Dräger Medical Babytherm 8004, Техническая документация инструкция

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Function Description Babytherm 8004/8010
Soundchip with volume setting
The microcontroller connects the output signal of the soundchip to the output
signal of the volume control. The connected output signal is amplified and
transmitted to the loudspeaker.
The microcontroller can control the volume of the volume control via the soft-
ware.
Text display contrast setting
An amplifier module is used to set the contrast of the test display.
Text display latch control
Latch modules provide digital control of the text display.
Voltage supply to text display backlight foil
A switch-mode regulator supplies the text display backlight foil with a voltage
of about 1 to 5 V.
Nurse call
A relay is activated in the event of an alarm. The relay functions as a switch.
An external alarm device (e.g. nurse call) can be connected to the switch.
An alarm delay prevents the nurse call from being activated immediately after
pressing the check key.
Interface modules
The interface modules connect the data bus to the peripheral equipment
(Medibus, modem, scales).
Level converter
The level converters adapt the interface of the WT Front PCB to the inter-
faces of the peripheral equipment.
Optocoupler
Optocouplers electrically isolate the modem, the Medibus and the central
alarm from the WT Front PCB.
Display module
The display module supplies the 7-segment display with operating voltage
and selects the individual key. The display module stores a key operation in
the internal memory area and puts this information on the data bus.
LED matrix control
A shift register and a selection logics control the LED matrix.