Bosch LTC 8500 Instruction Manual download pdf (Page 50)

EN | 40 Bosch Security Systems | December 13, 2005

15 Alarm Information

15.1 General

The ability to automatically switch video in response to an external signal (usually a

contact closure) is a necessary feature in any video switching system. The Allegiant

system permits users with Priority Level 1 to select any 1 of 3 predefined alarm

response modes (via keyboard User Function 19). A description of these three (3)

modes appears below. Pictorial examples of the three (3) alarm responses are also

shown on the following pages.

The system can also be programmed with a wide variety of alarm response charac-

teristics using the optional LTC 8059/00 MCS package or the optional

LTC 8850/00 GUI Software package.

15.2 Basic Alarm Response Mode

In the Basic alarm response mode, any or all of the monitors can be selected as

alarm display monitors. Each alarm can then be armed to display its camera(s) on

any set of armed monitors. Multiple alarms, on the same monitor, will sequence at a

2 second rate. Note that monitors and alarms can be armed and disarmed individu-

ally as required. Alarmed video automatically clears when the alarm input signal is

reset.

15.3 Auto Build Alarm Response Mode

This mode uses a set of monitors as alarm display monitors. All system monitors

may be armed if desired. Each triggered alarm will display its alarm video on a dif-

ferent monitor, starting with the lowest numbered armed monitor. If all the armed

monitors are already displaying alarm video, subsequent alarms will build on the

existing alarmed monitors; and each monitor will sequence through its alarm videos

at a 2 second rate. Note that monitors and alarms can be armed and disarmed indi-

vidually as required. Alarmed video will automatically clear when the alarm input

signal is reset.

15.4 Sequence and Display Alarm Response Mode

This mode designates two monitors as alarm response monitors. Monitor #1 is the

DISPLAY monitor (also called a REVIEW monitor) and monitor #2 is the

SEQUENCE (or STEP) monitor. The first alarm appears on both monitors and

additional alarms begin to sequence at a 2 second rate on the SEQUENCE monitor.

The DISPLAY monitor holds the first alarmed camera video until manually

acknowledged through the keyboard. When the first video is cleared from the DIS-

PLAY monitor, the next alarmed video (“next” meaning the camera that enters an

alarmed state second) is displayed until cleared; operation continues in this manner.

Note that alarms can be armed and disarmed individually as required. Note also that

all alarms must be manually cleared; the presence of alarm video is not dependent

upon the duration of the alarm input signal to the system.

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Bosch LTC 8500 Instruction Manual Page 50