FAQ
Electromagnetic lock

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  • Q: 10) The bolt keeps jumping after the power on (Electric bolt lock)

  • A:

    Check the input of the power, whether it's accord to the demand(12V,1A or above), if yes

    Change the power/voltage for specializing version or  Change the high-quality wire

    and make sure the length is within 10m.




  • Q: 11) The movement of the bolt is abnormal

  • A:

    Check power connection/indication, if yes, Change the power/voltage for special use.

    or Change the high-quality wire and make sure length is within 10m.



  • Q: 12) After the installation, the release button won't work with the electric lock

  • A:

    Check with the model of release button that's been used, whether it's a NO or NC type.


  • Q: 13)How does a electromagnetic lock work?

  • A:

     Electromagnetic locks consist of an armature and a coil assembly, which become magnetized when an electric current passes through them. This magnetic field secures the door and electronically controls when doors are locked and unlocked. Electromagnetic locks are fail-safe by design.


  • Q: 14)How strong are electromagnetic door locks?

  • A:

    Because the mating area of the electromagnet and armature is relatively large, the force created by the magnetic flux is strong enough to keep the door locked even under stress. Typical single door electromagnetic locks are offered in both 600 lbs. (2669 N) and 1200 lbs.


  • Q: 15)How do you beat a magnetic lock?

  • A:

    An 0.015-inch aluminum sheet cut to fit the strike plate and fixed by an adhesive will go unnoticed and reduce the magnet locks holding force from 1200 pounds to approximately 300 pounds. Most men can put that much shoulder into jarring the device open.


  • Q: 16)Do power locks use electromagnets?

  • A:

    Magnetic door locks use an electromagnetic force to stop doors from opening, so they are ideal for security. Maglocks, such as the Deadlock mag locks are made up of an electromagnet and an armature plate. The plate is attached to the door and the magnetic to the door frame.


  • Q: 17)How do you unlock a padlock with a magnet?

  • A:

    Clean off any residue such as tape or grease from the back of the lock you wish to open and make certain it is dry. ...

    Pull up the top of the lock as far as it will go. ...

    Turn the wheel to the right or clockwise slowly. ...

    Continue turning the wheel clockwise slowly until you feel another bump.


  • Q: 18)How do I install a push to exit button?

  • A:

    Connect the negative terminal from your REX button to the negative lead from your power supply. Then, connect the positive terminal from your REX button to the positive lead from your power supply. When you plug your power supply back in, the LED of the button should turn on.


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Contact Us
  S4A-Security For All.S4A Industrial Co., Limited, Founded in 2010, We have been dedicating in access control production R&D and sales for 10year till now. With the belief that we do one thing well in a lifetime, our CEO has been in this industry for 15 years. During the past 10 years, our products have been exported to various countries and regions. And 90% of customers come from the recommendations of cooperative customers, and 80% of the turnover comes from cooperative customers in the past 10years.Your business is a plant, we are the gardener, our mission is to water and fertilize the plant, and make it become the towering tree. We attach great importance to the partner's appeal, customer's suggestions, and feedbacks. To strengthen Product quality awareness, client's service awareness. Our clients and S4A are on the same path walking for many years.       S4A's future would be even more brilliant, this is related to all of our staff's working sweat. When you join this team, you will feel an invisible power to drive walk forward. S4A mainly produces a series of security Door Access Control such as:Network Access Controller, Locker board, Electromagnetic lock, Standalone door Controller, Automatic door opener, etcOur team can manufacture products, sell products, and do after-sales.In the realm of access control, one company stands out for its unwavering commitment to providing security services for everyone. S4A, which stands for "Security for All," has been at the forefront of access control technology for the past 13 years. With its own state-of-the-art factory and a strong focus on research and development, S4A has continuously delivered cutting-edge access control machines with the latest functions. Their dedication to product quality, customer feedback, practicability, and cost performance sets them apart as a leader in the industry.Factory and R&D Expertise:S4A takes pride in its fully-equipped factory, where skilled engineers and technicians work tirelessly to develop and manufacture access control solutions that meet the highest standards. The company's investment in research and development has resulted in a steady stream of innovative products that cater to evolving security needs.By staying ahead of the curve, S4A ensures that their customers have access to the latest advancements in access control technology.Quality Assurance and Customer Feedback:At S4A, product quality is of paramount importance. The company adheres to rigorous quality control procedures throughout the manufacturing process to guarantee the reliability and durability of their access control machines. Each product undergoes comprehensive testing to ensure it meets industry standards and exceeds customer expectations. S4A also places great value on customer feedback, actively seeking input to continuously improve their products and services. By listening to their customers, S4A maintains a customer-centric approach and delivers solutions that address real-world security challenges.Practicability and Cost Performance:S4A understands that access control solutions must not only be technologically advanced but also practical and cost-effective. The company's emphasis on practicability means that their products are designed to be user-friendly, easily integrated into existing systems, and adaptable to various environments. S4A's access control machines are known for their intuitive interfaces, simple installation processes, and seamless compatibility with other security systems. Additionally, S4A strives to provide cost-effective solutions without compromising on quality. Their competitive pricing ensures that security is accessible to businesses and individuals of all sizes.With 13 years of industry experience, S4A has cemented its position as a leading provider of access control solutions. Through their dedication to "Security for All," the company has set a benchmark for excellence in product quality, customer satisfaction,practicability, and cost performance. S4A's in-house factory and research and development capabilities enable them to stay at the forefront of technological advancements in the field of access control. As the company continues to evolve and innovate, S4A remains committed to empowering individuals and organizations with the highest level of security, ensuring that everyone can enjoy the peace of mind that comes with a reliable and efficient access control system.We can create value for you!Quality takes great importance for a company's credibility, and buyer's every penny spend must worth it. That is our most basic principle. Our business mainly for wholesale, so we could offer large quantities at competitive prices. During the past 10 years, We work hard to create value for our customers, and with our help, customers have an increasing market share. 99% of the customer...<
  • Address

    Factory Address:Building S4A, South Third Lane, Qiuyuling Street, Zhangkeng Village, Hengli Town, Dongguan City, Guangdong Province Office Address:2nd Floor of Jinmin'an Industrial Zone, #529, Bulong Rd. Bantian St. Longgang Dist. Shenzhen, PRC.

  • Call us

    0086 755 29450011

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If you are interested in our products and want to know more details,please leave a message here,we will reply you as soon as we can.

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