Nellcor OxiMax N 5500 Service Manual page 92

l NIBP unit : measures non-invasive blood pressure data.
Asyncronous Serial Communication with Communication UNIT
Figure 19. NIBP Unit Block Diagram
l ECG unit : measures electrocardiographic waveform data.
Patient Cable
Input
Protection
Buffer &
Circuit
Filter
Figure 20. ECG Unit Block Diagram
l Respiration unit : measures respiration rate data.
Constant
Current
Source
Patient Cable
Protection
Circuit High Pass
& Filter
Trans
Figure 21. Respiration Unit Block Diagram
l SpO
unit : measures oxygen saturation data.
2
Patient Isolation
DC +5V
S3C44B0X
Figure 22. SpO2 Unit Block Diagram
N5500 Service Manual
System Processing Description
Isolation DC +/-5V
Lead off detector ,
Instrument AMP,
RL Driver,
Gain AMP, Filter
Signal Sat Detector
Lead off detector ,
Instrument AMP,
RL Driver,
Gain AMP, Filter
Signal Sat Detector
Lead off detector ,
Instrument AMP,
RL Driver,
Gain AMP, Filter
Signal Sat Detector
Lead off detector ,
Instrument AMP,
RL Driver,
Gain AMP, Filter
Signal Sat Detector
Isolation DC +/-5V, +/-12V
Band Pass Band Pass
Rectifier
Filter
Gain Control
from PIC16C65B_P
Isolation DC +/-5V, +/-12V
Isolation DC/DC
Isolation AMP
NIBP
Module
Patient Isolation
DC +5V
Isolation DC/DC
Level
Isolation AMP
MUX
Conversion
Lead Selection
Photocoupler
Patient Isolation
DC +5V
Isolation DC/DC
Level
Isolation AMP
Filter
Conversion
MP506
C-LOCK
SpO2
Module
S3C44B0X
S3C44B0X
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