In the underground network of modern cities, tens of thousands of passengers rely on subways for their daily commutes. A transparent barrier stands quietly at the edge of the platform, safeguarding the safety of every passenger—this is the subway screen door system. Today, let us explore this crucial facility related to urban transportation safety.
Screen doors are not just “a door”
With the acceleration of urbanization, subway networks are becoming increasingly dense, and screen door systems have become an indispensable safety guarantee for modern rail transit. It is not only a physical barrier but also an intelligent system that integrates safety protection, energy consumption management, and operational optimization.
01Comprehensive Safety Assurance
> Effectively prevents the risk of passengers or objects accidentally falling onto the tracks
> Provides reliable safety assurance for fully automated driverless lines
> Creates a safe waiting environment, enhancing passenger safety perception
02Significant Energy Savings
> Reduces energy consumption of platform air conditioning
> Lowers initial investment and operating costs of environmental control systems
> Optimizes human resource allocation, achieving more efficient operational management
03Upgraded Travel Experience
> Effectively blocks noise and draft generated by train operations
> Keeps the platform environment clean and comfortable
> Improves train punctuality and passenger flow efficiency
Aotuo NA400 Series PLC: The Intelligent Core of the Screen Door System
In many lines such as the Suzhou Metro, Aotuo Technology PLC serves as the “smart brain” of the screen door control system. This solution uses the NA400 series redundant CPU 401-0521, with two CMM401-0102 DP master station modules controlling the platform doors on both sides, ensuring stable operation of the system through redundancy.
Precise Execution Control
The NA400 PLC is responsible for executingdoor opening and closing, obstacle detection, emergency handling, and other core control functions, ensuring that every operation is precise and reliable.
Comprehensive Data Perception
The system collects and processes various sensor data in real-time, including lock status monitoring, door position detection, manual switch signals, etc., achieving comprehensive status monitoring.
Efficient System Interaction
NA400 PLC serves as a communication hub, enabling real-time data exchange and collaborative operation with multiple systems such as signaling and monitoring.
Safety Interlock Protection
Built-in safety logic control strictly enforces the safety interlocks of “doors do not open until the train has stopped” and “doors must close before the train leaves the station”, providing multiple layers of protection for passengers.
Aotuo Technology is committed to using self-developed PLC products to help rail transit move towards a smarter and safer future. We provide not only hardware equipment for the Suzhou Metro but also a serious commitment to safety.
Sticking to the original intention of controllable domestic products, Aotuo will continue to use stable and reliable control technology to safeguard the orderly operation of urban underground arteries, warmly accompanying every passenger’s travel time. With technological advancements and deeper applications, we look forward to making subway travel smarter and more efficient, ensuring that every journey is safe and comfortable.
Learn moreFollow Aotuo Technology
Nanjing Headquarters
Address:8th Floor, Building D, Yunmi City, No. 19 Ning Shuang Road, Yuhua District, Nanjing, Jiangsu Province
Phone:025-68530188 (Switchboard)
Fax:025-68530178
Service Hotline:400-025-0155
Technical Support:025-68530179
Email: [email protected]
Website: www.atekon.com
Beijing Branch
Address: Room 828, Building B, Jinxin Mansion, No. 16 Lianhuachi West Road, Haidian District, Beijing
Phone: 18905184188
Qingdao OfficeAddress: 5th Floor, North Skirt Building, Fucai Mansion, No. 135 Yan’an Third Road, Qingdao, Shandong ProvincePhone: 13853282618
Xi’an OfficeAddress: Room 704, Building B, Jingfa Mansion, No. 2 Fengcheng Second Road, Weiyang District, Xi’an, Shaanxi ProvincePhone: 17396800573
Dongying Office
Address: Room 201, Unit 2, Building 3, Jintai Garden, No. 9 Zibo Road, Dongying District, Dongying, Shandong Province
Phone: 18905187373
Wuhan Office
Address: Room 3002, T2 Office Building, Vanke Future Center, No. 408 Hanyang Avenue, Hanyang District, Wuhan, Hubei Province
Phone: 18168073077
Chengdu Office
Address: Room 1519, Building A, Waltz Plaza, No. 7 Aviation Road, Wuhou District, Chengdu, Sichuan Province
Phone: 18905184088
Guangzhou Office
Address: Room 603, Building 2, No. 6 Jiapin Second Street, Shatou Street, Panyu District, Guangzhou, Guangdong Province
Phone: 17396800575
Fuzhou Office
Address: Room 306, Building S12, Phase III, China Resources Land Center, Hongshan Garden Road, Gulou District, Fuzhou, Fujian Province
Phone: 18914712985
Shenyang Liaison Office
Address: 8-10, Building 4, Letian Shengyuan, No. 9 Qizhong Road, Huanggu District, Shenyang, Liaoning Province
Phone: 18120175097
Daqing Liaison Office
Address: Room 2803, Unit 1, Building 4, Kunlun Tangren Center, No. 25 Juxian Street, Ranghulu District, Daqing, Heilongjiang Province
Phone: 18905184188
Chongqing Liaison Office
Address: 8-1#, Building 1, Times Tianjie, Yuzhong District, Chongqing
Phone: 13668018588
Kunming Liaison Office
Address: Room 2113, Building A, Yuntong Times Plaza, No. 363 Jinbi Road, Xishan District, Kunming, Yunnan Province
Phone: 13619673625