(2) Provide an enclosure with two doors, one behind the other.
Outer door shall consist of a metal-framed sheet of acrylic
plastic not less than 6.35 mm 1/4 inch thick. Inner door shall
serve as the mounting surface for annunciators with silencing
switches mounted outside the two doors. Opening inner door shall
give access to enclosure interior for maintenance. Provide locks
and tamper switches for both doors.
2.4.18.3
Central Alarm Reporting Display Unit
a.
Unit shall perform the following functions through use of integral
processor assemblies and time-division-multiplex digital
(1) Continuously monitor detection subsystem outputs, sensor
zones [and access control subsystem inputs].
(2) Continuously monitor the status of sensor zones [and access
control subsystem elements].
(3) Continuously supervise monitoring system lines including
detection [and access control] subsystem lines connected to alarm
reporting and display subsystem inputs.
(4)
Immediately annunciate IDS status changes.
(5) Permanently print a record, including time, date, and
descriptor, of IDS status changes by zone.
(6)
Provide a capability for operator sensor zone status control.
(7) Provide a capability for user entry of installation-related
sensor zone information.
(8) Provide a capability for monitoring and controlling sensors
requiring a test control input and a capability to monitor an
audio output.
(9) Interface with automatic CCTV video signal switching in
response to a sensor zone alarm, assessment subsystem.
(10) Provide automatic CRT sensor zone alarm display with
user-entered small-area maps and instructions for actions required
of the operator in response to the alarm.
(11) Provide sensor zone status and alarm display on a fixed
format map display with LEDs and audio annunciator.
b.
Central alarm and display unit design requirements:
Design shall
be as follows:
(1) Provide microprocessor-based central alarm reporting and
display unit. Operating programs, firmware, shall be furnished as
an integral part of the processor assembly furnished with each
microprocessor-based component. Within the capability of the unit
as specified herein, the unit operating program shall not require
modification to increase the number of electronic IDS zones after
initial system installation. Manufacturer shall maintain the
capability to update, revise, or otherwise modify firmware as
SECTION 13703N
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