Dräger Medical Babytherm 8004, Technical Documentation Manual

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Babytherm 8004/8010 Function Description
Figure 28 Block diagram of the Main PCB
7.1.1 Voltage selector The voltage selector is used to adapt the scales' mains supply voltage to the
local mains voltage.
7.1.2 Transformer The transformer transforms the mains voltage into a 12 VAC output voltage.
7.1.3 Rectifier The bridge rectifier rectifies the 12 VAC voltage into a 12 VDC voltage.
7.1.4 Voltage regulator Two voltage regulators use the 12 VDC voltage to generate the operating
vo5 Vdd and +5 Vaa.
7.1.5 Microcontroller The microcontroller CS5532 has an internal 24-bit analog/digital converter,
amplifiers and filter modules.
7.1.6 Quartz The quartz clocks the microprocessor with 4.9152 MHz.
7.1.7 Piezo loudspeaker The piezo loudspeaker issues audible signals. The operating voltage is
+5 Vdd.