Operating instructions

ALARMS - PROGRAMMING OVERVIEW
An ALARM is a signal generated by an external device that is
connected to an AD Matrix Switching System, either directly
or through an Alarm Interface Unit. External alarm signals can
be generated in different manners, such as opening a locked
door or window, or detecting a moving object. All types of
alarm signals are referred to as alarm contacts by the AD2150.
Each external alarm contact is assigned an alarm contact
number (ACN) at the source. A maximum of 128 alarm
contacts can be programmed for response by the AD2150.
Alarm Receipt
External alarm signals are received by the AD2150 RS-232
ports from an Alarm Interface Unit or an external computer
emulating the alarm codes. To process the inputs as alarms,
the port must be set for ALARM use via the PORTS menu,
page 4-15. Eight alarm contact inputs are also provided by the
rear panel ALARMS connector, page 1-3. When these are
used for alarm contacts, the RS-232 alarm inputs provide an
additional 120 alarm contacts, for a total of 128 alarm contacts.
Alarm Arming and Response
All alarm response actions operate by associating (arming)
cameras and monitors with alarm contacts. When a monitor is
armed for an alarm contact, the camera video associated with
that alarm contact is displayed when the alarm is received.
Individual camera inputs or camera salvos, each with preset
scene and auxiliary action, may be automatically called to
monitors or monitor blocks in response to alarm receipt.
In order to provide automatic video callup to monitors, the
cameras and monitors must be armed for alarm response. This
includes associating alarm contacts to both cameras and
monitors, and specifying an Arming Code for each monitor.
Three steps are required to arm the system for alarm response
(these steps may be performed on any order).
1. Associate Alarm Contacts with Cameras, using the SET
ALARM CONTACTS menu.
Each alarm contact (ACN) must be associated with a
camera or a camera salvo for automatic callup when that
alarm is received. Refer to the Set Alarm Contacts menu,
page 4-10, to associate cameras to each ACN. Each camera
or camera salvo can be associated with more than one ACN
by this menu, allowing multiple views of a scene to be
called up on receipt of an alarm.
2. Associate Alarm Contacts with Monitors, using the ARM
CONTACTS menu.
Each alarm contact (ACN) must be associated with a
monitor for callup when that alarm is received. Refer to the
Arm Contacts menu, page 4-21, for arming each ACN to
monitors. Each monitor can be associated with more than
one ACN by this menu, allowing multiple alarms to be
queued and sequenced on a single monitor.
3. Arm Monitors, using keyboard commands.
Monitors are armed using a Monitor Arming Code which
identifies the alarm display method and the alarm removal
method for that monitor. Refer to Arming the Monitor,
page 3-6, for the commands to arm a monitor.
Alarm Display Indicators
During the period that an alarm is active and being displayed
on an armed monitor, the monitor Status Line in the on-screen
display, shows the uppercase word “ALARM”.
Alarm Audio Indicators
The AD1678CM and AD2078A keyboards can be
programmed to provide an audio tone when an alarm is
received. When the audio tone is enabled at a keyboard and a
armed monitor is called to that keyboard, the audio tone is
sounded when the associated alarm is first received. Refer to
Audio Alarm Programming, page 3-5, to enable or disable the
audio tone.
Alarm Print Messages
When an AD2150 RS-232 port is set for PRINTER Port Use, a
print format message is generated via this port for all alarm
events, including the receipt of the alarm contact and the
clearance of the alarm. The alarm message formats are shown
on page 4-16. Refer to the Ports menu, page 4-15, to set Port
Use.
APPENDIX
A-2