THEORY OF OPERATION Model 360E Instruction Manual

Analog Outputs
Sample Flow
& Pressure
Sensors
Status Outputs:
1 – 6
Control Inputs:
1 – 8

PC 104

CPU Card

Disk On
Chip
Flash Chip
RS–232
or RS-485
RS – 232
Power-Up
Circuit
Internal
Digital I/O
I
2
C
Bus
Sensor Inputs
Box
Temp
Thermistor
Interface
SAMPLE
TEMP
BENCH
TEMP
WHEEL
TEMP
A1
A2
A3
Optional
4-20 mA
MOTHER BOARD
A/D
Converter
(V/F)
PC 104 Bus
External
Digital I/O)
Back Panel
Connectors
Analog
Outputs
(D/A)
TEC Control
PHT
Drive
Detector
Output
Segment Sensor
M / R Sensor
GFC
Wheel
GFC
Motor
Zero/Span
Valve
Options
Wheel
Heater
Bench Heater
Keyboard &
Display

Sensor Status & Control

Optical

Bench

RELAY
BOARD
IR
Source
Photo-
detector

SYNC

DEMOD

C
O
M
E
A
S
C
O
R
E
F
CPU Status
LED
Schmidt
Trigger
PUMP
COM1 COM2
Optional
Ethernet
Interface
A4
Optional
O2 Sensor
O2 SENSOR
TEMP
(optional)

Figure 10-9: 360E Electronic Block Diagram

172 05232 Rev B3