7100 Anesthesia Ventilator
2-14
02/03 1006-0836-000
2.4.5.2 Control Board
Analog Circuits
The analog section of the controller board processes inputs from the
Monitoring Interface Board and the Pneumatic Engine Board. It multiplexes
the inputs for display by the digital section.
•
Inspiratory flow
•
Expiratory flow
•
Airway O
2
•
Airway pressure
Under the control of the digital section, the analog section includes drivers for
the pneumatic engine components:
•
flow valve (inspiratory valve)
•
PEEP valve
•
PEEP safety valve
The switch signals from the Monitoring Interface Board and the supply
pressure signal from the Pneumatic Engine Board are passed on as inputs to
the digital section.
Figure 2-10 • Control board block diagram - Analog circuits
Monitoring Board Connector
ACGO
E2_PWR_ON
SCLK+
SCLK-
INSP_DATA
EXP_DATA
INSP
EXP
O2
O2_DISCONNECT
+12V_10VA
BAG / VENT
SW1
SW2
SW3
INSP_RET
EXP_RET
O2_RET
O2 IA
Insp IA
Exp IA
Noise
Filter
AGND
DGND
30 Hz
3-Pole
Filter
Pneumatic Engine
Board Connector
8-Ch
MUX
4.096 Volt
Reference
Airway IA
Noise
Filter
Dual 12-Bit
Serial DAC
Flow
Valve
Driver
PEEP
Valve
Driver
Safety
Valve
Driver
Voltage
Monitor
VDD
VDD2
VBUS
VDD_FAIL
VDD2_FAIL
VBUS_FAIL
SAFETY_VLV_ON
P_PAT
P_PAT_RET
FLOW_DR
PEEP_DR
SAFETY_VLV_DR
SUPPLY PRESSURE LOW
3
FLOW_VLV_V
PEEP_VLV_V
ADC_TEST_REF
AGND_REF
PEEP_DAC
FLOW_DAC
12V_10VA_TEST
P12V_TEST
N12V_TEST
IBATT
VBATT
MUX_A0
MUX_A1
MUX_A2
Comparator
REF
HI_PRESS
Buffer
Conditioning
Circuits
12V_10VA
P12V
N12V
12V_10VA_TEST
P12V_TEST
N12V_TEST
INSP_FLOW
EXP_FLOW
AIRWAY_PRESS
O2_SENSOR
8-Ch
12-Bit
Serial
ADC
1
2
3
4
5
6
7
8
0
1
2
3
4
5
6
7
SAFETY_VLV_FAULT
Divider/
Buffer
FLOW_VLV_V
PEEP_VLV_V
DAC A
DAC B
FLOW_DAC
PEEP_DAC
SD_CLK
SD_IN
SD_OUT
CPCVR_OPEN
CANI_REL
BYPASS
Noise
Filter
Noise
Filter
30 Hz
3-Pole
Filter
30 Hz
3-Pole
Filter
30 Hz
3-Pole
Filter
Divider/
Buffer
AB.43.093
Summary of Contents for 7100
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Page 102: ...Notes 5 22 02 03 1006 0836 000 ...
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