2 Theory of Operation
1006-0836-000 02/03
2-9
2.4 Electronic and electrical components
2.4.1 The Aestiva 7100
ventilator functional
blocks
The Aestiva 7100 ventilator electronic/electrical subassemblies or modules
include:
•
a Power Supply for operation under line power
and a backup battery for limited operation in case of power failure;
•
a Control Board with digital, analog and power circuits to manage
all operations of the ventilator;
•
a Front Panel Assembly that includes an LCD display for display
of all ventilation and monitoring parameters
and a keyboard for operator input;
•
a Monitoring Interface Assembly to preprocess patient circuit
parameters and to channel the breathing system switch states;
•
a Serial Adapter Board to channel machine switch states and to
provide a RS232 serial output for external communication.
Figure 2-5 • Electronic functional block diagram as used in an Aestiva machine
Power
Cord
AC Inlet
System Breaker
Line Filter
Inside Machine
Fan
Universal
Power Supply
+6V @ 5A max
+9V @ 0.5A max
6 Volt
Battery
Control Board
MCF5206e ColdFire Processor
Memory and I/O Decoding
Flash, SRAM & EEPROM
SCR Circuitry
A/D – D/A Converter
Watchdog System
Inspiratory Valve Control (10 VA limited)
PEEP Valve Control (10 VA limited)
12 VDC Supply (10VA limited)
DC Supply Monitoring
Battery Management
Pneumatic Engine
Inspiratory Valve
PEEP Valve
Supply Pressure Switch
PEEP Safety Valve
Monitoring Interface
Assembly
Inspiratory Flow Transducers
Expiratory Flow Transducers
Breathing System
Flow Sensors
Bag/Vent Switch
Control Panel Switch
Canister Release Switch
Absorber Bypass Switch
Breathing Circuit ID
O2 Sensor
ACGO Switch
O2 Supply
Keyboard
Membrane
Switches
LCD Display
320 x 240
Control Module
O2 Flush
Machine/Ventilator
On/Standby switch
LCD Backlight
Rotary
Encoder
Switch
PEB
Airway
Pressure
Transducer
Speaker
Serial Adapter
Board
2 fuses
5mm x 20mm
T2L/250 V
RS232
AB.43.143
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