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Access Control Card

July 26 , 2025
Access Control Card

In modern life, access control cards are an indispensable part of daily life. In residential areas, office buildings, schools, shopping malls and other places, they not only bring convenience but also serve as a safety line.

1. Functional principle
Access control cards are used in intelligent access control systems. The system consists of a host, a card reader and an electric lock (plus a computer and a communication converter when connected to the network). Using contactless card reading, the cardholder swings near the card reader (5-15 cm). After sensing, the access coontrol card reader transmits the card number to the host. The host verifies the legitimacy and decides whether to open the door based on the authority. The core relies on internal chip technology.

2. Type characteristics
(I) By card type
Magnetic card (Access Control ID card): low cost, simple process, one person per card for management personnel to enter and exit, can be connected to the network to record the door opening time and personnel information, but easy to wear, general security, no two-way control, information is easily lost due to magnetic field interference.

Radio frequency card (Access Control IC card): contactless, can be used when close to the card reader, convenient and efficient, long life (at least ten years), high security (encryption technology is difficult to copy), can record information online and can be controlled in two directions (such as remote reporting and unblocking), but the production cost is relatively high.

(II) According to the card reading distance
Contact type: requires direct contact with the card reader (such as the old magnetic stripe card slot), mature technology but inconvenient operation, and the contact part is easily damaged.
Inductive type: can be within the sensing range (several to ten centimeters), no contact, high efficiency, less wear, and widely used (such as IC card).

III. Application scenarios
Residential community: to ensure the safety of residents, restrict the entry and exit of personnel, can be combined with vehicle management, and can also be used for unit building doors and elevator control.
Office space: manage employees and visitors, record employee attendance, authorize visitors, and set different permissions according to positions.
School: distinguish between the management of teachers and students and outsiders, facilitate attendance and safety management, and can be used for dormitory management.
Public places: shopping malls manage employee passages and warehouses, hotels manage employee areas and guest room floors, hospitals manage medical passages, drug warehouses and other important areas.

IV. Precautions for use
Proper storage: Do not lend it out at will to prevent loss. If lost, report it in time for replacement.
Avoid damage: Prevent bending, water immersion, strong magnetic fields, and replace it in time for damage.
Comply with regulations: Different places have different regulations, which must be strictly to maintain safety and system operation.
In short, access cards are an important tool for modern security management and convenient access. Understanding their relevant knowledge will help better use and improve safety awareness.


Author: Written by Ms.Lisa Zhu from S4A INDUSTRIAL CO., LIMITED

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...<
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    Factory Address:Building S4A, South Third Lane, Qiuyuling Street, Zhangkeng Village, Hengli Town, Dongguan City, Guangdong Province Office Address:#601,floor 6 ,building 1,JINFANGHUA industrial zone, Bantian St. Longgang Dist. Shenzhen, PRC.

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