The following three common ways to unlock the access control electric lock

Power on to unlock: for example, electric lock, when there is no power supply, the lock core is inserted in the door bolt, so if there is power failure, the lock cannot be opened; The unlocking signal of the host computer is sent to the electric control lock, and the magnetic core inside the electric control lock is pulled out of the lock core, and the lock is opened.

Power off and unlock: for example, an electromagnetic lock, when powered on, the disk of the electromagnetic lock attracts the door (i.e. locks), and the unlocking signal of the host computer is sent to the electromagnetic lock to control the electromagnetic lock to power off and then unlock.

Multi-channel card reader: The common data communication modes of card readers are 485 and 232. These signals can be combined to approach the controller, but each chuck may have corresponding settings.