Security monitoring The company explains how the security monitoring access control system is linked with the fire control
With the development of technology, the always independent fire alarm system is more and more integrated with the building automation system, especially associated with the security monitoring access control system.
Fire and security monitoring All access control systems can be integrated together to quickly collect evidence, quickly evacuate people, and coordinate all security monitoring access control systems in places with dense traffic in the event of fire, terrorist attacks and other emergencies.
Previously, due to security monitoring The access control system, fire control system and other systems are isolated. When an emergency is found, a series of problems, such as personnel escape and rapid evacuation, can not be uniformly dispatched. The "door god" access control system, which usually ensures safety, will become a major obstacle for people to escape at this time. At the same time, the on-site situation has become chaotic, which makes it difficult to obtain evidence.
because Here, security monitoring access control system It must have fire fighting and fire linkage function.
How can we realize the linkage between security monitoring access control and fire control system? Here are two common methods:
The first is the direct power-off mode of electric lock for security monitoring access control.
The fire protection system can directly connect external relays (it should be pointed out that when there is no fire alarm signal, the coil should be in the power off state, so as to extend the life of the relay) to control the power supply of the electronic lock of the access control system, that is, the normally open contact of the relay controls the connection and disconnection of the 220V power supply, and the relay will act in time when a fire alarm occurs, Power off control (mains and backup power supply) is forced on the electric lock power supply of the access control system, so that the designated door can automatically open when the system is powered off. The advantage of this method is simple to use, but controller No alarm signal is connected and no corresponding record is saved.
The second type of access control system logic judgment linkage (indirect linkage).
The alarm signal of the fire alarm system is directly communicated with the linkage expansion port of the access controller. This mode can realize the input functions including the fire alarm signal input, the glass breaker alarm signal input, as well as the audible and visual alarm signal output, forced electric lock action output and other functions. In case of fire, the access controller will receive the fire alarm signal transmitted by the fire alarm system in the form of relay dry contact (the fire alarm system sends the signal actively, and the access control system receives and executes the control passively), so as to control the automatic opening or closing of the designated electric lock according to the prefabricated linkage command, so as to facilitate the normal evacuation of personnel and achieve the purpose of escape, At the same time, some doors are closed to prevent the spread of fireworks.
In order to further emphasize the safety of the channel and prevent people from deliberately creating false fire signals so that the electric lock can automatically open and cause the escape accident, the access control system can be set to the multi-channel fire alarm signal input authentication mode, that is, it can be set to open a designated door (such as the fire access door on each floor) when receiving the multi-channel fire alarm signal, If only a single alarm signal input is detected, no action command will be sent to the electric lock, but the electric lock can still be opened through the normal legal exit process.
