the board. 
(We have not seen the need for it yet.)  Set jumper WSt to “ON” to enable wait states.

1.3.1 BASE ADDRESS
The base address of the CIO-DAS80# is set by switching a bank of DIP
switches on the board (Figure 2-1).  This bank of switches is labeled ADDRESS
and numbered 9 to 3. Refer to the Software Installation Manual for instructions
for using InstaCal as an aid in setting the base address switches.

Ignore the word ON and the numbers printed on the switch.

The address is derived by the software adding up the weights of individual
switches to yield a base address.  A 'weight' is active when the switch is down.
Shown to the right, switches 9 and 8 are down, all others are up.  Weights 200H
and 100H are active, equaling 300H base address. Refer to Table 2-1 for PC I/O
addresses.

Figure 1-1. Base Address Select

Switches

1

Summary of Contents for CIO-DAS801

Page 1: ...CIO DAS801 802 ComputerBoards Inc Revision 2 October 1999...

Page 2: ...responsibility is assumed by ComputerBoards Inc for its use nor for any infringements of patents or other rights of third parties which may result from its use No license is granted by implication or...

Page 3: ...erential Inputs 9 2 2 3 Common Mode Voltage Less Than 10V Single Ended Inputs 9 2 2 2 Common Ground Differential Inputs 8 2 2 1 Common Ground Single Ended Inputs 8 2 2 WIRING CONFIGURATIONS 6 2 1 4 De...

Page 4: ...This page intentionally left blank...

Page 5: ...choose either on a channel by channel basis The set of DIP switches on the board labeled S2 0 through 7 correspond to the channels 0 to 7 of the analog inputs 3 INTERRUPT SELECT JUMPER In order to ta...

Page 6: ...the ability to reject noise which affects both signal high and low and the ability to compensate for ground loops or potentials between signal low and chassis ground Although differential inputs are o...

Page 7: ...2 for typical IRQ assignments Figure 1 4 IRQ Level Select Switches Table 1 2 IRQ Assignments Note IRQ8 15 are AT only LPT IRQ7 UNASSIGNED IRQ15 FLOPPY DISK IRQ6 HARD DISK IRQ14 HARD DISK XT LPT AT IR...

Page 8: ...2 Common Mode voltage on Single Ended Input 2 1 2 Differential Inputs Differential amplifiers amplify the voltage between two distinct input signals Within a certain range referred to as the common m...

Page 9: ...difference between 100V and 101V as 1 Volt because 100V would destroy the board This limitation or common mode range is depicted graphically in Figure 2 5 The common mode range is 10 Volts Even in di...

Page 10: ...PC Place one voltmeter probe on the PC ground and the other on the signal source ground Measure both the AC and DC Volt ages If you do not have access to a voltmeter skip the test and read the followi...

Page 11: ...voltage my be AC DC or both and may be caused by a wide array of phenomena including EMI pickup resistive voltage drops in ground wiring and connections etc Ground offset voltage is a more appropriat...

Page 12: ...n Ground Recommendation Input Configuration Ground Category The following sections have recommended input wiring schemes for input configuration grounding combinations 2 2 1 Common Ground Single Ended...

Page 13: ...ed Inputs This configuration is not recommended Here the term common mode has no meaning in a single ended system and this case would be better described as a system with offset grounds In any case tr...

Page 14: ...D C H H igh C H Low Signal Source with Com m on M ode Voltage Signal source and A D board with com m on m ode voltage connected to a differential input GND The voltage differential between these groun...

Page 15: ...inputs Figure 2 11 shows the recommended connections for this configuration Figure 2 11 Isolated Signal Source Connected to a Differential Input 11 Isolated Signal Source Connected to a Single Ended I...

Page 16: ...rces The manner of configuring the analog inputs and the schematic of those configurations is explained earlier in the manual This section covers the implications of a given connection and shows how t...

Page 17: ...CIO DAS80 are TTL level TTL is an electronics industry term short for Transistor Transis tor Logic with describes a standard for digital signals which are either at TTL low or TTL high levels which a...

Page 18: ...sal Library routines To write to or read from a register in decimal or hexadecimal the following weights apply 80 128 7 40 64 6 20 32 5 10 16 4 8 8 3 4 4 2 2 2 1 1 1 0 HEX VALUE DECIMAL VALUE BIT POSI...

Page 19: ...D2 D3 D4 D5 D6 D7 Register Write Functions Data Bits Function Table 3 2 Control Register Select Coding ID Register Not defined 1 1 Status Register 2 Scan Limits Reg 0 1 Status Register 2 Conversion C...

Page 20: ...Base 3 Base 7 8254 C T 2 Status Register Base 6 8254 C T 1 Status Register Base 5 8254 C T 0 Status Register Base 4 Gain Control Status R0 R1 R2 R3 MA0 MA1 MA2 EACS Base 3 Status Register 1 MA0 MA1 M...

Page 21: ...le Range Select Disable W CSE Register Selection See Table 3 2 W CS1 0 Cascade AD Pacing Mode Enable include CT 2 RW CASC Analog data input Read low byte first R AD 11 0 Table 3 6 Special Programming...

Page 22: ...ee counters two are dedicated to the pacing of analog to digital conversions These two CTR1 and CTR2 when not in use by the A D are available for other tasks but are limited to some extent by the wiri...

Page 23: ...r Interrupt or software polled from 256 sample FIFO buffer Polarity Unipolar Bipolar programmable Channel configuration Differential or pseudo differential with installation of a SIP resistor or singl...

Page 24: ...e selectable Clock input frequency 10 Mhz max High pulse width clock input 30 ns min Low pulse width clock input 50 ns min Gate width high 50 ns min Gate width low 50 ns min Input low voltage 0 8V max...

Page 25: ...irective 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...

Page 26: ...ComputerBoards Inc 16 Commerce Blvd Middleboro MA 02346 Tel 508 946 5100 Fax 508 946 9500 www computerboards com...

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