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Teledyne API T802 Paramagnetic O
2
Analyzer Operation Manual Principles of Operation
235
RELAY PCA
SENSOR SUITES
LOGIC DEVICES
(e.g. CPU, I
2
C bus,
Touchscreen,
MotherBoard, etc.)
ON / OFF
SWITCH
PS 2
(+12 VDC)
COOLING
FAN(S)
PUMP
AC HEATERS
PS 1
ANALOG
SENSORS
(e.g. Temp Sensor,
Pressure Sensor,
Flow Sensor)
Pre-Amplifiers
& Amplifiers
Solenoid
Drivers
AC POWER
DC POWER
AC
POWER IN
+5 VDC
±15 VDC
CO2 SENSOR PCA
(when optional CO2
sensor installed)
O
2
Sensor
OPTIONAL
CO2 SENSOR
Figure 12-13: Power Distribution Block Diagram
12.5.7. FRONT PANEL TOUCH SCREEN/DISPLAY INTERFACE
Users can input data and receive information directly through the front panel
touchscreen display. The LCD display is controlled directly by the CPU board.
The touchscreen is interfaced to the CPU by means of a touchscreen controller
that connects to the CPU via the internal USB bus and emulates a computer
mouse.
07275B DCN6418