31
Installation and Operation Manual
Alarms
The MegaPower 48+ system has four categories of alarms:
1.
Patch Panel Alarms
are alarm contacts that are wired directly to the alarms section of a MegaPower 48+ connection
panel. There can be up to 16 patch panel alarm inputs per unit (maximum of 112 alarms with six secondary units).
2.
Serial Alarms
are alarm contacts routed to a RS232 port on the MegaPower 48+ patch panel via an AD2096A Alarm
Interface Unit (AIU). Each connected AD2096A unit can be connected to 48 alarm inputs. A maximum of 512 serial
alarm inputs can be connected.
3.
Dome Alarms
are alarm contacts routed from AD domes to the RS422 or SensorNet connectors on the MegaPower
48+ patch panel. There can be up to four alarm inputs on each connected AD dome (maximum 288 dome cameras).
4.
Video Loss Alarms
are triggered by the loss of the synchronisation signal from any video input connected to the
MegaPower 48+ patch panel. There can be a video loss alarm for every video input, whether it is connected to the
primary matrix or to a secondary unit. This means there is a maximum of 288 video loss alarms.
Programming an Alarm
There are three steps to programming an alarm using
Easy48
:
1. Create an alarm response for the connected alarm contact. This is done using the
Alarm Trigger
screens. When an
alarm contact is triggered, a preset position and auxiliary action on a specific video input can be called, as can a
salvo or pattern. It is also possible to activate on-screen messages, relays on a MegaPower 48+ patch panel and for
the system to send a specified text message to a specified pager.
See pages 33-35 for more details on the
Alarm Trigger
screens.
2. Associate the alarm contact with system monitors. This is done using the
Alarm Associations
screens. When an
alarm contact is triggered, the response that has been created (i.e., video input, salvo, pattern, on-screen message)
will be displayed on all monitors associated with the specific alarm contact.
See pages 36-39 for more details on the
Alarm Associations
screens.
3. Arm system monitors. This is done using the
Monitors
screen. Only armed monitors will display alarm responses,
and the arming method selected determines how alarms will be displayed, queued and cleared.
See page 20 for more details on the
Monitors
screen.
Additional Alarm Programming Notes
Please take note of the following points when carrying out alarm programming:
Auxiliary and Preset Alarm Callups
Multiple alarm contacts can be associated with different auxiliary and/or preset callups for a single camera. If more than
one of these alarm contacts are triggered during an event, the system will activate each preset and/or auxiliary for the
same camera in the order that the alarms are received.
For details about adding auxiliaries and presets to an alarm response, see the
Alarm Trigger
screens on pages 33-35.
Associating Alarms with Salvos
An alarm contact can be set to call a system or link salvo when it is triggered (see pages 33-35). To display these salvos
properly, alarm contacts must be associated with a monitor block containing a sufficient number of monitors for the
cameras defined in the salvos. If there are more salvo cameras than block monitors, the additional cameras will not be
displayed.
It should also be noted that if the first monitor of the block is armed for Manual Clear, the keyboard must call the first
monitor of the block displaying the salvo in order to clear the salvo.
For more details about monitor blocks, see page 21.
Wired Alarm Contact Sets
Consecutively numbered alarm contacts can be group into wired sets. A wired set is a group of alarms such that when
any member of the set is triggered, all members are triggered. Each alarm is then displayed, queued and cleared
according to the arming code of the monitors it is associated with.
If an alarm contact in a wired set is associated with a monitor that has been armed with an Instant or Auto clearance
method, then all members of the wired set will be cleared when the source alarm is cleared. If the monitor has a Manual
clearance method, each alarm in the set must be manually acknowledged, or alternatively one of the Group Acknowledge
link options can be selected to the alarm response so that when a member of the wired set is cleared, all other members
of the wired set are also cleared.
For more details on wired sets and Group Acknowledge link options, see the
Alarm Trigger
screens on pages 33-35.
