X11CB INSTALLATION AND OPERATION
4.
Basic Alarm Sequence letter designations
4.1.
Option number designations
Option numbers can be used with the basic sequence letter designations to define many different
sequence variations. This Standard makes use of the following option numbers to designate
many of the common sequence variations. Other sequence variations are considered to be
special and should be defined by sequence diagrams, sequence tables, or notes.
Option
Number
Key Words
Description
1
Silence Push button
A separate push button is added to allow silencing the alarm
audible device without affecting the visual displays.
2
Silence Interlock
Silence Interlock An interlock is added to require operation of
the silence push button before alarms can be acknowledged.
3
First Out
An interlock is added to require
Reset Interlock operation of the acknowledge push button
before first out alarms can be reset by the first out reset push
button
4
No Lock-In
The lock-in feature is deleted. Momentary alarms return to
the normal sequence state without operation of the
acknowledge push button.
5
No Flashing
The visual display flashing feature is deleted. New alarms
have the same visual display indication as acknowledged
alarms.
6
No Audible
The audible device is deleted.
7
Automatic
A time delay device is added to silence Alarm Silence the
alarm audible device after a set time without affecting the
visual displays.
8
Common Ringback
A common audible device is Audible used to call attention to
both the alarm and ringback sequence states.
9
Automatic
A time delay device is added to silence Ringback Silence the
ringback audible device after a set time without affecting the
visual displays.
10
No Ringback Audible
The ringback audible device is deleted.
11
Common Ringback
A common type of flashing is used to Visual indicate both the
alarm and ringback sequence states.
12
Automatic Momentary
Ringback
Ringback sequence momentary alarms go to the ringback
sequence state without operation of the acknowledge push
button.
13
Dim Lamp Monitor
The visual display indication is dim in the normal sequence
state to reveal lamp failure.
14
Lamp Test
Operation of the test push button tests the visual displays
X11CB-3031-IOM
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