Choosing the “right” door hardware for a specific application really begins with the customer. Examining the existing lock hardware to determine what can be properly used for the proposed application is the second step. First, it is most important to find out how the customer wants the door to...
To access the remainder of this piece of premium content, you must be registered with Locksmith Ledger. Already have an account? Login
Register in seconds by connecting with your preferred Social Network.
Complete the registration form.
The wireless alternative for this scenario is a single relay controller and wireless transmitter. Relays are used to control a circuit by a low-power transmitter signal. The important considerations of wireless operation are the range, time delay, voltage and amperage of the NO/NC contacts, power consumption and the size of the controller. A single relay controller can be installed above the drop ceiling or even within the wall cavity if there is sufficient room behind the electric strike.
As an upgrade, if the customer wanted to make the life of the receptionist easier, a low energy power door operator could be installed. This would permit the receptionist to press the button or transmitter and not only would the lock mechanism unlock, but also the door would automatically swing open, providing access.
Knowing the components necessary for assembling an electronic access control systems makes the choice or choices easier. We will begin with the lock mechanisms. Each of the lock mechanism choices has advantages and disadvantages. Choices include:
- Electric strike (including the Securitron Unlatch) type release mechanism
- Magnetic Lock
- New electrified lock
- Modifying the customer’s lock
For this scenario, a basic Grade 2 Fail Secure (intermittent duty) electric strike will provide sufficient holding force and level of security as the receptionist will monitor the electronic operation. To complete the installation, a plug-in power supply and wired (momentary pushbutton) mechanism or wireless mechanism would have to be purchased. The power supply for this type of electric strike does not require filtered or regulated power. A plug-in transformer should provide sufficient power for the electric strike and the release mechanism.
If a wireless controller and transmitter will be installed, make sure the voltage for both are the same. This will eliminate a second power supply.
Note: An AC Fail Secure electric strike buzzes when powered. The DC powered is silent except for a “click” that occurs when the keeper is released.
Installing an electric strike-type release mechanism requires modification of the wood jamb as the strike body is usually recessed deeper and wiring has to be run from the electric strike to the power supply.
Electric strike install time is about 1-3 hours for an average installation. This time can vary significantly if the 110VAC power source is not easily accessible. Whenever possible, install the power supply in an electrical or storeroom, or above a drop ceiling (non-plenum) in order to not have components easily visible.
The magnetic lock is surface mounted and requires no modification to the wood jamb. The storeroom function lever lockset would have to be replaced with a passage lockset. The receptionist would release the magnetic lock for access from the exterior side of the door.
To automatically release the magnetic lock from the interior side of the door, the passage function lockset could be equipped with a REX switch. When the inside lever is rotated, the REX switch opens and removes power to the magnetic lock.
The REX switch would require a raceway and running wires from the lockset to the magnetic lock. An electrified hinge and power supply must be purchased and installed.
An alternative to the REX switch would be a standalone motion detector installed above the door. This enables the people to exit into the receptionist’s area. Using a motion detector eliminates the need of the REX switch, raceway and the electrified hinge. Some building codes and LAHJs require an additional emergency exit button when a motion sensor is to be installed.
Magnetic lock install time is about 1-3 hours for an average installation. This time can vary significantly if the 110VAC power source is not easily accessible. Whenever possible, install the power supply in an electrical or storeroom, or above a drop ceiling (non-plenum) in order to not have components easily visible.
The electrified lockset installation does require either purchasing a new electrified lockset or electrifying the customer’s lockset, drilling a raceway, replacing the middle hinge with an electrified hinge, and a power supply.
There is no modification required for the strike or the door prep assuming the same lockset model is installed.
Electrified lock install time is about 1-3 hours for an average installation. This time can vary significantly if the 110VAC power source is not easily accessible. Whenever possible, install the power supply in an electrical or storeroom, or above a drop ceiling (non-plenum) in order to prevent components from being easily visible.
As the clock struck midnight this New Year’s Eve, the electronic locking systems decided to malfunction at both the Gramercy Park Hotel in New York and a Marriott hotel in Denver. It is not know yet...
Conference/meeting rooms for many corporations have become high tech. Video and audio equipment including large screen high definition televisions, touch sense boards and conferencing equipment come...
What are the benefits of electrically actuated cylindrical and mortise locks? The door positively latches when it is closed and shut. In fire rated and listed door situations, especially in...