Technical Description A-Elec; General Description - Datex-Ohmeda Anesthesia Delivery Unit S/5 Technical Reference Manual

TECHNICAL DESCRIPTION A-ELEC

General description

This section describes the Central Electronics (A-ELEC) of the ADU. The electronics of the Fresh Gas
Control Unit (A-FGC1) and the Electronic Ventilator (A-EV1) are described separately.
The Central Electronics of the ADU consists of:
•
Power supply
The power supply transforms and rectifies mains AC voltage into lower DC voltage. The DC
voltage is distributed to the consuming units via a power bus (VBUS). The VBUS has a battery
backup for mains power loss. The A-FGC1 and the A-EV1 have their own DC/DC converters for
generating proper voltages from the VBUS to the analogue or digital circuits.
•
Digital section for data processing
The digital section consists of:
•
•
•
Flat display with keyboard
The flat display consists of a power supply and an 8-color LCD display with backlight. The
keypad, with its own CPU board, is also located in the display unit.
•
Audio amplifier board
The audio amplifier board is located on the mother board. Its function is to amplify alarm
signals to the loudspeaker from the CPU board.
•
Auxiliary power outlets A-EO
The auxiliary power outlets are equipped with fuses for each outlet.
CAUTION The auxiliary power outlets are only energized when the power cord of the ADU is
connected, not when running on batteries.
Document No. 8502856
CPU board
The CPU board processes the information from the A-FGC1, A-EV1, keyboard and the
Anesthesia Monitor (AM) or Capnomac Ultima (when connected).
VGA display controller board
The board feeds the information from the CPU board to the flat display.
Technical description A-ELEC
D-1