Dräger Medical Babytherm 8004, Техническая документация инструкция

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Function Description Babytherm 8004/8010
Bridge rectifier
The toroidal-core power transformer supplies the bridge rectifier input with
approx. 9 VAC which are used to generate an unregulated direct voltage
(9 VDC).
Voltage regulator (+5 VD)
A voltage regulator uses the unregulated direct voltage (9 VDC) to generate
the regulated operating voltage (+5 VD).
Voltage regulator (+5 V LED)
A voltage regulator uses the unregulated direct voltage (9 VDC) to generate
the regulated operating voltage (+5 V LED).
GoldCap
In the event of a mains power failure, the GoldCap capacitor supplies the
buzzer and the power failure LED with operating voltage. The GoldCap volt-
age “battery” buffers also the RAM of the microcontroller.
Charging circuit (GoldCap)
The internal operating v5 VD charges the GoldCap by means of a
resistor-diode charging circuit. The charging circuit is switched off at 1-sec-
ond intervals for test purposes.
Mains power failure detection (powerfail)
A monoflop monitors the mains power supply failure.
Buzzer (mains power failure)
A GoldCap capacitor supplies the buzzer with operating voltage in the event
of a mains power failure.
Alarm LED control (mains power failure)
A GoldCap capacitor supplies the alarm LED with operating voltage in the
event of a mains power failure.
Serial data transfer
A driver module amplifies the serial measurement data (skin temperature,
mattress temperature and overtemperature) and the test signals.
Multiplexer
The multiplexer applies the voltages (GCAPVOLT, +5 V LED) to the WT Con-
troller PCB for checking.
Addressing and controlling of actuators and relays
An addressing module, a shift register and an amplifier module control the
actuators and the safety relay fro the radiant warmer.