Metro Environment and Equipment Monitoring System (BAS) Solution

① The host uses NA400 hot standby redundant CPU to realize the functions of CPU redundancy, network redundancy, power supply redundancy, and DP bus redundancy.

② The remote I/O is composed of NA200 series I/O acquisition module and CMM201-0203 dual DP interface Profibus DP slave module.

③ Serial communication module CMM201-0201 realizes the interface of inverter, chiller group control cabinet, intelligent low voltage, lighting, escalator, fire control and other communication equipment, with two RE485 interfaces, one Ethernet interface .

④ CMM401-0205 dual Ethernet The interface network communication module is responsible for communicating with the integrated monitoring system to meet the requirements of the read interface.

　　Solution for Centralized Control System of Metro Screen Door

① The control system is divided into a main frame and an expansion frame. The main frame is installed with a hot standby redundant power supply module (which can work with a single power supply), dual CPUs, and dual Profibus DP master station communication modules.

② I/O modules are installed in the expansion rack, and a professional bus cable is used to connect the main rack and the expansion rack.

③ Each CPU integrates an Ethernet interface (Modbus TCP), independent IP address, and is responsible for communication with the integrated monitoring system.  

④ Dual Profibus DP communication interface module, respectively communicate with the upstream and downstream gate control unit DCU, can achieve bus redundancy and single bus two schemes.