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Classification and Installation Procedure of Ladder Control Board

July 07 , 2023

Elevator access control, also known as elevator control, is mainly used to control the access authority of the elevator. Only after the authorization card is swiped on the card reader can the designated floor be reached.

1. Classification of bladder control

Since the elevator access control board is an access control, in principle it uses a relay to control the on-off of the circuit, which is essentially a switch. There are two control methods for elevator control, one is general control, that is, as long as the authorization card is swiped, it can reach any control floor. The other is sub-control, which can authorize to certain (or some) specific floors and can choose to go to the designated floors after swiping the card. The elevator control of the main control only needs one relay, and the sub-control needs as many relays as there are floors. Therefore, the method of sub-control requires a higher cost. In addition, according to whether it is connected to a network cable, it can be divided into networked ladder control and offline ladder control. The advantage of networked elevator control is that it can realize online authorization, real-time control, and real-time display of operating status. The disadvantage is that it is inconvenient to lay network cables on the ladder shaft. The offline authorization of the management card is used for offline elevator control. The advantage is that there is no need to lay network cables, and the installation is convenient. The disadvantage is that it is impossible to check the running status and access data in real-time. I only explain the offline ladder control. The use of networked ladder control is more convenient. If you understand the offline ladder control, you can understand it by analogy.

Elevator Access Control Board


2. The composition of the ladder control

The ladder control is generally composed of a control panel, a Wiegand RFID Card Reader(also known as a reader), and a card issuer. It should be noted that the offline elevator control is very convenient to take power. It can support power from 8V to 32V, so it can directly take power from the back panel of the elevator. The online elevator control only supports 12V power, so an external power supply may be required.

3. Ladder control installation method

In short, the elevator control is the floor button in the elevator shaft or the door button outside the floor. Open the elevator button panel, you can find that there are 4 flat wires behind each button, one of the 4 flat wires is the positive pole of the 12V power supply (usually red), find it, and it is what we want to control.

1) Wiring of master control ladder control

Cut off the 12V positive poles of all the floor buttons to be controlled from the middle, connect the two ends to a wire, and then connect the outgoing wires of the stringed wires to the NC and COM terminals of the elevator control board. Why are they connected to NC and COM? As for the terminal, safety factors must be considered, because connecting to NC and COM means that the line is connected by default when the elevator control board is powered off, that is, the elevator button can be pressed, so that even if the elevator control board is broken, it will not work. Yes, the elevator can still operate according to the original logic. Some people may ask, what is the use of installing the elevator control, don't worry, although the line is connected to NC and COM, but we can pre-set in the elevator control software that NO and COM are connected, NC and COM are connected. COM is disconnected, so that only after swiping the card, NC and COM will be connected, and the purpose of control is realized.

2) Wiring of separate control ladder control

The difference from the master control type is that after the 12V power cord behind each elevator button is cut off, its two ends are respectively connected to the NC and COM terminals of the relay specified on the elevator control board, and they must be connected in sequence, such as connecting to the first floor. One relay, the second floor is connected to the second relay, and so on, if there is a skipped floor in the middle, the corresponding relay should also be skipped on the elevator control board.


Author: Written by Ms.Anna Zhang 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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