LS10144-001SK-E
System Operation
10-18
will activate and the “Pre-Alarm” output will deactivate. (Also refer to Table 10-4.)
10.7.2
Double Interlock Zone Releasing
A Double Interlock Zone uses a minimum of two addressable detectors, a designated manual release switch, and
an interlock switch input. An interlock switch is typically a dry-contact pressure switch and will be referred to as
an interlock/pressure switch in this document.
Conditions Required for a Pre-Alarm Output Activation
If any single addressable detector is activated, the “Pre-Alarm” output will activate. This alerts the user that the
initial stages required for a release condition are present. (Also refer to Table 10-4.)
Conditions Required for a General Alarm Output Activation
If two addressable detectors, a manual release switch is activated, or an interlock switch is active, the “Pre-
Alarm”, and “General Alarm” outputs will activate.
Conditions Required for a Release Output Activation
Any release requires the activation of an interlock switch, and either a manual release switch or 2 activated
addressable detectors. When these conditions are met, the “Release” and “General Alarm” outputs will activate,
Table 10-4: Single Interlock Zone Operation
Inputs
Output Results
1st Addressable Detector
x
x
x
x
2nd Addressable Detector
x
x
x
x
Manual Release Station
x
x
x
x
Nor
m
al
Pre-Alar
m
Pre-Alar
m
Re
le
as
e a
n
d
Ge
ne
ra
l A
lar
m
Re
le
as
e a
n
d
Ge
ne
ra
l A
lar
m
Re
le
as
e a
n
d
Ge
ne
ra
l A
lar
m
Re
le
as
e a
n
d
Ge
ne
ra
l A
lar
m
Re
le
as
e a
n
d
Ge
ne
ra
l A
lar
m
Important!
Only addressable detectors can be used. No conventional detectors can be used.
Each Double Interlock Zone input requires at least one Interlock/pressure switch and at least one manual release switch.
