On March 1, 2019, China Industrial Control Network hosted the "Intelligence. Zhiyuan" 2019 China Automation and Intelligent Manufacturing Services Annual Conference was held in Beijing. The Nanda Automation Technology Railway Tunnel Disaster Prevention Safety Monitoring System Solution was highly affirmed and praised by the jury, and won the CAIMRS "Intelligent Manufacturing Model Award".

Our company's products mainly complete the data collection of the tunnel monitoring center and on-site monitoring terminal. Among them, the tunnel monitoring center uses NA400 medium and large PLC to complete. The hot standby redundant system solution can realize power supply redundancy, CPU redundancy, and network redundancy to ensure the safety and reliability of data collection. The on-site monitoring terminal mainly uses our company's NA200H series integrated Ethernet interface small integrated controller. The NA200H system controller integrates an Ethernet interface, multiple RS485 interfaces, and rich I/O interfaces. The site now has ground-level data collection and control work. It completes data exchange through optical fiber ring network and NA400 PLC.

　　Network structure diagram of monitoring system

　　Monitoring center screen