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The application of door sensor in access control system

September 22 , 2020

The door sensor is a small sensor used to detect whether the door is closed. There are many electric locks with door sensor function. We suggest that if the door sensor is used in the access control system, it is best to purchase the electromagnetic locks built-in door sensor function (with door status feedback).  If the electric door lock does not have a door sensor function, you can purchase a door sensor by yourself. The size of door sensor is small like a coin, and the price is very cheap.


For Example:

EL-600SD built in LED,door sensor and time delay( 12V,GND,NO,NC,COM)


  access control system

This is a common concealed door sensor on the market. The unwired end has a built-in magnet, and the low end with a wire has components such as reed switches. When the magnet is close, the wire outputs a closing signal. When far away, the two wires output an open circuit signal. The end without wires is installed on the top of the door, and the end with wires is installed on the door frame. When the door is closed, the two ends overlap and approach. There are many kinds of door sensors on the market, which can be used on doors and windows.

 magnetic sensor

Now let me tell you which characteristics of door sensor can be used in the access control system?


When the door is closed, it outputs a closed signal (using a multimeter to measure resistance to 0), and when the door is open, it inputs an open circuit signal (using a multimeter to measure infinite resistance).

 

P.S. 90% of the door sensors on the market have this characteristic. There are a small number of door sensors that have the opposite characteristics, or both the closed signal and the open signal are output (three wires, one is common, and the other two matching common lines output open and When the signal is closed, when you use it, you can choose one of them, another wire do not use. The door sensor of some electric locks is the same.

For example: 5-wire electric drop bolt lock (2 wires connect power supply, 3 wires are door sensor signal wires), 8-wire electric drop bolt loc (not only with door sensor output, but also with lock position status output), just leave the unused wires idle.

 

The main function of door sensor in the access control system:

1. When using multi-door interlock, the door sensor must be used to effectively realize the interlock function.such as: ACB-001 002 004 Network access controller built in interlock function

 interlock diagram

2. In the real-time monitoring of the software, you can see whether the current state of each door is open or closed.

real-time monitor

3. It can be used with S4A access controller to enable the alarm of illegal entry into the door (there is no legal operation of swiping the card or pressing the button, and the door is opened, such as kicking or prying open) or the door has not been closed for a long time. we have to configure ACB-EA05 alarm output.

 

P.S. If you don't need the access control system with these functions, you can not connect the door sensor. If these functions are needed, connect the door sensor to the door sensor input point of the controller (S1&GND port) without distinguishing between positive and negative. If the multi-door access control system, only a few of the doors use these functions of the door sensor, other door sensor input points (S1&GND port) that do not need this function are short-circuited with wires to avoid false alarm signals.


Written by Danny Zeng(Ms.) 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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