Measurement-computing PCI-DAS-TC Manuel d'utilisateur télécharger pdf (Page 12)

Chapter 3

Functional Details

PCI-DAS-TC Block diagram

PCI-DAS-TC functions are illustrated in the block diagram shown here.

Dual Port

SRAM

AM188

CPU

Control

Logic

Control

Registers

Flash

EPROM

Local BUS - Address, Data, Control

Programmable

Logic

Data

D0:7

Board

Select

Processing and Control Section

Oscillator

System +5

Isolation

Barrier

DC/DC

Converter

SELECT:

CJC

Gain

Channel

Calibration

Fout

CLK

V/F

Converter

+10V Ref

Gain

Mux

Input AMP

Channel

Mux

+10V

Prec.

Ref

+5V ISO

+15V ISO

-15V ISO

Input

Connector

+9.9V

CJC

AGND

TC Input

Channels

0 - 15

Screw

Terminal

CJC

Open

Thermocouple

Detection

Switches

External

DAS-TC

Screw Terminal

(For CJC) +15ISO

Thermocouple

Input

Channels

Isolated Analog Input Section

32-BIT, 33 MHz, 5V PCI BUS

PLX9050

PCI Interface

Control

Signals

Local

Control

Address

Data Bus

Transceiver

SRAM

Optical

Isolator

Optical

Isolator

Optical

Isolator

Optical

Isolator

Figure 3. PCI-DAS-TC functional block diagram

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 18 19 20

PCI-DAS-TC 2
HM PCI-DAS-TC.doc 3
Table of Contents 5
About this User's Guide 6
Introducing the PCI-DAS-TC 7
Installing the PCI-DAS-TC 8
Unpacking the PCI-DAS-TC 9
Installing the software 9
Configuring the PCI-DAS-TC 10
Figure 2. C37FFS-x cable 11
Functional Details 12
Theory of operation 13
Processing and control 14
Process flow 14
Specifications 15
CIO-STA-TC adapter 16
Calibration error 16
Miscellaneous 16
Crystal oscillator 16
Linearity error 17
Power consumption 17
Environmental 17
Main connector and pin-out 17
Declaration of Conformity 19

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