Application Overview: A company's computer room primarily uses UPS systems for power distribution, ensuring reliable power supply. Each UPS circuit employs an automatic air circuit breaker for overcurrent protection. While effective, this protection is not intelligent; it cannot be configured, does not trigger alarms, and lacks records of power supply and fault alarm information. This does not meet high reliability requirements, necessitating further upgrades. Sibo, a leading domestic industrial communication system integrator, developed an iPDS (Intelligent Power Distribution System) based on the DeviceNet bus for this computer room. This system effectively meets the above requirements, featuring both intelligence and user-friendliness. The system uses the DeviceNet bus for data exchange and transmission, perfectly satisfying requirements for system reliability, real-time performance, and cost. The goal is to establish a system capable of real-time monitoring and displaying information such as the current status of each power supply in the computer room, while maintaining high reliability and real-time performance. The system can flexibly configure monitoring information according to user requirements and handle faults in real time. System Structure: This system consists of a data processing unit (PC), data acquisition nodes, gateways, adapters, etc. The overall system structure is complex yet functionally complete. The software on the PC displays the system's main interface, used to set system configuration information, display current, leakage current, neutral-to-ground voltage, and the status of automatic air circuit breakers for each channel, and allows viewing historical alarm records. The PC's serial port and DeviceNet bus are connected via the SC100 adapter, a product independently developed by Sibo Company. Power-related data acquisition is performed by the EM200. Since this product's port is RS485 or RS232, the MD21 is used as the gateway for the EM200 to connect to the DeviceNet bus. The system acquires analog and digital signal information from various channels and transmits it via the DeviceNet bus for processing by the data processing unit. The data is transmitted to the main control PC for user viewing, and automatic or manual control commands are issued to drive devices such as automatic air circuit breakers, achieving real-time fault handling. System Advantages: 1. The intelligent power distribution system is built using DeviceNet bus technology, improving system stability and reliability; 2. DeviceNet's maximum speed can reach 500K, ensuring real-time data transmission; 3. The network is managed using chip hardware IDs, making fault node identification very convenient and reducing network maintenance costs; 4. The network has good upgrade and expansion capabilities, supporting plug-and-play hardware nodes.