Voice Evacuation

WSA 25 / WSA 50 / WSA 100 Engineering Specifications

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Overview:

The Voice Evacuation System shall be WSA Series WSA 25 / WSA 50 / WSA 100 or approved equal. The voice evacuation system shall provide 25/50/100 watts signal power and 25/50/100 watts voice power, and shall be UL listed as a voice evacuation alarm system.

The voice evacuation system shall be microprocessor based, and shall be listed for use with 12V or 24V fire alarm control panels, be compatible with monitor modules and control modules from analog / addressable systems.

The Control Panel:

The voice evacuation panel shall contain an integral microphone, 25/50/100 Watt audio amplifier, tone generator, digital message repeater, 120 VAC power supply and battery charger.

The panel shall be modular in design, and shall be configured in such a manner that expansion of the audio amplifier can be made without the need to modify or reprogram the existing system. System must be able to accommodate up to ten (10) additional extender audio amplifiers.

The voice evacuation panel shall include integral self-diagnostic routines that shall continually monitor the status of the panel, and shall indicate the type of trouble conditions when they occur in the system. A trouble condition within the voice evacuation panel shall cause a trouble indication to be made at the associated Fire Alarm Control Panel (FACP).

A voice digital message repeater shall be included which shall have the capacity for up to 4 minutes of pre-recorded message.

Message repeats and their timing, amplifier output (25 or 70 V), and AC power fail reporting time period shall be field selectable.

Backup audio amplifiers may be employed to insure survivability of the installed system. A backup amplifier switching module must be provided which will sense any amplifier failure, and will automatically switch the function of that failed amplifier to the standby amplifier.

Signaling Circuits:

The Voice Evacuation System shall provide up to 8 output speaker zones within a standard cabinet. Each speaker circuit shall be supervised for short and open conditions. All speaker circuits shall be able to withstand transient or continuous short-circuit conditions without damage to the amplifier or the system.

Voice Evacuation System Operation:

The Voice Evacuation System shall be triggered through the operation of a Notification Appliance Circuit (NAC) from a Host Fire Alarm Control Panel.

The polarity reversal of the NAC shall cause the immediate broadcast of an ANSI/NFPA temporal whoop tone as the primary alarm signal.

The alarm signal shall be followed by a voice evacuation message that will instruct occupants regarding safe egress from the building. The voice evacuation message shall be broadcast until the FACP is reset, or until emergency personnel interrupt the broadcast with a manual page. After a manual page has been completed, the voice evacuation system shall again broadcast the alarm
signal.

A secondary message shall be provided which can be triggered by the closure of a contact from either the FACP or from a normally open contact.

Secondary messages may be defined specifically for the needs of the project. Up to 64 messages may be selected through contacts, or from a data connection from the FACP. (Optional)

To prevent unauthorized tampering, the voice evacuation system shall cutoff the microphone in the event that the microphone is keyed continuously for 3 minutes or more. Systems that do not have this operation shall not be acceptable for Life Safety Applications.

Each voice evacuation system shall support remote microphone(s), which will be connected to the system through a supervised circuit. Remote microphone(s) may be located up to 5000 feet away from the voice evacuation panel.

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