How's a 2 wire fire alarm system ?

First let's understand the working principle of 2 wire fire alarm system.
2 wire fire alarm systems（also called fire alarm control panel） work by allowing detectors, call points and alarm devices for each zone to be wired on the same set of two-core zone cables back to the fire control panel. This enables it to use a single circuit per zone without the need for a separate sounder circuit zone.

The fire panel （2 wire fire alarm system）can be configured to allow either two-wire or conventional devices to work on a zone. Each zone is individually configurable so a mixture of types can therefore be installed on the same system. This provides you with the flexibility to utilise all the time-saving benefits of a 2 wire fire alarm system with the ability to use a wide range of conventional devices, where required. 

2 wire fire alarm system shares the same straightforward, intuitive interface as the 8 zone conventional fire alarm panel, providing a proven solution for simple programming and maintenance.

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