The EM780-B fire door monitor meets the requirements of GB29364-2012 "Fire Door Monitor" and adopts an embedded design concept. It is small in size, low in power consumption, and has powerful control functions. It can monitor the opening and closing status of fire doors in buildings in real time. When a fire occurs, it can control normally open fire doors to automatically close, achieving fire isolation. When the fire door experiences an abnormal state, the monitor will sound and light an alarm until the abnormal state of the fire door is eliminated.

EM780-B is also the core power supply unit of the entire system, with a built-in high reliability 24V DC power supply, providing stable power supply for the fire door monitoring module and actuator. At the same time, EM780-B is equipped with a backup power supply internally, which will automatically switch to the working state in case of a power outage, ensuring that the system continues to operate in the event of a power outage.