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Access control system

What is the principle of community access control?

June 29 , 2023

Access control is mainly based on the door. Various access control devices are installed inside and outside the controlled door and above the door:


When the cardholder intends to enter the door, he will use the proximity card to swipe the card on the card reader outside the door, enter the password on the PIN pad, or use a biometric device such as a fingerprint reader, palmprint reader, retinal reader, etc. to check identity.


When the cardholder swipes the card, the information is transmitted to the controller near the door, and the computer in the controller recognizes that the cardholder is qualified to enter, and then sends a control signal to the electric lock above the door (or on the side of the door) , to open the door for the cardholder to enter.


After the cardholder enters the door, the door will be automatically closed (using floor springs, door closers, etc.). An induction device (lock status sensor) is often installed in the electric lock. Once the door or the electric lock is in the open state, it will send a signal back to the controller. When the door is opened for too long, the controller or the electric bell will make a sound , inform the person who opened the door to close the door quickly (this phenomenon is often seen at the door of hotel rooms).


When the controller opens the door, the cardholder's information is transmitted to the access control management computer in the computer room. After the computer receives the information, it will store the information and display it on the screen, and at the same time send the information to related software (such as attendance software, etc.).

Floor Spring

 When the cardholder intends to go out after finishing his work, he can press the exit button on the inner side of the door (when swiping the card in one direction. If the card is swiped in two directions, the card must also be swiped on the inner side of the door), and the door will open automatically. If the cardholder's information is not registered, the controller will not open the door. Only after the card information is entered into the management software and downloaded to the controller's memory, the controller will open the door when swiping the card. When the access control system is powered off, the system automatically puts the electric lock in the open state, allowing people to come in and out freely. In order to avoid being unable to escape in the event of a fire.

Author:Written by Ms.Vivian He from S4A INDUSTRIAL CO.,LIMITED

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  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...<
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