Page 14 (Model J)
2. Principles of Operation
The SLE5000 infant ventilator consists of an electronic system in the upper section of the
ventilator and a pneumatic system in the lower.
2.1 Electronic System
The electronic system comprises three autonomous subsystems, one responsible for
monitoring the patient, one responsible for controlling the valves of the pneumatic system
and one for the user interface (touchscreen and displayed data). They are connected
together by three serial communication links in a delta configuration.
The ventilator has an internal battery that can power the ventilator in the event of a mains
power fail. If the mains power fails with the battery fully charged, then operation will continue
for 30 to 60 minutes depending on ventilation mode.
See “Electrical Block Diagram” on page 220.
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