Analogue addressable fire alarm systems are essential for the protection of life and property. They are a legal requirement under the Regulatory Reform (Fire Safety) Order 2005 for most non-domestic premises where people work, or visit. That includes offices, shops, hotels, public venues, and almost all new buildings under the 2010 Building Regulations.
A guide to fire alarm system types
Welcome to the second part of our fire alarm system guide, in which we cover 2-wire fire alarm systems and analogue addressable alarms.
Two wire fire alarm systems
Designed for smaller operations, two-wire fire alarm systems are based on conventional system technology. In two-wire systems, however, the detectors, call points and alarms for each zone are wired with the same set of cables to the control panel. This setup enables it to use a single circuit per zone, which covers both detection and power for the sirens.
Although two-wire systems cost more than four-wire systems, they are faster, more flexible and not as expensive to install. Two-wire systems have additional functionality, for example, fault conditions, detector recognition and isolation.
Analogue addressable fire alarm systems
Conventional systems will only give information relating to a specific circuit or zone. If you need more information, then analogue-addressable fire alarm systems will give you details on individual detectors.
Addressable (or “intelligent”) fire alarm systems are specifically designed for larger commercial premises and complex networked systems. They are more expensive and complicated than conventional 2 or 4 wire systems, with increased flexibility, intelligence, identification speed, and a greater scope of control.
In analogue addressable systems, the different types of initiating devices will be wired into one or more loops around the premises. This means they require less cabling than conventional systems, where each detector or call point has a unique address.
The fire control panel constantly receives information and status reports from each individual device and can indicate the exact location of a fire, a fault, smoke, heat, or any contamination.
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