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How to Adjust Opening Angle and Speed for the S4A ED100 Automatic Door Opener?

March 25, 2026

At S4A Industrial Co., Limited, we prioritize not only providing high-quality access control hardware but also ensuring our global partners have the technical support needed for a perfect installation.

Recently, one of our valued clients encountered a common installation challenge with theS4A ED100 Automatic Door Opener. After the initial setup, the door was opening with too much force and slamming against the adjacent wall. This is a representative issue that can occur when the default factory settings do not match the specific physical constraints of the installation site.Here is how S4A guides customers to solve this problem to ensure smooth, safe, and professional door operation.

The Problem: Door Over-travel and Wall Impact

When an automatic swing door slams into a wall, it can cause structural damage to the glass, hinges, or the motor itself. This typically happens because theopening angleis set too wide for the space or thebackcheck speed(the slowing down phase) is not properly calibrated.

The S4A Solution: 2-Step Technical Adjustment

This is a 90° swing door operator. To adjust the opening angle and prevent the door from hitting the wall, you only need to move the mechanical stop block on the sliding rail to the right.

By adjusting the position of this sliding rail stop block, you can limit the maximum opening angle of the door, making it open smaller and softer, so it will no longer bump against the wall.


How to Adjust Opening Angle and Speed for the S4A ED100 Automatic Door Opener?



How to Adjust Opening Angle and Speed for the S4A ED100 Automatic Door Opener?

Why Choose S4A Support?

With over 16 years of experience in the access control industry, S4A doesn't just sell products; we provide integrated solutions. Whether you are installing magnetic locks, RFID readers, or automatic door openers, our technical team is ready to provide the scripts, manuals, and troubleshooting steps needed to keep your project on track.


Are you experiencing a similar installation challenge?Visit our technical resource center atwww.s4a-access.comor contact our support team for a step-by-step wiring and adjustment guide.




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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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