Measurement Computing CIO-DAS16/M1/16 Manual de usuario

CIO-DAS16/M1/16

High Speed Analog Inputs

& Digital I/O

User’s Guide

Revision 4

November, 2000

LIFETIME WARRANTY

Every hardware product manufactured by Measurement Computing Corp. is warranted against defects in

materials or workmanship for the life of the product, to the original purchaser. Any products found to be

defective will be repaired or replaced promptly.

LIFETIME HARSH ENVIRONMENT WARRANTYTM

Any Measurement Computing Corp. product which is damaged due to misuse may be replaced for only

50% of the current price. I/O boards face some harsh environments, some harsher than the boards are

designed to withstand. 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. By the

way, we will honor this warranty for any other manufacture’s board that we have a replacement for!

30 DAY MONEY-BACK GUARANTEE

Any Measurement Computing Corp. 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. Please call for a RMA number first. No credits or returns accepted

without a copy of the original invoice. Some software products are subject to a repackaging fee.

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 Corp., 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 Corp. has been notified in advance of the possibility of such damages.

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,InstaCal, Harsh Environment Warranty and Measurement Computing

Corp. are registered trademarks of Measurement Computing Corp.

IBM, PC, and PC/AT are trademarks of International Business Machines Corp. Windows is a trademark of

Microsoft Corp. All other trademarks are the property of their respective owners.

Information furnished by Measurement Computing Corp. is believed to be accurate and reliable. However,

no responsibility is assumed by Measurement Computing Corp. neither 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 otherwise under any patent or copyrights of Measurement Computing Corp.

transmitted, in any form by any means, electronic, mechanical, by photocopying, recording or otherwise

without the prior written permission of Measurement Computing Corp.

Notice

Measurement Computing Corp. does not authorize any Measurement Computing Corp.

product for use in life support systems and/or devices without the written approval of the

President of Measurement Computing Corp. Life support devices/systems are devices or

systems which, 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 Corp. 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 CIO-DAS16_M1_16.lwp

Table of Contents

7 SPECIFICATIONS ............................................................. 16

6 CALIBRATION AND TEST ..................................................... 155.10 82C55 DIGITAL I/O DATA AND CONTROL REGISTERS ........................... 145.9 8254 DATA AND CONTROL REGISTERS ......................................... 135.8 COUNTER, GAIN/RANGE CONTROL ............................................ 135.7 BURST LENGTH, EXTERNAL TRIGGER, CTR0/TRG0 .............................. 115.6 INTERRUPT AND PACER CONTROL REGISTER .................................. 115.5 STATUS REGISTER ........................................................... 105.4 8-BIT DIGITAL I/O REGISTERS ................................................. 105.3 CHANNEL MUX HI/LO LIMITS WORD REGISTER ................................. 95.2 A/D DATA WORD REGISTER .................................................... 95.1 DAS16/M1/16 REGISTER MAP ................................................... 9

5 REGISTER MAP ................................................................ 84.3 DIRECT REGISTER LEVEL PROGRAMMING ...................................... 84.2 FULLY INTEGRATED SOFTWARE PACKAGES (e.g. SoftWIRE) ....................... 84.1 CUSTOM SOFTWARE UTILIZING THE UNIVERSAL LIBRARY ...................... 8

4 SOFTWARE .................................................................. 63.6 DT-CONNECT ................................................................. 63.5 DIGITAL I/O CONNECTOR ...................................................... 53.4 DIGITAL OUTPUTS & INPUTS ................................................... 43.3.5 AVOID GROUND LOOPS .................................................... 43.3.4 FLOATING SIGNALS ....................................................... 33.3.3 GROUNDED SIGNAL SOURCE ............................................... 33.3.2 SHIELDING ............................................................... 33.3.1 KEEP HIGH AND LOW WIRES TOGETHER ..................................... 33.3 CONNECTING SIGNALS TO THE ANALOG INPUTS ................................. 33.2 ANALOG INPUTS .............................................................. 23.1 ANALOG CONNECTOR DIAGRAM ............................................... 2

3 SIGNAL CONNECTIONS ...................................................... 12.2 HARDWARE .................................................................. 12.1 SOFTWARE ................................................................... 1

2 INSTALLATION ................................................................ 1

1 INTRODUCTION ................................................................

This page is blank.

1 INTRODUCTION

CIO-DAS16/M1/16 sets the standard for high speed, 16-bit data acquisition boards for ISA bus compatible computers.

The board provides 8 fully differential input channels with a variety of software programmable input ranges. The

board will transfer a full 1 million samples per second to Measurement Computing’s MEGA-FIFO memory board, and

directly over the ISA bus when used in high speed (200 MHz+) Pentium™computers.

The board supports a variety of trigger modes. Triggers may be edge based on falling/rising or high/low states. The

board also provides 32-bits of digital I/O (24-bits CMOS, 8-bits TTL).

The CIO-DAS16/M1/16 is fully supported by the Universal Library®package which supplies a language interface for

all Windows and DOS based programming languages. The board includes the helpful InstaCal®installation, test and

calibration software package. The CIO-DAS16/M1/16 is also supported by a wide variety of third party data

acquisition and analysis software packages such as SoftWIRE.

2 INSTALLATION

2.1 SOFTWARE

The board has only one set of switches to set before installing the board in your computer. By far the simplest way to

configure your board is to use the InstaCalTM program provided as part of your software package. InstaCalTM will

show you any available options and how to configure the switches to match your application requirements. It 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 Software Installation Manual regarding the installation and operation of InstaCalTM. 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 InstaCalTM and/or your computer.

2.2 HARDWARE

BASE ADDRESS

Unless there is already a board in your system using address

300h, leave the switches as they are set at the factory.

In Figure 2-1 at right, the board is set at base address 300h.

Figure 2-1. Base Address Switches

HEX

200

100

987654

BASE ADDRESS SWITCH

- Address 300H shown here.

3 SIGNAL CONNECTIONS

There are two connectors on the CIO-DAS16/M1/16. The 37-pin connector which extends through the mounting plate

and extends out the rear of the PC is primarily for analog signals, and is referred to as the analog connector. The

40-pin header connector at the rear of the board carries the 24 digital I/O and is referred to as the digital connector.

3.1 ANALOG CONNECTOR DIAGRAM

The analog connector is a 37-pin, D-type connector, accessible from the rear of the PC through the expansion

backplate (Figure 3-1). With the exception of the missing D/A signals, the signals available are identical to the

CIO-DAS16.

The connector accepts female 37-pin, D-type connectors, such as those on the C73FF-2, a 2-foot cable with

connectors. If frequent changes to signal connections or signal conditioning is required, please refer to the information

on the CIO-TERMINAL or CIO-MINI37 screw terminal boards.

Figure 3-1. Analog Connector

EXT TRIG/GATE/DIG.IN 1

3.2 ANALOG INPUTS

Connect analog inputs to the board as shown in the following sections. Pay close attention to cabling and grounding

of the shield. Failure to cable as shown will likely result in signal noise.

CAUTION - PLEASE READ

TIP: Measure the voltage between the ground signal at the signal source and the PC. Use a volt meter and place the

red probe on the PC ground and the black probe on the signal ground. If there is more than 10 Volts, do not connect

to this signal source because you will not be able to make a valid reading. If the voltage is over 20 Volts, DO NOT

connect to this signal because it will damage the board and possibly the computer.

3.3 CONNECTING SIGNALS TO THE ANALOG INPUTS

Signal wiring should be done with consideration for the high speed sampling involved. Even if your A/D pacing rate

is not high, the converter is always converting in under 1uS and the internal MUX switching is done at similarly high

speeds. Close attention must be paid to how analog signals are connected to the board.

The CIO-DAS16/M1/16 has eight differential analog input channels. Each channel has a signal high input and a

signal low input. The measurement made by the A/D is the voltage difference between the LOW and HIGH inputs.

Differential inputs have a common mode range (see application note). The CIO-DAS16/M1/16 may have as much as

+11V or -6V of common mode between LLGND and signal LOW.

3.3.1 KEEP HIGH AND LOW WIRES TOGETHER

Keep the signal wires for a channel together. As a minimum, use twisted pair. This will reduce EMI or RFI noise on

your input signal.

3.3.2 SHIELDING

To further protect the input signals from noise, a use shielded wire. Shielded twisted pair is readily available. The

shield should be connected as shown in the diagrams below otherwise ground loops and signals noise may result.

3.3.3 GROUNDED SIGNAL SOURCE

A grounded signal source is defined as having the signal low referenced to chassis ground. If an instrument has only

two poles, HI and LOW, it is probably referenced to chassis ground internally. It is easy to check with an Ohmmeter

between LOW and the power cord ground prong. If an instrument has three poles, a HI, LOW and GND then you can

strap LO to GND as shown in Figure 3-2, or use the connection for Floating Signal Source.

Figure 3-2. Recommended Cabling Method

3.3.4 FLOATING SIGNALS

A floating signal source is defined as having the signal low with no reference to earth ground (PC Chassis ground or

LLGND). Examples are a battery, an isolated precision power supply or a sensor which is not earth grounded.

A reference between signal LOW and LLGND must be provided because the CIO-DAS16/M1/16 inputs are

differential. Failure to supply the reference resistor (10K) will result in unrepeatable readings (Figure 3-3).

Figure 3-3. Recommended Method for Connecting Floating Signals

Signal High

ignal Low

hannel # High

hannel # Low

Shielded Cable

Instrument

IO-DAS16/M1/16

Tie Low to GND

LGND

GROUNDED SIGNAL SOURCE - Suggested way to connect

signal and cable shield. Ground is completed through

power ground. Voltage between outlet grounds not to

exceed the common mode range.

Signal High

Signal Low

Channel # High

Channel # Low

hielded

able CIO-DAS16/M1/16

LGND

FLOATING SIGNAL SOURCE - Suggested way to connect signals

and cable shield. Connection is made to Earth ground through

power ground.

10K

3.3.5 AVOID GROUND LOOPS

Figure 3-4 shows the wrong way to connect a shielded cable. It creates a ground loop. Any current flowing between

grounds can interfere with your readings.

Figure 3-4. The Wrong Way to Connect a Shielded Cable

3.4 DIGITAL OUTPUTS & INPUTS

All the digital outputs and inputs on main I/O connector are TTL level. The binary logic inside the PC is all TTL or

LSTTL (Low power Schotky TTL).

If you desire to control or sense any device other than TTL IC chips, please use appropriate signal conditioning, such

as solid state relays or electromechanical relays. See the Measurement Computing catalog for SSR-RACK24 and

CIO-ERB24 interface accessories.

Signal High

Signal Low

hannel # High

hannel # Low

Shielded Cable

IO-DAS16/M1/16

LGND

WRONG WAY! - This is the wrong way to connect cable shield.

Ground Loop Created Here

Instrument

3.5 DIGITAL I/O CONNECTOR

A second connector at the rear of the board contains signals from an 82C55. These 24 bits of digital I/O are available

for on/off control, switch monitoring or other digital interface tasks. The connector and register alignment is identical

to that of the CIO-DIO24.

The 40-pin header (Figure 3-5) at the rear of the board is pinned out such that when connected to a 37-pin connector

via a BP40-37, the 37 pin connector's pinouts are identical to that of the CIO-DIO24. We recommend using a

BP40-37 to provide access to the 24 bits of digital I/O on the back panel

Figure 3-6 is the pin out of a BP40-37 when connected to the 40-pin digital connector.

Figure 3-5 Digital Connector Pinout Figure 3-6. BP40-37 Pinout

3.6 DT-CONNECT

There is no hardware configuration or installation required for DT-Connect. Software enables/disables DT-Connect,

and of course, you must have a DT-Connect equipped accessory board before using the DT-Connect.

3.6.1 DT-CONNECT IN MASTER MODE ONLY

The CIO-DAS16/M1/16 implements DT-Connect MASTER MODE only. DT-Connect is always enabled and is never

busy. The ENABLED and BUSY signal levels are fixed in hardware. Since DT-Connect is always enabled, any A/D

conversions are always transferred out the DT-Connect regardless of the bus transfer method specified. The

CIO-DAS16/M1/16 can only operate in DT-Connect schemes where it is the sole master.

To assure that DT-Connect is properly initialized prior to any A/D transfer, the DT-Connect DT-Request handshake

line is reset each time the programmable gain (Base + 11) register is written to. Therefore, it is not possible to use the

DT-Connect for A/D sets which involve setting the gain between samples. This is not really a problem because any

ORT B0

ORT B1

ORT B2

ORT B3

ORT B4

ORT B5

ORT B6

ORT B7

NC 40

NC 38

PORT A0 36

PORT A1 34

PORT A2 32

PORT A3 30

PORT A4 28

PORT A5 26

PORT A6 24

PORT A7 22

PORT C0 20

PORT C1 18

PORT C2 16

PORT C3 14

PORT C4 12

PORT C5 10

PORT C6 8

PORT C7 6

GND 4

+5V 2

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