This refers to the number of zones or alarm points covered by the alarm or annunciator. Zones are groups of initiating devices wired on a common circuit. Each wiring circuit is used to relay information to the panel regarding the condition of the initiating devices, which can include smoke, heat, or fire detectors, manual pull stations, or any circuit closure device.
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User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
Other unlisted, specialized, or proprietary visual indication.
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Other unlisted, specialized, or proprietary audio alarm.
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Alarms or systems for burglary / theft can include any combination of 24-hour, perimeter, interior detectors, or notifiers. They are triggered by sound or movement to alert of possible burglary / theft attempts.
Alarms are used for monitoring processes such as heat and temperature, power and power surge, computer systems, gas monitoring, or water level and leak monitoring.
Other unlisted, specialized, or proprietary application.
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Transmitters connect initiating devices or groups of initiating devices. The component transmits signals to the central supervising station, indicating the status of the initiating devices and the initiating device circuits. These may include remote station transmitters or municipal box transmitters.
Digital alarm communicator transmitters (DACT) seize the connected telephone line, dial a preselected number to connect to a digital alarm communicator receiver (DACR), and transmit signals indicating a status change of the initiating device.
Other unlisted, specialized, or proprietary control output.
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The alarm is operated only by manual operation, such as a crank or push-button.
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Manufacturers use many of these terms interchangeably. Keeping this in mind, we have delineated the options as follows to help you locate the ideal item(s) for your needs.
Chassis mount devices can be attached to, or within, the supporting frame of a structure (chassis), exclusive of the body or housing. Some chassis varieties can be mounted within a rack. Rack mount units can be mounted directly into a rack. They come equipped with the necessary rail guides, flanges, or tabs to be mounted in this fashion. The standard 19" rack is typical of this style. DIN rail devices can be mounted on a standard DIN rail.
Handheld or portable devices are designed to be moved freely; they are not meant to be bolted or hardwired in place. This style can include items with wheels, briefcase, laptop style, or handheld products.
The device can be placed into, or through, a depression within an existing panel so that it's face is flush, or nearly flush, with the panel, wall, or ceiling. The method of attachment may include screws, bolts, rails, flanges, etc.
Other unlisted, specialized, or proprietary configuration.
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Explosion-proof devices have totally enclosed housings that are constructed to withstand internal explosion of a specified gas, vapor or dust. Should such an explosion occur, the enclosure would prevent the ignition or explosion of the gas or vapor surrounding the motor enclosure. Underwriter’s Laboratories (UL) governs several explosion-proof ratings.
Intrinsically safe (IS) is an adjective for equipment and wiring that is incapable of releasing sufficient electrical or thermal energy under normal or abnormal conditions to cause ignition of a specific hazardous atmospheric mixture in its most ignited concentration. The IS terminations and wiring may be brought into any hazardous location of any group classification for which it is accepted without requiring explosion proof housing or other means of protection.
Voice evacuation alarms are manual or automatic supervised paging systems used to transmit a voice message (such as information, instruction, direction) on a selective and all-call basis.
The device is designed to function normally in an outdoor environment. It is, to varying degrees, sunlight, water, temperature, frost and ice, etc., resistant.
The alarm, annunciator, provides built-in synchronization of audible signals or strobes. NFPA 72 requires visual appliances to flash in synchronization in rooms or areas where there are two or more visual devices that are not a minimum of 55 feet apart. NFPA 72 requires that fire alarm signals be distinctive in sound from other signals and used for that purpose only. This is known as the three-pulse temporal pattern.
Device contains hardware and software protocols such as Hypertext Transfer Protocol (http) or Web Access Protocol (WAP) for being addressable to, or a node of, the World Wide Web for remote monitoring or communication.
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