Datex-Ohmeda S/5 Avance Technical Reference Manual page 329

Figure 11-6 • System block diagram (sheet 2 of 2)
1009-0357-000 11/03
Electronic
Atmel Microcontroller
Mixer Assy
Sh1
Bal Gas Bal Gas Bal Gas
ADC Ref
Prop Flow Temp
Check
Vlv Sense Sense
Air N2O
Sel Valve Sel Valve Sel Valve
Sh1
Sh1
Sh1
Vent
Engine
Connector
Board
ABS
Filter Bd
ACGO Solenoid
O2-Flush SW
ACGO/SCGO SW
Total Total
Total
Flow Flow
p sense
t sense Sense
O2 O2
O2 Prop
Flow Temp
Vlv
Sense Sense
O2 O2 Byp
Sel Valve
+12.5V Accessory Power
+12.5V Valve Power
Exp Data
+12.5V
I 2 C MUX
Insp Data
to Flow Sensors
E 2 Clk
+5.0VA
Filter
E 2 +5.0V
+5.0VDD
+5V
E 2 GND
Reg.
+6.0VA
Bag/Vent Sw
-6.0VA
O2 Flush Sw
Emulator
Activity Indicators
Header
O2 Disconnect
Reset, Watchdog,
Txd & Rxd
ACGO/SCGO Sw
CGO Sw ATMEGA16 RxD
Microcontroller
ABS On Sw TxD
Reset
Parallel I/O
W_Dog
SCGO SCGO On
SCGO ADC
Driver
10-Bit
Local Power
GIV On
GIV Drv GIV
Supply Monitors
Over_Press
Driver
ISP
Header
SPI Addr
Decoder
Flow
FL DAC CS
DAC
Valve
12-Bit FL DAC LD
Driver
ADC
ADC CS
12-Bit
8-Channel
VREF
Amp/Filter Amp/Filter Amp/Filter Amp/Filter
O2 Sensor
Amp/Filter
Inspiratory Expiratory Manifold
Ventilator Interface Board Transducer Transducer Transducer Transducer
Local Power
+12.5V
Supply
Regulators
RS-422
Transceiver
Watchdog and
Under-Voltage
Monitor
VDD Over-
Voltage Monitor
+12.5V
Over_Press
Comp
Airway_Press
Manifold_Press
Inspiratory_Press
Expiratory_Press
Airway
11 Schematics and Diagrams
11-7