Why the magnetic locks adjustable delay, but no effect?

Design of magnetic lock and electromagnet, is using the principle of electric raw magnetic, when an electric current passes through the silicon steel sheet, tightly absorb electromagnetic lock will produce a powerful suction adsorption iron plate to achieve the effect of locking the door when you leave. So why magnetic lock has the delay, but no effect? Q: why the magnetic locks the delay, but no effect? A: magnetic locks 'delay adjustment' begins with after electrify timing, rather than close the door after timing ( Here and have rules don't electricity mortise lock, electric plug lock is close to calculate) 。 Magnetic lock has the delay, but no effect of reason mainly is to share the reason above, everyone's magnetic lock problems need to solve, need magnetic lock friend, you can contact us fuyu hardware.