Mains automatic detection function: automatically by an external switch signal, the state of the mains automatic long-term testing, discrimination. Once the mains failure, loss of power, the unit begins to automatically start immediately;
Unit automatic control functions: mains failure the loss of power by the system when the unit is in the automatic mode, 3 seconds to confirm automatically start the unit the closing cast net, power supply. From the start cast net supply time <12 seconds. When the electricity is restored, the system 3 seconds to confirm, the unit automatically trip back network delay of 3 minutes, automatic uninstall downtime, and the state of readiness to enter the next start automatically;
Mains, the unit automatically switches the system functions: The system has mains, two-way power unit automatically switches the function of the power supply automatically switches mains power to the unit. Mains under normal conditions, the system has a mains the priority-powered function when mains power failure, the system can automatically switching unit side by the unit to automatically load power supply; when electricity is restored, the system can automatically switching to the City electric side of the mains power supply to the load automatically, with mains priority function.