Dräger Fabius 4116029 Technical & Service Manual page 61

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Fabius
Function Description
10.5.9 System Temperature Monitoring
The system temperature sensor is located on the MOSFET output module. It is an
NTC (negative temperature coefficient) thermistor. The microcontroller uses the
system temperature sensor to measure the system temperature.
10.5.10 Quadrature Encoder
The quadrature encoder CF32007NT picks up the number of rotations of the motor
and transmits this data to the microcontroller.
10.5.11 Safety Relay
In the event of a malfunction, the microcontroller switches off the safety relay using
the NOT_AUS (emergency off) signal. As a result, the motor, the electronic PEEP
valve, the piston pump, and the fan can no longer be activated.
10.5.12 Fan Control
If the system temperature inside the control box increases (to approx. 60 °C), the
microcontroller activates the fan.
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