Chapter 3 Functional Details; Pci-Das-Tc Block Diagram - Measurement Computing PCI-DAS-TS User Manual

Functional Details

PCI-DAS-TC Block diagram

PCI-DAS-TC functions are illustrated in the block diagram shown here.
External
DAS-TC
Screw Terminal
0
Screw
Terminal
15
CJC
(For CJC) +15ISO
Open
Thermocouple
Detection
Switches
Thermocouple
Input
Channels
Isolation
Barrier
Control
Signals
32-BIT, 33 MHz, 5V PCI BUS
Input
Connector
37
TC Input
Pin
Channel
Channels
0 - 15
CJC
AGND
+10V
+9.9V
Prec.
Ref
+5V ISO
DC/DC
+15V ISO
Converter
-15V ISO
Programmable
Logic
Control
Logic
Local
Control
Control
Registers
Address
Board
Select
Data
D0:7
PLX9050
PCI Interface
Figure 3. PCI-DAS-TC functional block diagram
Isolated Analog Input Section
Input AMP
20
Mux
Gain
Mux
Optical
Isolator
Optical
Isolator
SELECT:
CJC
Gain
Channel
Calibration
System +5
Dual Port
SRAM
Local BUS - Address, Data, Control
Data Bus
Transceiver
Processing and Control Section
12
Chapter 3
+10V Ref
V/F
Converter
Fout
CLK
IN
Optical Optical
Isolator Isolator
Oscillator
AM188
CPU
SRAM
Flash
EPROM