EST3 Series fire alarm control (linkage type) is the Edwards company, the large and very large construction project development, 
 Is by far the most advanced and flexible integrated security system. 
 System capacity 
 1) The distribution of each circuit has a smart feature detectors 125 and 125 address of intelligent features of the distribution module address. Among them, 125 
 If a distributed configuration smart feature detector relay base, but also increase the output point 125. 
 2) 1 standard EST3 fire alarm controller (configuration a central processing unit CPU) with 1 to 10 loop, a total of 1,250 
 Characteristics of a distributed intelligent detector address and 1,250 distributed intelligence features module address. 
 3) EST3 fire alarm control system capacity can scale integrated projects, different factors such as the construction period, according to the actual needs 
 Flexible configuration. 1 EST3 fire alarm control units can be configured either a central processing unit (CPU), also can be configured 
 Into by a number of central processing unit (CPU) a network of fire alarm controller. 
 4) For large construction projects, can be composed of 64 fire alarm control Peer-to-Peer network of multiple priority token ownerless, 
 System can have 160,000 addresses. The distribution of 80,000 and 80,000 intelligence features of the detector modules distributed intelligence features. 
 Wiring 
 Circuit without using twisted pair signal lines and special shielded cable, common BV line (fire retardant comply with fire requirements) can be. Back to the line of transmission distance up to 3028 meters, circuit wiring can be selected according to the actual project needs the ring (CLASS A) or branch-shaped (CLASS B). 
 1) ring (CLASS A) 
 Signal line leads from the loop controller, intelligent features in a circular series of connected peripheral device, the signal from the end of the line equipment and then return loop control card. 
 2) branch-shaped (CLASS B) 
 Signal line leads from the loop controller to star connected series of intelligent features of peripheral devices, the signal line connecting the branch circuit characteristic series of intelligent peripheral equipment, not to return loop control card. 
 * Number of branches of each loop can not exceed 124. 
 3) Mixed type (CLASS A + CLASS B) 
 In a circular route can be arranged at the same time a number of branch-shaped lines. 
 * Each loop can only use one ring; 
 * Number of branches of each loop can not exceed 124.