electric strike info:
Electric strikes are often used for "buzz in" type of systems.
Electric strikes come in many varieties. They can be 12v or 24v or even higher voltage and they may be AC or DC current and some are both.
Strikes come in two configurations, fail safe or fail secure.
A fail safe electric strike needs power to keep it locked.
A fail secure electric strike stays locked even without power.
The most common type is fail secure.
When using a fail secure electric strike even without power it stays locked from the outside. For egress or getting out, a knob or lever on the lock allows for safe exit.
If you must use a fail safe electric strike always install a battery back up.
The "buzzing" sound you may have heard when being buzzed into an office is the sound of AC current going through the electric strike.
If you want this sound as a signal to push on the door when unlocking the strike, then choose an AC electric strike and an AC power source or transformer. If the buzzing sound is not necessary then choose a DC power source or transformer.
The DC strike is almost completely silent when it releases except for the sound of a slight click.
On average a DC electric strike will last longer than an AC electric strike.
If you want to use a DC electric strike or magnetic lock
but still want a signalling sound you will need an electronic buzzer. This buzzer is connected in parallel between the power supply and the electric strike or magnetic lock and makes a buzzing type of sound when the lock releases alerting users that the door may be opened.
Choosing the correct mag lock or electric strike for your installation can be very complicated.
Contact us if you're not sure.
We are happy to help.
Blackhawk Doors knows electric strikes.