Spo2 Printed Circuit Board; Patient Interface; Figure 26: Block Diagram - Nellcor OxiMax NPB-40 Service Manual

Technical Discussion
SpO Printed Circuit Board
2

Patient Interface

78
The NPB-40 consists of two printed circuit boards (PCB), the user interface PCB
and the SpO PCB. The relationship between these two components and their
2
interconnections is shown in the NPB-40 block diagram. See Figure 26.
The SpO PCB provides patient interface and NPB-40 operating power.
2
The patient interface receives signals from the O
signal are converted and supplied to the user interface PCB central processing unit
(CPU). The patient interface receives control signals from the CPU. These control
signals are used to control the light emitting diodes in the O

Figure 26: Block Diagram

XI
M patient sensor. These
AX
M patient sensor.
XI AX