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It is commonly referred to as "dual door interlock" or "AB door", that is, when the first door is opened in the two doors being controlled, the second door will be in the state of being forced to lock (even if it is legal at this time). Identity cannot be opened. Only when the first door is closed, the second door can be opened.
The interlocking of the door points in the controller is based on the state of the door being opened or closed as the judgment basis of the interlock, and the opening or closing signal of the door is taken from the door magnetic switch installed on the door frame (some of the door magnetic switches are electric locks. Bands, some of which need to be installed externally, according to the state of the door by the controller to determine the legitimacy of its logic, which gives instructions to control the opening or closing of the electric lock.
The main applications of this "two-door interlock" function are banks, prisons, detention centers, and other places where access control is relatively strict. Currently, access controllers in China basically have this function.
Controller and controller control
When a controller in the system detects a door or personnel pass or other abnormal conditions, it will require control of the output port by other controllers in the linkage system. For example, when one of the controllers in the system detects a fire alarm signal/anti-theft alarm signal, other controllers can be forced to open or close certain doors or all doors to enable normal evacuation of personnel or prohibiting access of personnel.
The mutual control between the controller and the controller is, in principle, achieved through the management software of the upper computer. The linkage function within the access control system can be realized by most of the access control systems of the software management platform.
Access control system alarm function
The access control system alarm function refers to the alarm function of the controlled area associated with the access control channel regulation. The access control function is an effective personnel access management for the channel, and its emphasis is on “channel management and controlâ€. The alarm function of the access control system is to alarm the abnormally-entered controlled area. Its emphasis is on the “zones†in the controlled area. The coordination of the access control and the control of the inner zone in the passage can provide the greatest degree of security for the property and personnel in the controlled place.
1, arming and disarming
Arming means that the access control system uses its associated sub-devices (card readers, buttons, etc.) to arm the alarm-related or all zones, and disarming refers to disarming some or all of the alarm zones. After the arming, if any person appears in the monitoring area, it will call the police. After disarming the guard, the controller will not perform alarm processing.
The access control system can implement various ways of arming and disarming: button arming, card arming, password arming, scheduled time arming (automatic arming), remote arming, etc.; button disarming, ordinary user access card disarming, “disarming†card disarming, “ Password "disarm", scheduled time group disarm, remote disarm and so on.
The working principle of interlocking arming and disarming of the access control system is to collect the status of the door through the auxiliary input points on the access controller and alarm signals such as infrared detectors and glass detectors in the defense zone, and upload them to the access controller in real time. The “Real-time monitoring†interface of the access control system management software will flash information such as the alarm point address, live status, etc., and can display the status of the defense zone in both electronic map and form.
The guarding and disarming linkage of the access control system is aimed at alarming and controlling the area when no one is in the restricted area. The scope of application can cover all the control places of the access control system.
2, the door forced action
Gate forced action means that in the armed state, when the alarm input module of the access controller detects an abnormal condition and sends a signal to the system, the controller judges whether the input state is "legal", if it is judged to be illegal, it is related to The electric locks of the regional electronic control doors are forced to close the control, that is, the relevant area electric control doors are linked at the same time as the alarm, and the illegally entered personnel are controlled within the restricted area, which provides the necessary time guarantee for the security personnel to handle the piracy.
Of course, the linkage alarm function of the access control system also has its drawbacks, such as the temporary access of employees in the state of nightly deployment, which makes the system's "flexibility" and "security" conflict. In the “arming disarming†and “door forced action†situations, there may be times when legitimate personnel authorized by the access control system need to enter or exit the restricted area due to special circumstances. At this time, they must go to the control center to perform “manual disarming†or have more High-privileged administrators went to the scene to perform “swipe card disarming†or “disarming passwords.†Although this process can be cumbersome, it is the only solution to achieve system security.
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Access Control System Knowledge Introduction!
Controller door interlocking