GE Datex-Ohmeda Aisys Carestation Reference Manual page 459

Electronic
Gas Mixer
Atmel Microcontroller
Sh1 Bal Gas Bal Gas
ADC Ref
Prop Flow
Check
Vlv Sense
Air N2O
Sel Valve Sel Valve
Sh1
Vent
Engine
Connector
Board
ABS
Filter Board
Figure 11-6 • System block diagram (sheet 2 of 3)
M1046983 04/08
Total Total
Total
Flow Flow
p sense
t sense Sense
Bal Gas O2 O2
O2 Prop
Temp Flow Temp
Vlv
Sense Sense Sense
O2 O2 Byp
Sel Valve Sel Valve
+12.5V Accessory Power
+12.5V Valve Power
Exp Data
I 2 C MUX +12.5V
Insp Data
to Flow Sensors
2
E Clk
+5.0VA
Filter
E 2 +5.0V
+5.0VDD
+5V
E GND
2
Reg.
+6.0VA
Bag/Vent Sw -6.0VA
O2 Flush Sw
Emulator
Header
O2 Disconnect
Reset, Watchdog,
ACGO/SCGO Sw
CGO Sw RxD
ATMEGA16
Microcontroller
ABS On Sw TxD
Canister Release Sw Reset
Parallel I/O
W_Dog
SCGO SCGO SCGO On 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 Airway
Ventilator Interface Board
Transducer Transducer Transducer Transducer
Local Power
+12.5V
Supply
Regulators
Activity Indicators
Txd & Rxd
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
11 Schematics and Diagrams
11-7