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S4A Industrial Co.,Limited
Sales Hotline:  86 755 2945 0011
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E-mail: sales@s4a-access.com
Address: 6th Floor, Haotai Industrial Zone,Minzhi Road,Longhua New District,Shenzhen,PRC. 518131
Electromagnetic lock ADVANTAGE
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  • Components


    A magnetic lock, often referred to as a mag lock, consists of an electromagnet and an armature plate. 

    The magnet is mounted inside of the door opening, which prevents tampering, while the plate is installed on the face of the door. 

    When the magnet is connected to an electrical source, it produces a strong magnetic attraction that holds the magnet tight to the plate, 

    effectively locking the door. The lock is typically powered using either the building's electrical system or a separate battery pack. 

    Because a mag lock can only be used with DC power, a converter unit must be added when relying on building power. 

    These locks are said to be 'fail-safe,' meaning that once the power goes out, the door will remain unlocked, allowing occupants to exit safely.


    Electromagnetic Theory


    Mag locks are based on the science of electromagnetism. Based on the principles of electromagnetism, 

    when a current is run through a loop of wire, or solenoid, a magnetic force will be produced. This magnetic force is of sufficient 

    strength to prevent the door from opening under a specified amount of pressure. To increase the strength of the magnetic force, 

    multiple solenoids may be used, or they may be placed around a core made of iron. 

    The magnetic effect of the solenoids not only produces its only force, but also amplifies the natural magnetism of the iron. 

    Mag locks are rated based on the amount of force they are able to withstand without failing. For example, 

    a 1,200 pound Mag Lock can withstand 1,200 pounds of force while still keeping the building secure.




    One of the biggest advantages to using a mag lock is that it can't be picked or tampered with like a traditional lock cylinder. 

    No keys are used, as the lock is generally tied into an electrical security system. These systems rely on one of four basic methods to operate the lock. 

    They are often connected to a buzzer, which must be manually released by someone inside the building before the door will open. 

    A mag lock may also be used with a keypad system, where occupants enter a numerical code to activate the lock and open the door. 

    In many commercial settings, card readers are used with these locks, making it easy to deactivate a card in the event an employee is

    terminated or loses his/her key card. Finally, in high-security situations, the mag lock may be activated by scanners that read fingerprints, 

    retinas, or facial features of an occupant before they are permitted to enter.

  • Magnetic locks and electric strikes are electrical hardware devices used to maintain the security of a door opening. 

    Both of these devices can be activated by a range of tools, including passcodes, biometric readers, keycards or buzzers. 

    When comparing magnetic locks to electric strikes, consider factors such as intended function, security needs, 

    safety egress and cost to help you choose between the two.




    A magnetic lock, or mag lock, consists of a large magnet that is installed along the top of a door frame. A metal plate, 

    or armature plate, is fastened to the door so it lines up with the magnet. When electrical power is supplied to the magnet,

    it creates a magnetic charge that keeps the magnet tightly pressed to the metal plate. This keeps the door securely locked until power is removed or interrupted.


    An electric strike must be used along with some other form of locking device, such as a lockset or exit device (panic bar). 

    Electrical power is supplied to the strike, which holds the lock bolt in place, keeping the door locked until the strike is activated by a buzzer, keycard or other device.




    With a magnetic lock, the door is always locked from both sides of the opening. This makes mag locks a very secure option for 

    areas that require high levels of security. Users must activate the lock with a keycard or other device when leaving and when entering. 

    A handle or latchset is used to operate the door, but typically has no locking function.


    Electric strikes provide security only for the exterior side of the door. Occupants can freely exit at anytime from inside the building 

    simply by turning the knob or handle, or by depressing the pad on the exit device. From the outside, the door can only be 

    unlocked with a keycard or other activating device, which signals the strike to release the lock bolt.




    All electrical hardware can be described as either 'fail-safe' or 'fail-secure.' Fail-safe hardware stays locked when 

    power to the hardware is cut, keeping the building secure. Fail-secure hardware unlocks once power is cut, 

    allowing for safe egress of occupants. A magnetic lock is always fail-safe, and unlocks automatically if power is cut.

    Electric strikes can typically be set to either of these two options using an integral switch. All fire-rated doors must be equipped 

    with fail-safe hardware for safe egress at all times.




    Because a magnetic lock is installed on the face of the door and frame, it can be installed relatively easily by most contractors. 

    It is one of the most effective types of hardware for securing both sides of a door, and provides a great door of force to keep the door secure.


    Electric strikes are usually more affordable than magnetic locks, making them a good choice for building managers on a budget. 

    It is also easier in general to meet fire and life safety codes with an electric strike than with a mag lock. 

    An electric strike is much less likely to delay egress because it can be easily operated from the inside of the building.




    Magnetic locks are among the more expensive types of door hardware. They are also fairly easy for burglars to beat, 

    because they will no longer keep the door locked if the power is cut. Finally, these locks pose a potential safety hazard in terms of slowing egress during an emergency.


    Because of the complexity of powering and installing electric strikes, they typically require skilled installers. These strikes must be chosen carefully based on the type of lock they will be used with. If the wrong strike is chosen, the lock bolt won't fit securely inside.

  • Magnetic locks possess a number of advantages over conventional locks and electric strikes. For example, 

    their durability and quick operation can make them valuable in a high-traffic office environment where electronic authentication is necessary.




    1-1:Remote operation: Magnetic locks can be turned on and off remotely by adjusting the power source.

    1-2:Easy to install: Magnetic locks are generally easier to install than other locks since there are no interconnecting parts.

    1-3: Quick to operate: Magnetic locks unlock instantly when the power is cut, allowing for quick release in comparison to other locks.

    1-4: Sturdy: Magnetic locks may also suffer less damage from multiple blows than do conventional locks. 

           If a magnetic lock is forced open with a crowbar, it will often do little or no damage to the door or lock. There are no moving parts in an electromagnetic lock to break.




    1-1: Requires a constant power source in order to be secure.

    1-2: Can de-energize in the event of a power outage, disabling security.

    1-3: Expensive in comparison to mechanical locks.

    1-4: Requires additional hardware for safe operation.

  • The magnetic lock is suitable for both in-swinging and out-swinging doors. Brackets (L bracket, LZ bracket, U bracket) are 

    used to orient the armature for use with both applications. Filler plates are also used to provide a large, flat mounting area 

    on the door frame when the electromagnet is larger than the available mounting space on the door frame due to the frame's geometry.


    The magnetic lock should always be installed on the secure side of the door. Most installations are surface mounted. 

    For safety, magnetic lock, cables, and wires should be routed through the door frame or flush mount with wire moulding.


    Installation is straightforward. With in-swinging applications, the electromagnet is typically installed in the opening corner of the 

    door at the door's header. Maglocks can also be installed vertically in the door opening when they are furnished with a full length housing. 

    With this configuration the armature is through-bolted through the door and oriented to mate with the face of the electromagnet. 

    The armature plate and electromagnet must touch in order to provide locking holding force.


    With out-swinging applications, the electromagnet is typically installed on the side of the door header. In this configuration, 

    the armature is mounted on a Z shaped bracket that orients the armature to mate with the electromagnet.


    Magnetic locks are almost always part of a complete electronic security system. Such a system may simply consist of an attached 

    keycard reader or may be more complex, involving connection to a central computer that monitors the building's security. 

    Whatever the choice of locking system, fire safety is an important consideration.


    Other variations and improvements on the electromagnetic locks have been developed. The most remarkable is the shear lock, 

    where the armature does not directly pull off the face, but the load is instead in shear, like a mechanical stop. The shear magnetic lock 

    allows a door to swing in both directions, as opposed to the original (and now ubiquitous) direct pull type, which normally works 

    either in an in-swing or out-swing configuration. In order to provide the shear magnetic lock with the appropriate holding force, 

    then two pins lock the armature onto the magnet itself, and ensure that the magnet locks into place.


    If you have any inquiries for installation, pls kindly contact us, sales@s4a-access.com we have our own manufacture and 

    within 12years production experience for magnetic lock,All locks, we provide OEM and ODM service and 1 year quality guarantee.

  • For safety purposes, electric locks and electric strikes can be designed to operate in one of two modes:


    Fail-safe –to protect people: The lock is released if power cuts off.


    Fail-secure (also known as non fail safe) to protect property: The lock remains closed if power cuts off.

    This type of lock has a cylinder, similar to those found in conventional locks. The cylinder makes it possible for the lock to remain secure,

    even if the power supply is cut off.


    An electromagnet lock is ONLY Fail-Safe, so it must satisfy applicable fire regulations so as to be safe in emergency situations.

  • The minimum you need is the lock, power supply and a request-to-exit button. The request-to-exit button unlocks the door for exit, 

    but most local fire codes require at least 2 methods to unlock the door.


    There are a few components that are required for a magnetic lock installation:


    1-1: Select a Magnetic Lock. You should choose a lock strength (EL-600 to EL-1200 ) =600-1200lbs appropriate for your door.

    1-2: Add a Power Supply with Battery Backup. Model is: PS-300B is a good choice.

    The battery backup is critical to ensure that your door stays locked if the power goes out.


    1-3: dd a Request-to-Exit Button, which will unlock the door when pushed.EB series or non-touch version. EB-16 or EB-17


    1-4: Add an optional Motion Sensor, which will unlock the door automatically when someone approaches the door from inside.

    Model is M-204


    Also, you could choose a Relay Timer to keep the door unlocked for a specific time period, to allow for the delay 

    between when a person presses the Request-to-Exit button and when they push open the door.


    Check out s4a-access.com for a complete Maglock package configured specifically to work with your systems.

  • If you have any questions about what maglock hardware would be most appropriate for your facility please contact +86 134 1050 0721 

    or landline at working time: +86 755 29450011 EXT: 608 606 602 etc

Sales Hotline: 86 755 2945 0011
Mob: 86 134 1050 0721
E-mail : sales@s4a-access.com
Address : 6th Floor, Haotai Industrial Zone,Minzhi Road,Longhua New District,Shenzhen,PRC. 518131
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