Measurement Computing PCM-DAS08 Скачать руководство пользователя страница 5 | Manualshive

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Measurement Computing PCM-DAS08 Скачать руководство пользователя страница 5

1 INTRODUCTION

The PCM-DAS08 is a data acquisition and control board for IBM PC compatible
computers with PCMCIA-type slots. The heart of the board is an analog to digital
converter. Analog signals are routed to the A/D converter via an 8:1 multiplexer
controlled by a register. The analog input range is fixed at +/-5V but the board can be
ordered in custom ranges.

A/D conversions can be triggered by an on-board pacer clock, an external pacer input,
or software polling.

Digital I/O lines (three in and three out) provide a means of sensing and controlling
discrete events.

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Содержание PCM-DAS08

Страница 1: ...PCM DAS08 Analog Digital Inputs USER S MANUAL Revision 4 October 2000...

Страница 2: ...implication or otherwise under any patent or copyrights of Measurement Computing Corporation All rights reserved No part of this publication may be reproduced stored in a retrieval system or transmitt...

Страница 3: ...REGISTERS 7 5 I O ADDRESS MAP REGISTER FUNCTIONS 6 4 2 PACKAGED APPLICATIONS PROGRAMS 6 4 1 PROGRAMMING LANGUAGES 6 4 PROGRAMMING APPLICATIONS 5 3 4 BEWARE OF VOLTAGE SPIKES 5 3 3 GROUND LOOP EXAMPLE...

Страница 4: ...This page is blank...

Страница 5: ...alog signals are routed to the A D converter via an 8 1 multiplexer controlled by a register The analog input range is fixed at 5V but the board can be ordered in custom ranges A D conversions can be...

Страница 6: ...nnector which is inserted into the PCMCIA slot of your computer The KEY helps to insure that the PCM board is inserted in the correct orientation Figure 2 1 PCMCIA Connector If you are using an operat...

Страница 7: ...eld clips to either side of the 15 pins of the connector 3 1 CONNECTOR Figure 3 1 shows a PCM DAS08 card looking into the connector The KEY insures that the cable is inserted correctly Analog signals...

Страница 8: ...to avoiding potentials between signal grounds also avoid potentials between signal ground and chassis ground on your computer If you are using a laptop and are on battery power the computer is floatin...

Страница 9: ...p may not be grounded that does not mean that you can connect the PCM DAS08 to a signal that is subject to voltage spikes Even though the Laptop has no reference to ground it has more capacitive mass...

Страница 10: ...mming languages both DOS and Windows If you are planning to write programs or would like to run the example programs for Visual Basic or any other language please refer to the Universal Library manual...

Страница 11: ...re available in the Universal Library for DOS and Windows programming languages 5 2 REGISTER PROGRAMMING SUPPORT While the complete register map is explained here only very limited support for assembl...

Страница 12: ...the last value written if you want to change the A D channel and maintain the digital output lines at their current status There is no read back for the digital outputs Table 5 1 A D Channel Address C...

Страница 13: ...uts are not latched Each read gives the current status of the input lines A zero equals TTL low and a one equals TTL high MA2 to MA0 are the current A D channel addresses BASE 3 Trigger Source Pacer R...

Страница 14: ...umber of channels being sampled Table 5 2 shows the effects of number of channels selected on the per channel rate Table 5 2 Per Channel Rate Vs Number of Channels 0 39 0 78 1 56 3 13 8 0 45 0 89 1 79...

Страница 15: ...ed A D Trigger sources External polled digital input trigger DIn 2 active level determined by software A D Triggering Modes Digital Software polled digital input software enables acquisition when appr...

Страница 16: ...low voltage OIL 4 mA 0 32V max Output high voltage IOH 4 mA 3 86V min Absolute maximum input voltage 0 5V 5 5V Interrupts 2 to 15 Interrupt enable Programmable Interrupt sources External Ext Int falli...

Страница 17: ...ne end and no terminations at the other end for customer field wiring Table 7 1 contains color coding for the 15 pins Table 7 1 PCM C15 10 INCH Color Coding Bare SHIELD Yellow 8 Green Yellow 15 Orange...

Страница 18: ...For your notes 14...

Страница 19: ...documents EU EMC Directive 89 336 EEC Essential requirements relating to electromagnetic compatibility EU 55022 Class B Limits and methods of measurements of radio interference characteristics of info...

Страница 20: ...Measurement Computing Corporation 16 Commerce Boulevard Middleboro Massachusetts 02346 508 946 5100 Fax 508 946 9500 E mail info measurementcomputing com www measurementcomputing com...

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