ZOLL M Series Defibrillator Rev R - Manual (Page 136)

M Series Service Manual
126
FET_MON Analog voltage monitors the
condition of the discharge
transistors.
Provides a signature
voltage in case of a fault.
PAT_CUR Bound on the range of 0 - 2.5
V and accommodates defib
currents of -50 to +100 A
Analog signal representing
the patient current during a
defib discharge.
L OGIC C ONTROL
S IGNAL
O PERATION
XPWR_ENABLE: This logic signal from the gate array enables the charging circuit
when true, and inhibits the charging circuit when false.
SAFE: This logic control signal is generated by the Main System Board
to halt the pace/defib function in the event of a detected fault.
SHUTDOWN: This logic signal is true during reset and fault conditions. (VCC
error, watchdog error, etc.) and halts operation of the PD
generator.
XPACE_ON: This logic signal is generated by an optocoupler, and indicates
that the pace output circuit is active. It is '0' true when pace
current is flowing.
XSAFREL: Logic signal from the GA that operates the safety relay when '0'
true.
XPACEREL: Logic signal from the GA that operates the pace relay when '0'
true. XPATREL: Logic signal from the GA that operates the solid
state patient relay when '0' true.
XPAT_ENABLE: Logic signal from the processor controlled by the monitor that
grants operation of the solid state patient relay. It is false during
pacing.
A NALOG V OLTAGE O PERATION C OMMENT