GE Datex-Ohmeda Aisys Carestation Reference Manual page 51

Power and
Communication to
other Subsystems
Gas Pressure
Transducers:
Alt O Switch
2
Display Unit
M1046983 04/08
The Anesthesia Controller Board provides power and communication to:
Ventilator Interface Board (VIB):
• Power = 12.5VDC
• Communication = RS422
Gas Mixer:
• Power = 12.5VDC
• Communication = RS422
Agent Delivery Board (ADB):
• Power = 12.5VDC
• Communication = RS422
M-Gas Power Board:
• Power = 12.5VDC
• Note: Communication to and from the M-Gas is via the Display Unit
Gas Pressure Transducers monitor the Pipeline pressures of all gases connected to the
system. Gasses measured can include O
form 0 to 697 kPa (101 psi). Though these transducers are located near the machine
pipeline connection points, they are maintained and monitored by the Anesthesia
Controller Board.
Pressure transducers also monitor all cylinder pressures. Gasses measured can
include O , second O , Air, and N
2 2
• from 0 to 27580 kPA (4000 psi) for O
• from 0 to 9805 kPa (1422 psi) for N2O
The transducers are located on each cylinder yoke; they are maintained and monitored
by the Anesthesia Controller Board.
The Anesthesia Controller Board monitors the position of the Alt O2 Switch.
The Display Unit receives power from and has limited communication with the PCB. This
limited communication allows for data like power supply status and voltage readings to
be displayed in service mode.
The MAJOR communication responsible for getting clinical settings to the system and
the ability to display parameters occurs between the Anesthesia Controller Board and
Display Unit. The Anesthesia Controller Board and Display Unit communicate via
RS422.
, Air, and N O. Their measurement range is
2 2
O. Their range is:
2
and Air
2
2 Theory of Operation
2-19