What is the key to the door opening of the access control system? effect? Is it an emergency access to all access control?
Access control system to open the door with a key, password, credit card 3.
Open key valve, generally refers to a key with a switch type products. The role of 1, can be independent with the electric lock system; 2, combined with the access control system can do access control incident and linkage all access door; 3, you can also need some temporary temporary open the door to the door with the access control.
Multi-contact output, can be linked to multiple access control, and sometimes can be connected to electromagnetic locks, electric locks, the use of switch control, in an emergency with the key to open all the doors. Emergency cases: 1, the fire, access control and fire linkage failure, access control more, you can directly use the key to open all doors to escape; 2, access control system conditions, under normal circumstances the power will open the door, but for safety , You can use the key to open the door and then close the door; 3, some access control with open door after the automatic shutdown function, but the door needs a temporary long open, available open key valve.
