(3) Respond immediately to alarm reporting and display unit
interrogation.
(4) Generate immediately up to two control output signals when
commanded by the alarm reporting and display unit.
(5)
Report sensor zone status to the local annunciator unit.
b.
Provide [microprocessor based] control units of modular assembly
to facilitate expansion to maximum sensor zone monitoring and
control capability, as well as maintenance. Control units shall
have electronic diagnostic aids to facilitate troubleshooting and
maintenance. Control units shall be capable of interfacing with
other control units to modularly increase the number of sensor
zones controlled from a single point. Provide control units [in
locked NEMA ICS 6, Type 4 enclosures for outdoor applications and]
in locked metal enclosures to provide protection for the
environment in which installed. [Control unit shall be capable of
functioning independently of the central alarm reporting and
display unit.] [Provide a separate power supply for each control
unit.]
2.4.18.2
Local Annunciator Unit
Unit shall operate as a slave unit of one or more control units. Unit
shall be designed to display visually and audibly for each sensor zone all
conditions displayed and signals annunciated for the facility location.
Provide space for additional visual and audio annunciators in the local
annunciator to accommodate expansion. Clearly label visual displays to
identify the pertinent circuit or zone. Unit shall be the closed front
type. [Local annunciator unit shall not contain controls except a switch
for its own power.] Local annunciator unit shall be powered from [the
alarm reporting and display unit power supply] [control unit power supply]
[an independent power supply].
a.
Modular construction
(1) Each sensor zone circuit at the local annunciator unit shall
be accompanied by an individual annunciator module to be mounted
in the unit.
(2) Modules shall be plug-in modular units built from solid-state
components.
(3) Each module shall provide three distinct and independent
visual signals in duplicate: SECURE, ACCESS, and ALARM.
(4) Modules that use light-emitting diodes (LEDs) shall be
required to duplicate only the ALARM signal.
(5) Module shall also provide an audible alarm with silencing
switch [, an ACCESS-SECURE toggle switch,] [and TEST] and RESET
[pushbutton] switches.
(6) Modules monitoring zones which do not permit authorized entry
shall not be equipped with an ACCESS-SECURE switch or an ACCESS
visual signal. Plugs may be inserted in lieu of switches or
signals.
SECTION 13703N
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