S/5 Airway modules
Document No. 800 1005-1
25
Valves, pump and infrared lamps control
Valves are controlled by ACX Measuring board from which the control signals are ran through buffer
IC to the valve connector. OCCLUS signal controls the pressure (occlusion) valve and ZERO signal
controls the zero valve.
Control signal for the pump comes from the module processor. The signal is 50 Hz pulse-width
modulated square wave. Control command is received from ACX Measuring board in serial
communication.
Control command (LAMP) of the infrared lamps of the chambers comes from the module
processor.
Key push reading
CPU reads the front panel key pushes.
Reset
Voltage supervising circuit performs power-on reset. Reset from the module bus is connected via
RS-485 buffer.
NRESET
X4: OM
SENSOR
X2: ACX
UNIT
X5: ASX
SENSOR
X1:
AUX I/O
X3: PVX
SENSOR
ANALOG: VOL.
AWFLOW, AWPRE
SERIAL COMM. CHIP
EPROM
RAM
CPU
PUMPDRV
MODULE BUS
SERIAL COMM.
PUMP DRIVER
LAMP DRIVER
VALVE DRIVERS
X11: MODULE
KEYBOARD
X7: PUMP
X9: ACX. X8: ASX
LAMPS
X12: VALVES
NRESET
ZERO OCCLUS
LAMPDRV
RS-485 buffer
Vo
lt
a
g
e
su
p
e
rv
iso
r
RS-485 buffer
POWER RESET
MODULE BUS
RESET
CPURESN
buffer
buffer
Figure 15
Gas mother board block diagram
Summary of Contents for S/5 G-AO
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